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. Author manuscript; available in PMC: 2024 Nov 22.
Published in final edited form as: J Pediatr. 2021 Jan 29;232:118–126.e23. doi: 10.1016/j.jpeds.2021.01.053

Childhood Risk Factors and Adulthood Cardiovascular Disease: A Systematic Review

Lindsay R Pool 1, Liliana Aguayo 1,2, Michal Brzezinski 3, Amanda M Perak 1,4,5, Matthew M Davis 1,2,5,6,7, Philip Greenland 1, Lifang Hou 1,5, Bradley S Marino 2,4,5,7, Linda Van Horn 1, Lauren Wakschlag 6,7, Darwin Labarthe 1,6, Donald Lloyd-Jones 1,6, Norrina B Allen 1,6
PMCID: PMC11583247  NIHMSID: NIHMS2009012  PMID: 33516680

Abstract

Objective

To conduct a comprehensive review of the literature on childhood risk factors and their associations with adulthood subclinical and clinical cardiovascular disease (CVD).

Study design

A systematic search was performed using the MEDLINE, EMBASE, PsycINFO, CINAHL, and Web of Science databases to identify English-language articles published through June 2018. Articles were included if they were longitudinal studies in community-based populations, the primary exposure occurred during childhood, and the primary outcome was either a measure of subclinical CVD or a clinical CVD event occurring in adulthood. Two independent reviewers screened determined whether eligibility criteria were met.

Results

There were 210 articles that met the predefined criteria. The greatest number of publications examined associations of clinical risk factors, including childhood adiposity, blood pressure, and cholesterol, with the development of adult CVD. Few studies examined childhood lifestyle factors including diet quality, physical activity, and tobacco exposure. Domains of risk beyond “traditional” cardiovascular risk factors, such as childhood psychosocial adversity, seemed to have strong published associations with the development of CVD.

Conclusions

Although the evidence was fairly consistent in direction and magnitude for exposures such as childhood adiposity, hypertension, and hyperlipidemia, significant gaps remain in the understanding of how childhood health and behaviors translate to the risk of adulthood CVD, particularly in lesser studied exposures like glycemic indicators, physical activity, diet quality, very early life course exposure, and population subgroups.


Cardiovascular disease (CVD) is the leading cause of death in the US: more than 1 million adults experience coronary events and more than 800 000 adults experience strokes each year.1 Although childhood clinical CVD is rare, CVD events that occur in adulthood, including myocardial infarction and stroke, are the products of the lifelong atherosclerotic process that begins in youth.2 Thus, the prevention and management of childhood risk factors and preservation of cardiovascular health across the lifespan are pediatric care priorities.3

Recognizing the early origins of CVD risk, research studies have begun to address the complex processes of risk development across the life course.4,5 Identifying childhood risk factors that are most strongly linked to the development of adult CVD can provide scientific evidence for childhood intervention, whereas identifying risk factors for which long-term data are sparse may guide future investigation.

Our objectives were to provide a comprehensive review of the existing literature on associations of childhood risk factors with adulthood subclinical and clinical CVD and identify evidence of emerging disparities in CVD risk as individuals age from childhood into adulthood, including age, sex, and race/ethnicity. The literature search and review was based on known adult risk factors for CVD, potential risk factors as stated in pediatric guidelines, and developmental factors arising at birth that may significantly impact the risk of adult CVD.3,6

Methods

A literature search was conducted using the MEDLINE, EMBASE, PsycINFO, CINAHL, and Web of Science databases to identify English-language articles published through June 2018. A research librarian assisted in planning the search and created correct search strings for the electronic databases. A full list of the search terms appears in Table I (available at www.jpeds.com). We did not search for unpublished articles nor did we review reference lists of included articles to identify additional studies. After deduplication, the search returned 8652 titles and abstracts.

Table I.

Review search terms

Concepts Terms

Population at the time of exposure fetal environment, birth, childhood through age 20 years Terms: child*, adolescen*, infan*, puberty, youth
Childhood exposure Terms: metabolic syndrome, MetS, blood pressure, BP, hypertens*, cholesterol, lipid, hypercholesterolemia, dyslipidemia, hyperlipidemia, triglycerides, statin, glucose, glycemic, diabet*, insulin, adiposity, obes*, weight, waist circumference, BMI, body mass index, body composition, body size, diet*, nutri*, food*, intake, beverage*, physical activit*, exercise, fitness, sedentary, acceleromet*, smok*, cigar*, tobacco, secondhand, cotinine, preterm, birthweight, gestation*, breastfeed*, advers*, adverse childhood experiences, emotional distress, socioeconomic*, parental death, in utero
Population at the time of outcome adulthood age 20 years and older Terms: adult*, middle age, older age

Articles were included if they met the following a priori criteria: (1) longitudinal study design; (2) exposure occurred/characteristic emerged during childhood (infancy through age 20 years); (3) outcome ascertained in adulthood (ages ≥20 years); (4) the primary outcome was either a measure of subclinical CVD or a clinical CVD event; and (5) the study population was community based, not a clinically defined population (eg, patients with congenital heart disease). Descriptions of the included clinical and subclinical CVD outcomes and their common measurement methods are outlined in Table II. Articles that included multiple subtypes of CVD (eg, coronary heart disease [CHD] and stroke) in the outcome without estimating the association for each subtype of CVD separately were classified as having a CVD mixed definition outcome and were included in this review. Studies that only included as the main outcome CVD risk factors, such as hypertension or diabetes, were not included in this review.

Table II.

Description of adulthood clinical and subclinical CVD outcomes included in the literature review

Characteristics Description Common clinical presentation

Types of clinical CVD
 CHD also known as ischemic heart disease, coronary artery disease Reduced blood flow to the heart due to narrowing or obstruction of the coronary arteries (atherothrombosis) Myocardial infarction, angina, sudden cardiac death
 Stroke Reduced blood flow to the brain due to a blockage or rupture of the arteries supplying the brain Ischemic stroke, hemorrhagic stroke, transient ischemic attack
 Heart failure Inability of the heart to supply body’s circulatory needs, commonly due to heart muscle pump dysfunction or inadequate relaxation Congestive heart failure - syndrome manifested by shortness of breath, decreased exertional tolerance, and/or peripheral edema
Measurement methods
 Arterial stiffness Reduced elasticity of the large arteries Pulse wave velocity - speed that systolic BP wave travels through the vascular system body.
Distensibility and compliance - measures of volume and pressure in an artery during heart muscle contraction
 Arterial wall thickness Thickening of the large arterial walls, tracks the presence and progression of atherosclerosis cIMT, the thickness of innermost 2 layers of the wall of the artery, where atherosclerosis develops
 Arterial calcification Build-up of calcium in the large arteries, marker of atherosclerosis Coronary artery calcium scan determines the area and density of calcium deposits, which correlates with overall coronary plaque burden
 Endothelial dysfunction Ability of the small arteries to dilate and constrict properly Flow mediated dilation - measures the ability of the artery to dilate as blood flow increases after ischemia
 LV structure and function Enlarged mass and thickness of the walls of the left ventricle (hypertrophy) and reduced volume of blood pumped from the left ventricle (ejection fraction) are subclinical signs of heart failure Echocardiography - produces images of the left ventricle to measure:
LV mass,
LV hypertrophy,
Relative wall thickness,
LV ejection fraction

Titles and abstracts were reviewed to assess for the defined eligibility criteria. After review, full-text was retrieved for 884 articles. Two independent reviewers screened all full-text articles to ensure all eligibility criteria were met. Inter-rater agreement of this screening was high (Cohen K = 0.89). A third reviewer resolved discrepancies for the 34 articles that were left unresolved by the initial review. Ultimately, 210 articles were included in the review (Figure 1; available at www.jpeds.com).

Figure 1.

Figure 1.

The CONSORT diagram illustrates the review search and extraction process, from the initial database search to the studies included in the final qualitative analysis.

Results

A listing of all articles included in this review is available in Table III (available at www.jpeds.com). This table includes the basic study characteristics of study cohort, sample size, exposure, outcome, and main finding; a listing of any subgroup analyses by age, sex, and race/ethnicity that were reported in the article; and 3 study quality indicators, namely, self-reported or objective exposure and outcome measurements, and type of outcome analysis. Figure 2 is the corresponding heat map by childhood risk factor and adulthood outcome, color coded by number of publications.

Table III.

Listing of all articles described and cited in the main text

References Year Study cohort Sample size Exposure(s) measured in childhood Type of exposure measurement (objective vs self-reported) Outcome(s) measured in adulthood Type of outcome measurement (objective vs self-reported) Type of outcome analysis Main finding(s) Population subgroup analyses
Age group Sex Race/ ethnicity

Ceponiene et al7 2015 Kaunas Cardiovascular Risk Cohort study 380 BP, adiposity Objective cIMT arterial stiffness Objective Continuous outcome Higher BP and BMI associated with thicker cIMT in women only higher BP and BMI null association with PWV, both sexes X
Yan et al8 2017 Beijing Blood Pressure Cohort 1252 BP adiposity Objective cIMT arterial stiffness Objective Categorical outcome Higher SBP and BMI associated with thicker cIMT, both sexes higher SBP associated with greater PWV, both sexes BMI null association with PWV, both sexes X
Ferreiraet al9 2004 Amsterdam Growth and Health Longitudinal Study 159 Adiposity Objective cIMT arterial stiffness Objective Categorical outcome Higher BMI associated with thicker cIMT
BMI null association with PWV no differences by sex
X
Huynh et al10 2013 Childhood Determinants of Adult Health (CDAH) 2328 Adiposity Objective cIMT arterial stiffness Objective Continuous outcome Higher BMI associated with thicker cIMT
BMI null association with PWV no differences by sex
X
Ferreira et al11 2012 Amsterdam Growth and Health Longitudinal Study 373 BP adiposity Objective Arterial stiffness Objective Continuous outcome Highest tertile arterial stiffness had greater mean SBP, and greater mean BMI
Juonala et al12 2005 The Cardiovascular Risk in Young Finns Study 2255 BP adiposity multiple risk factors Objective Arterial stiffness Objective Continuous outcome Higher SBP and skinfold thickness associated with reduced arterial compliance greater number of risk factors associated with reduced arterial compliance
Vianna et al13 2014 Pelotas (Brazil) Birth Cohort Study 3701 Breastfeeding, birthweight, adiposity Self-reported Arterial stiffness Objective Continuous outcome Null association between breastfeeding or birthweight and PWV higher relative weight gain associated with greater arterial stiffness
Su et al14 2014 YOung TAiwanese Cohort (YOTA) Study 789 Adiposity Objective cIMT Objective Categorical outcome Childhood overweight and obesity associated with high cIMT
Hao et al15 2018 Georgia Stress and Heart study 626 Adiposity Objective LV cIMT structure and function Objective Continuous outcome Higher BMI groups associated with thicker cIMT and greater LV mass index
Raitakari et al16 2003 The Cardiovascular Risk in Young Finns Study 2229 Lipids BP adiposity tobacco exposure multiple risk factors Objective cIMT Objective Continuous outcome Greater LDL-C, SBP, BMI, smoking, and number of risk factors present was associated with thicker cIMT in men and women, when stratified by age groups 39 years and 12–18 years, only significant in 1218 years X X
Oren et al17 2003 Atherosclerosis Risk in Young Adults (ARYA) 750 Adiposity Objective cIMT Objective Continuous outcome A 1-SD increase in BMI associated with thicker cIMT
Juonala et al18 2011 Combined cohort of Bogalusa Heart Study, Muscatine Heart Study, Childhood Determinants of Adult Health, and Cardiovascular Risk in Young Finns Study 6328 Adiposity Objective cIMT Objective Event rate Overweight/obese associated with thicker cIMT as compared with normal weight no differences by sex X
Li et al19 2003 Bogalusa Heart Study 486 Adiposity BP lipids Objective cIMT Objective Categorical outcome Higher LDL-C and BMI associated with high cIMT; null association for SBP, HDL-C, triglycerides
Koskinen et al20 2018 combined cohort of Bogalusa Heart Study, the Insulin Study, Childhood Determinants of Adult Health, and Cardiovascular Risk in Young Finns Study 2893 Adiposity BP lipids Objective cIMT Objective Event rate Prehypertension, hypertension, overweight, obesity, borderline high LDL- cholesterol , high LDL-cholesterol and borderline low HDL-cholesterol associated with thicker cIMT; triglycerides not associated with cIMT
Juonala et al21 2010 Combined cohort of Bogalusa Heart Study, Muscatine Heart Study, Childhood Determinants of Adult Health, and Cardiovascular Risk in Young Finns Study 4380 Adiposity BP lipids multiple risk factors Objective cIMT Objective Categorical outcome Higher BMI, SBP associated with thicker cIMT; higher total cholesterol and number of risk factors only associated with thicker cIMT in exposure age 9–18; no association for triglycerides no sex differences X X
Juonala et al22 2010 Cardiovascular Risk in Young Finns Study 1809 Adiposity lipids physical activity diet multiple risk factors Objective cIMT Objective Continuous outcome Low HDL-C, obesity, low physical activity, infrequent fruit consumption, and number of risk factors associated with thicker cIMT; no association for LDL-C or triglycerides no sex differences X
Juonala et al23 2006 Cardiovascular Risk in Young Finns Study 2260 Adiposity Objective cIMT Objective Continuous outcome Overweight/obese associated with thicker cIMT as compared with normal weight
Freedman et al24 2004 Bogalusa Heart Study 513 Adiposity Objective cIMT Objective Continuous outcome Higher BMI associated with thicker cIMT, more strongly associated among women than men, and among White subjects than Blacks, and among ages 15–18 years at exposure as compared with younger ages X X X
Koskinen et al25 2014 Cardiovascular Risk in Young Finns Study 1617 Adiposity MetS Objective cIMT Objective Event rate Overweight/obese and MetS associated with thicker cIMT
Menezes et al26 2016 Bogalusa Heart Study 3264 Adiposity Objective cIMT Objective Continuous outcome Higher BMI associated with thicker cIMT no sex differences
Davis et al27 2001 Muscatine Heart Study 725 Adiposity Lipids Objective cIMT Objective Categorical outcome Higher BMI associated with thicker cIMT in women only higher LDL associated with thicker cIMT in both men and women X
Johnson et al28 2014 MRC National Survey of Health and Development Study 1273 Adiposity Objective cIMT Objective Categorical outcome Higher BMI associated with thicker cIMT in males only, and only at exposure ages 4 and 20 X X
Charakida et al29 2014 MRC National Survey of Health and Development Study 1273 Adiposity Objective cIMT Objective Continuous outcome Overweight/obese not associated with thicker cIMT
Sabo et al30 2014 Fels Longitudinal Study 697 Adiposity BP Objective LV structure and function Objective Continuous outcome Higher BMI associated with greater LV mass in both men and women, but not associated with wall thickness
BP not associated with LV mass or thickness
X
Yang et al31 2017 Childhood Determinants of Adult Health 8498 Adiposity Objective LV structure and function Objective Continuous outcome Higher BMI associated with worse cardias function
Hardy et al32 2016 MRC National Survey of Health and Development Study 1617 Birth weight adiposity Objective LV structure and function Objective Continuous outcome Birthweight not associated with LV mass no sex differences higher BMI associated with higher LV mass X
Li et al33 2004 Bogalusa Heart Study 467 Adiposity Objective LV structure and function Objective Continuous outcome Higher BMI associated with greater LV mass, stronger association in Blacks as compared with Whites X
Tapp et al34 2014 Childhood Determinants of Adult Health 181 Adiposity Objective LV structure and function Objective Continuous outcome Higher BMI associated with greater LV mass no sex differences X
Lai et al35 2014 Bogalusa Heart Study 1061 Adiposity BP Objective LV structure and function Objective Continuous outcome Higher SBP and BMI associated with greater LV mass
Yan et al36 2017 Beijing Blood Pressure Cohort 1256 Adiposity BP Objective LV structure and function Objective Categorical outcome Higher SBP and BMI associated with LV hypertrophy
Zhang et al37 2017 Bogalusa Heart Study 710 Adiposity Objective LV structure and function Objective Categorical outcome Higher BMI associated with greater LV mass
Sivanandam et al38 2006 Fifth- to eighth-grade students in the Minneapolis and St. Paul, Minnesota, public schools with top 15% BP 132 Adiposity Objective LV structure and function Objective Continuous outcome Higher BMI associated with greater LV mass
Toprak et al39 2008 Bogalusa Heart Study 824 Adiposity BP Objective LV structure and function Objective Categorical outcome Higher BMI and DBP associated with LV hypertrophy, association stronger in Blacks as compared with Whites X
Mahoney et al40 1996 Muscatine Heart Study 384 Adiposity BP lipids Objective Coronary artery calcification Objective Categorical outcome Higher BMI and SBP, and lower HDL-C associated with presence of coronary artery calcification no sex differences X
Berenson et al41 2016 Bogalusa Heart Study 5991 Adiposity BP Objective Clinical CVD: CHD Objective Categorical outcome Higher BMI and BP associated with greater CHD death
Lawlor et al42 2006 Combined cohort of the Boyd- Orr, Christ’s Hospital, Glasgow Alumni studies 14 561 Adiposity Objective Clinical CVD: CHD clinical CVD: stroke Objective Time to event Higher BMI associated with greater rate of CHD death no association with rate of stroke death no sex differences X
Andersen et al43 2010 Danish and Finnish individuals born 1924–1976 216 771 Birth weight adiposity Objective Clinical CVD: CHD Objective Time to event Low birthweight and higher BMI associated with higher risk of CHD
Falkstedt et al44 2007 Swedish military conscription between 1949 and 1951 49 321 Adiposity Objective Clinical CVD: CHD Objective Time to event Higher BMI associated with greater risk of CHD and stroke study sample includes men only X
Eriksson et al45 1999 Men who were born at the Helsinki University Central Hospital, 1924–1933 3641 Birth weight adiposity Objective Clinical CVD: CHD Objective Time to event Lower birthweight, higher BMI, and faster change in BMI across childhood associated with greater risk of CHD death study sample includes men only X
Baker et al46 2007 Copenhagen schoolchildren born from 1930 to 1976 289 044 Adiposity Objective Clinical CVD: CHD Objective Time to event Higher BMI associated with greater CHD risk; stronger associations for women vs men and those who had high BMI at age 13 vs age 7 years X X
Crump et al47 2017 Swedish military conscripts, 1969–1997 1 547 407 Adiposity Objective Clinical CVD: CHD Objective Time to event Overweight or obese associated with increased risk of CHD study sample includes men only X
Must et al48 2012 Third Harvard Growth Study 1877 Adiposity Objective Clinical CVD: CHD Objective Time to event Overweight associated with increased risk of CHD, among men only X
Osler et al49 2009 Men born in Copenhagen, Denmark in 1953 9143 Birth weight adiposity Objective Clinical CVD: CHD Objective Time to event Low birthweight and higher BMI associated with higher risk of CHD study sample includes men only X
Lawlor et al50 2005 Aberdeen Children of the 1950’s Study 11 106 Adiposity Objective Clinical CVD: CHD clinical CVD: stroke Objective Time to event Higher BMI not associated with CHD obesity associated with increased risk of stroke no sex differences X
Park et al51 2013 Three British birth cohorts, born in 1946,1958 and 1970 11 447 Adiposity Objective Clinical CVD: CHD Self-reported Categorical outcome Overweight not associated with risk of CHD
Gjaerde et al52 2017 Copenhagen schoolchildren born from 1930–1987 307 677 Adiposity Objective Clinical CVD: stroke Objective Time to event Higher BMI and faster weight gain during childhood associated with risk of stroke no sex differences X
Ohlsson et al53 2017 Men born in Gothenburg, Sweden from 1945–1961 37 669 Adiposity Objective Clinical CVD: stroke Objective Time to event Faster weight gain in childhood associated with increased risk of stroke study sample includes men only X
Crump et al54 2016 Swedish military conscripts, 1969–1997 1 547 294 Adiposity Objective Clinical CVD: stroke Objective Time to event Overweight or obese associated with increased risk of stroke study sample contains men only X
Hogstrom et al55 2015 Swedish military conscription between 1969–1986 811 579 Adiposity diabetes Objective Clinical CVD: stroke Objective Time to event Higher BMI and type 2 diabetes associated with increased risk of stroke study sample contains men only X
Crump et al56 2017 Military conscripts in Sweden during 1969–1997 1 330 610 Adiposity Objective Clinical CVD: heart failure Objective Time to event Higher BMI associated with higher risk of heart failure study sample contains men only X
Rosengren et al57 2017 Military conscripts in Sweden during 1968–2005 1 610 437 Adiposity Objective Clinical CVD: heart failure Objective Time to event Higher BMI associated with higher risk of heart failure study sample contains men only X
Twig et al58 2017 military conscripts in ISRAEL during 1967–2010 2 294 139 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Higher BMI associated with higher risk of CVD no sex differences X
Bjorge et al59 2008 National tuberculosis screening in Norway, 1963–1975 226 678 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Obesity associated with greater risk of CVD death no sex differences X
Twig et al60 2016 Military conscripts in Israel during 1967–2010 2 298 130 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Higher BMI associated with higher risk of CVD death
Batty G et al61 2016 1947 Scottish Mental Survey 3839 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Higher weight at age 11 years was associated greater CVD mortality
Gunnell et al62 1998 Boyd Orr cohort 2399 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Obesity associated with greater risk of CVD death stronger association in exposure age >8 years than younger than 8 years X
Imai et al63 2014 Icelanders born between 1921 and 1935 and living in Reykjavik 1924 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Faster BMI velocity associated with greater risk of CVD mortality no sex differences X
Zheng et al64 2017 Combined cohort of the Nurses’ Health Study and the Health Professionals Follow-up Study 122 498 Adiposity Self-reported Clinical CVD: mixed definition Self-reported Time to event Those who had higher BMI in childhood had greater risk of CVD, stronger associations for women as compared with men X
Must et al65 1992 Third Harvard Growth Study 508 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Higher BMI associated with greater CVD mortality risk, among men only X
Morrison et al66 2012 Princeton Lipid Research Clinics Follow-Up Study 770 Adiposity Objective Clinical CVD: mixed definition Self-reported Categorical outcome High BMI associated with higher CVD risk
Furer et al67 2018 Military conscripts in Israel during 1967–2010 2 294 139 Adiposity Objective Clinical CVD: mixed definition Objective Time to event Higher BMI associated with higher CVD mortality no sex differences X
Bhuiyan et al68 2010 Bogalusa Heart Study 538 Birth weight Objective Arterial stiffness Objective Continuous outcome Low birthweight associated with reduced arterial compliance X X
Rich-Edwards et al69 1997 Nurses’ Health Study 70 297 Birth weight Self-reported Clinical CVD: mixed definition Objective Time to event Low birth weight associated with increased risk of nonfatal CVD study sample included women only X
Lawani et al70 2014 Atherosclerosis Risk in Communities 10 132 Birth weight Self-reported Clinical CVD: mixed definition Objective Time to event Low birth weight associated with higher risk of atrial fibrillation
Larsson et al71 2015 Swedish Inpatient Register cohort 53 005 Birth weight Self-reported Clinical CVD: mixed definition Objective Time to event Both low birth weight and high birth weight associated with increased risk of atrial fibrillation, among men only X
Baker J et al72 2008 Danish schoolchildren born from 1936–1979 216 464 Birth weight Objective Clinical CVD: mixed definition Objective Time to event Both low and high birth weight associated with increased CVD mortality no sex differences X
Lawlor et al73 2004 British women’s heart and health study 1394 Birth weight Self-reported Clinical CVD: CHD Self-reported Categorical outcome Low birth weight was associated with greater CHD risk study sample included women only X
Lawlor et al74 2005 Aberdeen Children of the 1950’s Study 10 803 Birth weight Objective Clinical CVD: CHD Objective Time to event Low birth weight was associated with greater CHD risk
Oberg et al75 2011 Population-based cohort of like- sexed twinswith known zygosity born in Sweden from 1926 to 1958 23 689 Birth weight Objective Clinical CVD: mixed definition Objective Categorical outcome Birth weight was found to be inversely associated with risk of CVD within dizygotic but not monozygotic twin pairs
Syddall et al76 2005 Hertfordshire Cohort Study 37 615 Birth weight Objective Clinical CVD: mixed definition Objective Time to event Each SD lower birth weight associated with increased risk of CVD mortality no sex differences X
Frankel et al77 1996 Caerphilly Heart Disease Study 1258 Birth weight Self-reported Clinical CVD: CHD Self-reported Categorical outcome Low birth weight associated with higher risk of CHD when adult BMI is also elevated study sample includes men only X
Rajaleid et al78 2008 Uppsala Birth Cohort 11 822 Birth weight Objective Clinical CVD: CHD Objective Time to event Low birth weight associated with higher risk of CHD mortality, only present in higher social class men X
Eriksson et al79 2001 Helsinki Birth Cohort 4630 Birth weight Objective Clinical CVD: CHD Objective Time to event Lower birthweight associated with higher risk of CHD study sample includes men only X
Osmond et al80 1993 Hertfordshire Cohort Study 4630 Birth weight Objective Clinical CVD: mixed definition Self-reported Categorical outcome Low birthweight associated with higher risk of CVD no sex differences X
Johnson et al81 2011 Panel Study of Income Dynamics 4387 Birth weight SES Objective Clinical CVD: mixed definition Self-reported Categorical outcome Low birth weight and childhood poverty associated with higher risk of CVD
Forsen et al82 1999 Women born in Helsinki University Central Hospital during 1924–33 3447 Birth weight Objective Clinical CVD: mixed definition Objective Time to event Both low birth weight associated with increased risk of CHD study sample includes only women X
Osmond et al83 2007 Helsinki Birth Cohort 12 439 Birth weight adiposity Objective Clinical CVD: stroke Objective Time to event Low birth weight and slow growth in first 2 years after birth associated with increased risk of stroke no sex differences X
Koupilova et al84 1999 Uppsala Birth Cohort 1334 Birth weight Objective Clinical CVD: mixed definition Objective Time to event Low birth weight associated with higher CVD mortality study sample includes only men X
Rich-Edwards et al85 2005 Nurses’ Health Study 66 111 Birth weight Self-reported Clinical CVD: CHD clinical CVD: stroke Objective Time to event Low birth weight associated with higher risk of CHD, but no association with stroke study sample includes onlywomen X
Arnold et al86 2016 Prospective cohort in a remote Indigenous Australian community 852 Birth weight Objective Clinical CVD: mixed definition Objective Time to event Low birth weight associated with higher risk of CVD, stronger association for women as compared with men X
Zoller et al87 2015 National cohort study of individuals who were live- born in Sweden in 1973 through 1992 1 984 858 Birth weight Objective Clinical CVD: CHD Objective Time to event Low birth weight associated with higher risk of CHD
Leon et al88 1998 Uppsala Birth Cohort 14 611 Birth weight Objective Clinical CVD: CHD Objective Time to event Low birth weight associated with higher risk of CHD, among men only X
Smith et al89 2016 The Women’s Health Initiative 63 815 Birth weight Self-reported Clinical CVD: mixed definition Objective Time to event Low birth weight was associated with increased risk of CVD, associations less strong for Hispanic and African American women study sample includes onlywomen X X
Hypponen et al90 2001 Uppsala Birth Cohort 14 611 Birth weight Objective Clinical CVD: stroke Objective Time to event Low birth weight was associated with increased risk of stroke
Forsen et al91 2004 Helsinki Birth Cohort 2345 Weight gain Objective Clinical CVD: CHD Objective Time to event Lower weight gain in infancy associated with increased risk of CHD study sample included men only X
Forsen et al92 2004 Helsinki Birth Cohort 4130 Weight gain Objective Clinical CVD: CHD Objective Time to event Lower weight gain in infancy associated with increased risk of CHD study sample included women only X
Leunissen et al93 2012 PROgramming factors for GRowth And Metabolism (PROGRAM) study 323 Weight gain Self-reported cIMT Objective Continuous outcome Faster weight gain in childhood associated with thicker cIMT
Terzis et al94 2012 Cohort from Athens, Greece recruited in 1983 106 Weight gain Self-reported cIMT Objective Continuous outcome Faster weight gain in childhood associated with thicker cIMT
Chu et al95 2017 Hanzhong adolescent hypertension cohort 4623 BP Objective Arterial stiffness Objective Continuous outcome Higher SBP associated with greater arterial stiffness
Xi et al96 2017 Bogalusa Heart Study 1225 BP Objective cIMT arterial stiffness LV structure and function Objective Time to event Pediatric hypertension associated with high cIMT, greater arterial stiffness, and LV hypertrophy
Liang et al97 2014 Beijing Blood Pressure Cohort 1259 BP Objective cIMT arterial stiffness LV structure and function Objective Categorical outcome Pediatric hypertension associated with high cIMT, greater arterial stiffness, and LV hypertrophy
Li et al98 2004 Bogalusa Heart Study 835 BP Objective Arterial stiffness Objective Categorical outcome Higher SBP associated with greater arterial stiffness
Aatola et al99 2017 Cardiovascular Risk in Young Finns Study 1540 BP Objective arterial stiffness Objective Event rate High BP not associated with arterial stiffness, unless adult BP levels were also high; no sex differences X
Aatola et al100 2013 Cardiovascular Risk in Young Finns Study 1241 BP Objective Arterial stiffness Objective Categorical outcome High BP associated with greater arterial stiffness
Vos et al101 2003 Atherosclerosis Risk in Young Adults (ARYA) 750 BP Objective cIMT Objective Continuous outcome Higher BP associated with thicker cIMT
Hao et al102 2017 Georgia Stress and Heart study 551 BP Objective cIMT LV structure and function Objective Continuous outcome Higher BP associated with thicker cIMT and greater LV mass no sex differences X
Juhola et al103 2013 International Childhood Cardiovascular Cohort Consortium 4210 BP Objective cIMT Objective Event rate High BP associated with thicker cIMT
Hartiala et al104 2012 Young Finns 589 BP lipids Objective Higher SBP and LDL- C associated with coronary artery calcification Objective Categorical outcome Higher SBP associated with presence of coronary artery calcification
Magnussen et al105 2014 prospective cohort of 181 individuals 181 BP lipids Objective LV structure and function Objective Continuous outcome Higher triglycerides and higher DBP associated with greater LV mass
Sundstrom et al106 2011 Swedish military conscription between 1969–1995 1207329 BP Objective Clinical CVD: mixed definition Objective Time to event BP associated with increased CVD study sample includes men only X
Silventoinen et al107 2008 Swedish military conscription between 1969 and 1994 1 145 758 BP Objective clinical CVD: mixed definition Objective Time to event BP associated with increased CVD across levels of BMI, strongest in obese study sample includes men only X
Leiba et al108 2016 Israeli military conscription between 1967–2010 2 298 130 BP Objective Clinical CVD: mixed definition Objective Time to event Pediatric hypertension associated with increased risk of CVD mortality
Erlingsdottir et al109 2010 Children admitted to Landspitali University Hospital in Iceland for elective surgical procedures between 19501967 126 BP Objective Clinical CVD: CHD Self-reported Categorical outcome Pediatric hypertension associated with increased risk of CHD
Juonala et al110 2008 Cardiovascular Risk in Young Finns Study 2265 lipids Multiple risk factors Objective cIMT) Objective Continuous outcome Type IIb dyslipidemia associated with thicker cIMT higher number of risk factors associated with thicker cIMT
Li et al111 2007 Bogalusa Heart Study 868 Lipids Objective cIMT Objective Continuous outcome Differences by race and sex in the association of lipids and thicker cIMT: White men, LDL-C and triglycerides significant; White women, LDL-C significant ; Black women, LDL-C significant; Black men, no significant association for any lipid levels X X
Magnussen et al112 2009 Combined cohort of Bogalusa Heart Study, Childhood Determinants of Adult Health, and Cardiovascular Risk in Young Finns Study 1711 Lipids Objective cIMT Objective Categorical outcome Dyslipidemia associated with thicker cIMT
Frontini et al113 2008 Bogalusa Heart Study 437 lipids Objective cIMT Objective Categorical outcome Higher LDL-C associated with high cIMT; no association for HDL-C and triglycerides
Morrison et al114 2012 Princeton Lipid Research Clinics Follow-Up Study 909 Lipids Objective clinical CVD: mixed definition Self-reported Categorical outcome High triglycerides associated with increased risk of CVD
Morrison et al115 2009 Princeton Lipid Research Clinics Follow-Up Study 808 Lipids Objective Clinical CVD: mixed definition Self-reported Time to event High triglycerides associated with increased risk of CVD
Yajnik et al116 2015 Pune Children’s Study 357 Glycemic indicators Objective cIMT Objective Continuous outcome Higher fasting glucose associated with thicker cIMT
McCarron et al117 2001 Glasgow Alumni study 8354 Tobacco exposure Objective Clinical CVD: mixed definition Objective Time to event All categories of smoking exposure associated with higher risk CVD, with significant linear trend for amount of smoking study sample included men only X
Whitley et al118 2012 Harvard Alumni Health Study 28 236 Tobacco exposure Objective Clinical CVD: mixed definition Objective Time to event Smoking associated with higher risk of CVD mortality study sample included men only X
Choi et al119 2017 National Health Interview Survey linked to the National Death Index 90 278 Tobacco exposure Self-reported Clinical CVD: mixed definition Objective Categorical outcome Current and former smokers who started smoking at or before age 16 had higher risk of CVD X
Geerts et al120 2008 Atherosclerosis Risk in Young Adults (ARYA) 732 Tobacco exposure Self-reported cIMT Objective Continuous outcome In utero parental smoking exposure associated with thicker cIMT
Gall et al121 2014 Cardiovascular Risk in Young Finns Study 1375 Tobacco exposure Self-reported cIMT Objective Continuous outcome Greater exposure to parental smoking was associated with thicker cIMT
West et al122 2015 Cardiovascular Risk in Young Finns Study 2448 Tobacco exposure Self-reported coronary artery calcification Objective Event rate Greater exposure to parental smoking was associated with higher risk of presence of coronary artery calcification
Palve et al123 2014 Cardiovascular Risk in Young Finns Study 2416 Physical activity Objective Arterial stiffness Objective Continuous outcome Greater physical activity associated with lower arterial stiffness, among men only X
van de Laar et al124 2011 Amsterdam Growth and Health Longitudinal Study 373 Physical activity Objective Arterial stiffness Objective Continuous outcome Vigorous activity associated with lower arterial stiffness, no associations for light/ moderate activity
van de Laar et al125 2010 Amsterdam Growth and Health Longitudinal Study 373 Physical activity Objective Arterial stiffness Objective Continuous outcome Vigorous activity associated with lower arterial stiffness
Ried-Larsen et al126 2015 European Youth Heart Study, Danish participants only 277 Physical activity Objective Arterial stiffness Objective Continuous outcome Higher physical activity levels associated with lower arterial stiffness
Drca et al127 2014 Population-based cohort of Swedish men 44 410 Physical activity Objective clinical CVD: mixed definition Objective Time to event No association between physical activity and atrial fibrillation study sample included men only X
Aatola et al128 2010 Cardiovascular Risk in Young Finns Study 1622 Diet Objective Arterial stiffness Objective Continuous outcome Higher fruit and vegetable intake associated with lower arterial stiffness
van de Laar et al129 2012 Amsterdam Growth and Health Longitudinal Study 373 Diet Self-reported Arterial stiffness Objective Continuous outcome Lower intake of fiber associated with lower arterial stiffness
van de Laar et al130 2013 Amsterdam Growth and Health Longitudinal Study 373 Diet Self-reported Arterial stiffness Objective Continuous outcome Greater adherence to the Mediterranean diet pattern associated with lower arterial stiffness
McCourt et al131 2014 Northern Ireland Young Hearts Project 487 Diet Self-reported Arterial stiffness Objective Continuous outcome No association between adherence to Mediterranean diet pattern and arterial stiffness
Kaikkonen et al132 2013 Cardiovascular Risk in Young Finns Study 823 Diet Self-reported cIMT Objective Continuous outcome Saturated, monounsaturated, and polyunsaturated fat consumption associated with thicker cIMT, but omega-3 fatty acid consumption associated with less thick cIMT, among women only X
Mikkila et al133 2009 Cardiovascular Risk in Young Finns Study 785 Diet Self-reported cIMT Objective Continuous outcome Traditional Finnish dietary pattern (characterized by intake of rye, potatoes, butter, milk, sausages, and coffee) was associated with thicker cIMT, among men only X
van der Pols et al134 2009 Boyd Orr cohort 4374 Diet Self-reported clinical CVD: mixed definition Objective Time to event Diet high in calcium associated with lower risk of stroke mortality, no association with CHD mortality
Ness et al135 2005 Boyd Orr cohort 1234 Diet Self-reported clinical CVD: stroke Objective Time to event Higher intake of vegetables and lower intake of fish associated with lower risk of stroke death
Jarvisalo et al136 2009 Cardiovascular Risk in Young Finns Study 3596 Breastfeeding Self-reported Endothelial function cIMT Objective Continuous outcome Breastfeeding in infancy associated with higher endothelial function, among men only breastfeeding in infancy not associated with cIMT X
Martin et al137 2005 Boyd Orr cohort 362 Breastfeeding Self-reported cIMT Objective Continuous outcome Breastfeeding in infancy associated with less thick cIMT
Rich-Edwards et al138 2004 Nurses’ Health Study 87252 Breastfeeding Self-reported Clinical CVD: CHD clinical CVD: stroke Objective Time to event Breastfeeding in infancy not associated with CHD or stroke
Martin et al139 2004 Boyd Orr cohort 3555 Breastfeeding Self-reported Clinical CVD: mixed definition Objective Time to event Breastfeeding in infancy not associated with CVD mortality
Fall et al140 1992 Hertfordshire Cohort Study 5718 Breastfeeding Self-reported Clinical CVD: CHD Objective Event rate Breastfeeding in infancy associated with CHD, but only among those who had weaned before 1 year study sample included men only X
Kivimaki et al141 2005 Cardiovascular Risk in Young Finns Study 2290 SES Self-reported cIMT Objective Continuous outcome No association between SES and cIMT
Kivimaki et al142 2006 Cardiovascular Risk in Young Finns Study 1922 SES Self-reported cIMT endothelial function Objective Continuous outcome No association between SES and cIMT
No association between SES and flow-mediated dilation
No sex differences
X
Laitinen et al143 2017 Cardiovascular Risk in Young Finns Study 1871 SES Self-reported LV structure and function Objective Continuous outcome Low family SES was associated with higher LV mass
Smith et al144 1998 cohort of men aged 35–64 who were recruited from workplaces in the west of Scotland between 1970 and 1973 5766 SES Self-reported Clinical CVD: mixed definition Objective Time to event Father’s occupation status associated with risk of CHD and stroke mortality
Kittleson et al145 2006 John Hopkins Precursors Study 1131 SES Self-reported Clinical CVD: CHD Objective Time to event Low parental SES associated with increased incidence of CHD
Lynch et al146 1994 Kuopio Ischaemic Heart Disease Risk Factor Study 2636 SES Self-reported Clinical CVD: mixed definition Objective Time to event Low parental SES associated with increased incidence of CVD only if adult SES also low
Study sample included men only
X
Gliksman et al147 1995 Nurses’ Health Study 117 006 SES Self-reported Clinical CVD: mixed definition Objective Time to event Low childhood SES associated with higher risk of CVD Study sample included women only X
Heshmati et al148 2017 Uppsala Birth Cohort 10 593 SES Self-reported Clinical CVD: stroke Objective Time to event Social mobility was associated with risk of stroke, among women only X
Lawlor et al149 2006 Aberdeen Children of the 1950’s Study 12 150 SES Self-reported clinical CVD: mixed definition Objective Time to event Father’s occupation status associated with risk of CHD and stroke mortality
Melchior et al150 2006 GAZEL Cohort Study 20 570 SES Self-reported clinical CVD: mixed definition Objective Time to event Low SES only associated with higher risk of CVD if adult SES was also low
Kamphuis et al151 2012 GLOBE study 11 701 SES Self-reported Clinical CVD: mixed definition Objective Time to event Lowest group of childhood SES associated with higher risk of CVD mortality
Osler et al152 2003 Project Metropoli 11 376 SES Self-reported Clinical CVD: mixed definition Objective Time to event Low SES in early life was associated with higher CVD mortality risk
Anderson et al153 2018 Avon Longitudinal Study of Parents and Children 4957 Psychosocial adversity Self-reported cIMT
arterial stiffness
Objective Continuous Cumulative psychosocial adversity in childhood not associated with cIMT or arterial stiffness;
Study sample included women only
X
Rotar et al154 2015 survivors of the Leningrad siege with age-sex matched individuals 356 psychosocial adversity Self-reported LV structure and function Objective Continuous outcome Exposure to famine not associated with LV mass
Thurston et al155 2014 Study ofWomen’s Health Across the Nation 1369 Psychosocial adversity Self-reported cIMT Objective Continuous outcome A history of childhood sexual abuse, but not childhood physical abuse was associated with thicker cIMT
Study sample included women only
X
Loucks et al156 2014 Coronary Artery Risk Development in Young Adults (CARDIA) Study 2659 Psychosocial adversity Self-reported cIMT Objective Continuous outcome Adverse childhood family psychosocial environment associated with thicker cIMT in White men and women, but not in Black men or White X X
Cruickshank et al157 2016 The Determinants of Adolescent, Now Young Adult, Social Wellbeing, and Health Longitudinal Study 666 Psychosocial adversity Self-reported Arterial stiffness Objective Continuous outcome Greater perceived racism associated with greater arterial stiffness
Juonala et al158 2016 Cardiovascular Risk in Young Finns Study 311 Psychosocial adversity Self-reported Coronary artery calcification Objective Categorical outcome Favorable childhood psychosocial environment associated with lower likelihood of the presence of coronary artery calcification
Head et al159 2008 individuals born in Guernsey Island 1923–1937, later occupied by Germans during WWII 873 Psychosocial adversity Self-reported Clinical CVD: mixed definition Objective Time to event Exposure to war-related occupation associated with higher risk of CVD
Korkeila et al160 2010 Health and Social Support Study 23 916 Psychosocial adversity Self-reported Clinical CVD: mixed definition Objective Time to event Greater number of adversities associated with greater risk of CVD, among women only X
Halonen et al161 2015 Finnish Public Sector Study 37 699 Psychosocial adversity Self-reported Clinical CVD: mixed definition Objective Time to event Higher childhood adversity only associated with greater CVD risk if adult neighborhood disadvantage was also low
Morton et al162 2014 National Survey of Midlife Development in the United States 3032 Psychosocial adversity Self-reported Clinical CVD: CHD Self-reported Categorical outcome Higher levels of childhood misfortune associated with greater risk of CHD
Woo et al163 2010 elderly individuals in Hong Kong attending health check 3732 Psychosocial adversity Self-reported Clinical CVD: CHD Self-reported Categorical outcome Exposure to famine associated with greater risk of CHD
Dong et al164 2004 Kaiser Permanente’s Health Appraisal Center 17 337 Psychosocial adversity Self-reported Clinical CVD: CHD Self-reported Categorical outcome Number of childhood adverse childhood experiences associated with greater risk of CHD
Hollingshaus et al165 2015 Utah Population Database 663 729 Psychosocial adversity Self-reported Clinical CVD: mixed definition Objective Time to event Early-life parental death was associated with a higher risk of CVD mortality No sex differences X
Robertson et al166 2017 Swedish military conscription between 1968–2005 1 784 450 Psychosocial adversity Self-reported Clinical CVD: heart failure Objective Time to event Low stress resilience associated with higher risk of heart failure
Study sample included men only
X
Garad et al167 2017 National Population Health Survey 4048 Psychosocial adversity Self-reported clinical CVD: mixed definition Self-reported Categorical outcome Greater number of adversities associated with greater risk of CVD, among women only X
Bergh et al168 2014 Swedish military conscription 237 879 Psychosocial adversity Self-reported Clinical CVD: stroke Objective Time to event Lower stress resiliency group associated with greater risk of stroke
Study sample included men only
X
Shi et al169 2018 China Health and Retirement Longitudinal Study 5772 Psychosocial adversity Self-reported Clinical CVD: mixed definition Self-reported Categorical outcome Exposure to famine in childhood associated with lower risk of CVD
Magnussen et al170 2012 Combined cohort of Bogalusa Heart Study and Cardiovascular Risk in Young Finns Study 1757 MetS Objective cIMT Objective Event rate Persistent MetS associated with greater risk of high cIMT
Koskinen et al171 2017 Combined cohort of Bogalusa Heart Study, Cardiovascular Risk in Young Finns Study, Minnesota Insulin Study, and Princeton Lipid Research Clinics Follow-Up Study 5803 MetS Objective cIMT Objective Categorical outcome MetS associated with greater risk of high cIMT, among exposure age groups 1118 years only No sex differences X X
Magnussen et al172 2016 Cardiovascular Risk in Young Finns Study 1453 MetS Objective cIMT Objective Categorical outcome MetS associated with greater risk of high cIMT
Magnussen et al173 2010 Combined cohort of Bogalusa Heart Study and Cardiovascular Risk in Young Finns Study 1781 MetS Objective cIMT Objective Event rate MetS associated with greater risk of high cIMT, but BMI only has the same predictive capacity
Koivistoinen et al174 2011 Cardiovascular Risk in Young Finns Study 945 MetS Objective Arterial stiffness Objective Continuous outcome MetS associated with greater arterial stiffness
DeBoer et al175 2016 Princeton Lipid Research Clinics Follow-Up Study 711 MetS Objective Clinical CVD: mixed definition Self-reported Categorical outcome MetS associated with greater risk of CVD
Morrison et al176 2007 Princeton Lipid Research Clinics Follow-Up Study 771 MetS Objective Clinical CVD: mixed definition Self-reported Categorical outcome MetS associated with greater risk of CVD
DeBoer et al177 2015 Princeton Lipid Research Clinics Follow-Up Study 341 MetS Objective Clinical CVD: mixed definition Self-reported Categorical outcome MetS associated with greater risk of CVD
Laitinen et al178 2012 Cardiovascular Risk in Young Finns Study 856 Number of risk factors Objective cIMT Objective Categorical outcome Greater number risk factors associated with greater risk for high cIMT
Laitinen et al179 2015 Cardiovascular Risk in Young Finns Study 370 Number of risk factors Objective Coronary artery calcification Objective Event rate Lower number of risk factors associated with decreased risk of presence of coronary artery calcification No sex differences X

DBP, diastolic BP; SBP, systolic BP; PWV, pulse wave velocity.

Figure 2.

Figure 2.

Heat map of identified articles examining childhood exposures and adulthood CVD. Each box lists the number of articles corresponding the exposure and CVD outcome pair. Yellow indicates that only null associations have been observed between the exposure and outcome. Colors deepen from light orange to red with an increasing number of articles indicating the exposure may be associated with higher CVD outcome risk. Colors deepen from light green to dark green with an increasing number of articles indicating the exposure may be associated with lower CVD outcome risk. Gray indicates that no articles examining the exposure and outcome pair were identified in this review. Articles that included multiple subtypes of CVD (eg, CHD and stroke) in the outcome without estimating the association for each subtype of CVD separately were classified as “CVD Mixed Definition”.

Adiposity

We identified 61 studies that examined the association between childhood adiposity and adulthood subclinical and clinical CVD. Almost all studies used body mass index (BMI) as the adiposity measure, but there was heterogeneity in whether BMI was analyzed continuously, categorically using percentile cut-points, or categorically using numeric cut-points.6

Subclinical CVD Outcomes.

Four articles found no significant association between childhood adiposity and adulthood arterial stiffness,710 but 2 other studies found associations between adiposity and increased arterial stiffness.11,12 One study found an association between adiposity at age 4 years and adulthood stiffness; however, this association was not found when examining adiposity at age 2 years.13

In 19 articles, childhood adiposity was associated with greater adult carotid intima-media thickness (cIMT).710,1428 Sex differences in the association were examined in 11 of these articles, 7 articles found no difference between men and women, 3 articles found the association held among women only, and 1 article found the association held among men only.710,16,18,21,22,2628 When examining the association by exposure age, there was a stronger association in adolescence (age ≥12 years) compared with earlier childhood.16,24 One article had a null finding, where overweight in early childhood (ages 2–11 years) was not associated with cIMT in older adulthood.29

The association between greater childhood adiposity and adverse adulthood left ventricular (LV) structure and function was significant across 11 articles.15,3039 One study examined the association of BMI in adolescence and presence of adult coronary artery calcification, finding a positive association.40

Clinical CVD Outcomes.

Eleven articles examined associations between childhood adiposity and adult CHD finding higher risk of CHD with each SD increase in BMI (hazard ratio range per SD, 1.05–1.22).4151 One article examined the associations by age group and found more robust associations at age 13 years as compared with age 7 years between childhood adiposity and a higher risk of adult CHD.46 Seven articles examined the associations between childhood adiposity and adulthood stroke; the hazard ratio range of higher risk of stroke with each SD increase in BMI was 1.15–1.29. Two articles found significant associations of increased adiposity with risk of adulthood heart failure.42,44,50,5257 Last, there were 10 articles that used mixed-type definitions of CVD (eg, includes both CHD and stroke combined as a single outcome); the hazard ratio range of higher risk of CVD with each SD increase in BMI was 1.09–1.21 and the hazard ratio range of higher risk of CVD with childhood obesity was 2.3–3.9.5867 One article stratified by childhood age group, finding stronger associations with CVD among children aged 8–14 years as compared with 2–8 years.62

Birthweight

Low birthweight is also a contributor to the pathogenesis of CVD. We found 28 articles examining associations of birthweight with adulthood subclinical and clinical CVD, all adjusted for gestational age. Three articles specifically examined subclinical CVD: 1 article found low birthweight (<2500 g) to be associated with greater arterial stiffness, and the other 2 found no association between low birthweight and either arterial stiffness or LV mass.13,32,68 The associations between lower birthweight and higher risk of clinical CVD were consistent across 25 studies and multiple CVD outcomes, including CHD, stroke, and CVD mortality; the hazard ratio range of higher risk of CVD with each SD decrease in birthweight was 1.11–1.43 and the hazard ratio range of higher risk of CVD with low birthweight was 2.2–3.6.43,45,49,6990

Change in Adiposity Across Childhood

We identified 19 articles examining how change in adiposity across childhood may affect risk of adulthood CVD. Four studies examined the velocity of weight gain during early childhood, finding that lower levels of weight gain through age 2 years were associated with higher risk of CVD.79,83,91,92 However, after infancy, faster childhood weight gain was associated with a greater risk of CVD.45,52,53,63,79,93 Further, individuals who had low birthweight and then gained weight rapidly in childhood were at the greatest risk for adult CVD.45,79,93,94

Blood Pressure

We identified 29 articles examining childhood blood pressure (BP) and adult CVD outcomes, and these articles used a mix of continuous BP measurement and dichotomous elevated/not elevated BP classification. To determine elevated BP, studies applied the pediatric hypertension guidelines in effect at the time of analysis; thus, there is heterogeneity across publication date in how elevated BP is defined.

Subclinical CVD Outcomes.

Ten articles examined childhood BP and the association with adulthood arterial stiffness. Nine of these studies found that elevated BP was associated with greater arterial stiffness.7,8,11,12,95100

The association between childhood BP and adult cIMT was measured in 11 articles. In 9 articles, there was an association between elevated BP and thicker cIMT.7,8,16,1921,96,97,101103 Five of these studies stratified the results by sex, but only 1 study found sex-specific differences with the association, present only among women.7 One study stratified by exposure age, and the association between BP and cIMT was only significant among adolescents aged 12–18 years.16 The association between childhood BP and adult coronary artery calcification was examined in 2 articles; both showed an association between elevated BP and the presence of coronary artery calcification.40,104

Eight articles examined associations between childhood BP and adulthood LV structure and function. Three articles found positive associations between BP and LV mass,35,102,105 but a fourth article found no association.30 The remaining 4 articles examined adulthood LV hypertrophy as the outcome; pediatric hypertension was associated with a higher risk of LV hypertrophy.36,39,96,97

Clinical CVD Outcomes.

Five articles examined childhood BP and adulthood CVD events.41,106109 Elevated BP was associated with greater risk of CVD; the hazard ratio range of higher risk of CVD with each SD increase in BP was 1.05–1.18 and in the 1 study that examined higher risk of CVD with a dichotomous hypertension cut-off, the hazard ratio was 1.51. One study stratified risk of CVD by childhood BMI, finding significant associations between hypertension and CVD across BMI strata that were strongest among obese children.106

Lipids

We identified 16 articles using a heterogeneous mix of total cholesterol, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and/or triglycerides as the exposure of interest, with several articles comparing the performance of these lipid measures.

Subclinical CVD Outcomes.

Ten articles established consistent findings between pediatric hyperlipidemia and adult cIMT, but there were differences by type of lipids. LDL-C was measured in 8 articles, and higher LDL-C was consistently associated with thicker cIMT.16,19,20,27,110-113 There was consistently no association between triglyceride levels and cIMT across 7 studies.16,1922,111,113 The findings on HDL-C were mixed: 3 studies found lower HDL-C associated with thicker cIMT, whereas 4 studies did not find any significant associations.16,19,20,22,111113 One article examined total cholesterol, finding a positive association with thicker cIMT.21 In 2 articles that examined pediatric lipid levels and coronary artery calcification, the presence of coronary artery calcification was association with higher LDL-C in 1 article and lower HDL-C in the other article.40,104 One article examined childhood triglyceride levels and LV mass; the association between higher triglycerides and greater LV mass was significant.105

Two studies of childhood lipid levels and adult cIMT stratified their findings by age group, and in both, the associations held for adolescents but were not significant in early childhood.16,21 In another study, stratified by race and sex, the significant association between higher childhood LDL-C cholesterol and thicker adult cIMT was present for White men, White women, and Black women, but not for Black men.111 Several studies tested for sex differences in the association between pediatric lipid levels and adult cIMT, but none were found.16,21,22,27

Clinical CVD Outcomes.

Three articles examined childhood triglyceride levels and adulthood CVD, all showing significant associations between higher triglyceride levels and a higher incidence of CVD (hazard ratio range, 5.4–6.1).66,114,115 We found no articles examining other childhood lipid measures and adult CVD outcomes in the general population.

Glycemic Indicators

We found scant research connecting childhood glycemic indicators to adulthood CVD. One study examined fasting glucose and found associations with greater cIMT, but did not find any associations between fasting glucose and adult arterial stiffness.116 In another study, type 2 diabetes in adolescence was associated with a higher risk of stroke.55

Tobacco Exposure

Assessment of tobacco exposure includes both self-smoking in adolescence, that is, personal use of tobacco cigarettes, and secondary exposure to smoking in home- and community-based environments throughout childhood and adolescence.3 We identified 4 articles examining childhood self-smoking. Cigarette smoking was associated with thicker adulthood cIMT as well as CVD incidence.16,117,118 Another study, conducted only among current and former smokers, found a higher risk of developing CVD among those who initiated smoking before age 17 years as compared with those who started at age 17 years or after.119 Additionally, 3 articles examined exposure to parental smoking, finding significant associations with thicker adulthood cIMT and carotid atherosclerotic plaque.120122 There was evidence of a dose response; the risk of thicker cIMT was higher if both parents reported smoking, and the risk of carotid plaque was lower if there was evidence of good “smoking hygiene” as demonstrated by reported parental smoking without concomitant detectable levels of serum cotinine in the child.120,122

Physical Activity

We identified 6 articles addressing childhood physical activity and risk of adulthood subclinical and clinical CVD. All but one of the studies relied on self-reported physical activity, and all studies used a continuous measure of physical activity.

Associations between childhood physical activity and adult arterial stiffness were mixed. In 1 study, greater childhood physical activity was associated with lower adulthood stiffness among men only,123 in 2 studies only vigorous physical activity was associated with lower stiffness (among both men and women), and in a fourth study both moderate and vigorous physical activity were associated with lower stiffness.124126 In 2 studies, both moderate and vigorous physical activity during childhood were associated with lower adult cIMT.22,126 Finally, 1 study on adulthood atrial fibrillation among men did not find an association between physical activity at age 15 years and later incidence of atrial fibrillation.127

Diet

Nine articles evaluated various aspects of diet quality; 3 articles focused on overall diet quality and 6 articles focused on specific food groups, such as fruits and vegetables.

Subclinical CVD Outcomes.

Four studies focused on childhood diet and its potential impact on adult arterial stiffness. In 1 study, greater intake of fruits and vegetables was associated with less arterial stiffness, and in another study, greater intake of dietary fiber was associated with less arterial stiffness.128,129 Two studies examined the Mediterranean diet score finding an association with greater adherence to the Mediterranean diet and less arterial stiffness in 1 study and no association with arterial stiffness in the other study, respectively.130,131

Another 3 studies examined the association between childhood diet and adulthood cIMT as the outcome of interest. Greater fruit consumption was associated with thinner cIMT, as was consumption of omega-3 fatty acids.22,132 In contrast, greater consumption of saturated, monounsaturated, and polyunsaturated fat was associated with thicker adulthood cIMT.132 The third study found that adherence to a traditional Finnish diet was associated with a thicker cIMT among men only, most likely attributable to high consumption of fat and sodium.133

Clinical CVD Outcomes.

Two studies examined the association between childhood diet and adulthood CVD events. One study found an association between dairy/calcium consumption and lower risk of stroke, but found no association with CHD.134 The other study found that greater vegetable consumption was associated with lower risk of stroke, but greater fish consumption was associated with higher risk of stroke; importantly, this finding may be confounded by the dietary patterns of children during the Great Depression.135

Breastfeeding

Six articles examined associations between breastfeeding in infancy and adulthood CVD outcomes. Two studies examined breastfed infants and adult cIMT in those offspring; in 1 study, there was no association in younger adults (mean age of 31 years) and the other study found that breastfeeding in infancy was associated with thinner cIMT in older adults (mean age of 71 years).136,137 One article examining exposure to breastfeeding and adult arterial stiffness and 1 article examining breastfeeding and endothelial function showed no association.13,136 In 3 articles examining breastfeeding and adult CVD events, 1 study found no association with either CHD or stroke, 1 study found no association with CVD mortality, and the third study found a protective association between breastfeeding and CHD.138140

Psychosocial Risk Factors

Socioeconomic Status.

We identified 13 articles examining childhood socioeconomic status (SES) with adult subclinical and clinical CVD. Most articles used the father’s occupation category as the socioeconomic measure, but childhood household income or parental educational attainment were also used to classify exposure. Two studies that examined SES and adult cIMT showed no association, as did the 1 study that examined SES and endothelial function.141,142 The 1 study examining SES and adult LV structure and function found an association between lower childhood SES and larger adulthood LV mass.143 In the 9 studies examining SES and clinical CVD outcomes, lower childhood SES was associated with higher incidence of clinical CVD (relative risk range, 1.3–1.8), including CHD, stroke, and CVD mortality.81,144152 These associations were robust to multivariable adjustment of childhood and adulthood CVD risk factors, such as adiposity, hyperlipidemia, hypertension, smoking, and family history of CVD.

Psychosocial Adversity.

There were 18 articles examining childhood psychosocial adversity and adulthood CVD outcomes. There was little standardization across articles in the definition of adverse experiences; some studies measured a single adversity, such as exposure to famine or early life parental death, and other studies used scales with multiple adversities, such as an adverse childhood experiences scale or a life events scale. Almost all exposures were assessed retrospectively in adulthood.

Subclinical CVD Outcomes.

Associations between childhood psychosocial adversity and adulthood subclinical CVD were inconsistent or showed no association. There were 4 studies examining psychosocial adversity and cIMT; 2 studies found no association with cIMT, a third study found an association with cIMT for childhood sexual abuse only, and a fourth study found an association with cIMT among White individuals but not Black individuals.153156 Three studies examined childhood psychosocial adversity and adulthood arterial stiffness; 2 studies found no association with arterial stiffness, but the third study found increased childhood exposure to racism was associated with greater arterial stiffness.153,154,157 There was no association observed in the 1 study that assessed the impact of childhood psychosocial adversity and adult LV mass.154 In the 1 study that examined coronary artery calcification, there was a significant association between greater childhood psychosocial adversity and adulthood presence of coronary artery calcification.158

Clinical CVD Outcomes.

There were 11 studies examining childhood psychosocial adversity and adulthood clinical CVD, finding significant positive associations with CHD, stroke, heart failure, and CVD mortality.159169 The magnitude of the association varied by type of adversity exposure. The hazard ratio range of higher incidence of CVD associated with greater psychosocial adversity was 1.3–3.6, and each additional adversity conferred a 30%–70% higher risk of CVD.164 These associations were robust to adjustment for CVD risk factors as well as childhood SES.

Risk Factor Clustering

Metabolic Syndrome.

The metabolic syndrome (MetS) is defined as having at least 3 of the following risk factors: elevated BMI, elevated triglyceride levels, elevated BP, elevated fasting blood glucose, and lower HDL-C. We found 9 studies examined childhood MetS and adulthood CVD risk. Five studies reported that MetS was associated with greater cIMT.25,170173 In 1 study, MetS was associated with greater arterial stiffness.174 In 3 studies, MetS was associated with greater CVD incidence.175177 In the 1 study that examined the associations with adult cIMT by childhood age group, the association was only significant for adolescents aged 11–18 years.171

Other Risk Factor Combinations.

Seven additional studies examined traditional CVD risk factors, including lipids, BMI, BP, diabetes, smoking, diet, and physical activity in different childhood exposure combinations and examined their additive associations with adulthood subclinical CVD; all reported positive associations. Six studies found the number of CVD risk factors was associated with greater cIMT, 2 studies found the number of risk factors was associated with increased arterial stiffness, and 1 study demonstrated associations with presence of coronary artery calcification.12,16,21,22,110,178,179 Two studies that examined associations by age group found that the number of childhood risk factors and adulthood cIMT were only significant for ages 9–18 years.16,21

Other Risk Factors

The 36 remaining articles examined a heterogeneous mix of childhood exposures and the association with adulthood subclinical and clinical CVD. These articles fell into 2 broad categories: maternal and perinatal exposures, an emerging area of interest for cardiometabolic health, and other childhood characteristics and experiences.180216 A full list of the articles is available in Table IV (available at www.jpeds.com).

Table IV.

Additional articles identified, not described in main text

References Year Study population Exposure Outcome Main findings

Tatsukawa et al180 2008 1559 Japanese men and women atomic bomb survivors Amount of radiation exposure in utero CVD: mixed definition Greater dose of radiation associated with greater risk of CVD
Roseboom et al181 2000 736 men and women born during Dutch famine in 1943–1947 Exposure to famine in utero CVD: CHD Exposure to famine in early gestation associated with higher risk of CHD
Ekamper et al182 2015 41 096 male military conscripts born in the Netherlands between 1944 and 1947 Exposure to famine in utero CVD: mixed definition No increase in CVD mortality associated with prenatal famine exposure
Painter et al183 2007 Dutch Famine Birth Cohort, 2414 men and women born in Amsterdam in 1943–1947 Exposure to famine in utero Arterial stiffness Exposure to famine in utero was not associated with arterial stiffness in adulthood
van Abeelen et al184 2012 Dutch Famine Birth Cohort, 2414 men and women born in Amsterdam in 1943–1947 Exposure to famine in utero CVD: mixed definition Women exposed to famine in early gestation had a high risk of CVD mortality, no association among men
Rerkasem et al185 2012 565 twenty-year-olds whose mothers, while pregnant, participated in a nutritional study during 1989–1990 in Chiang Mai, Thailand Maternal protein intake during pregnancy cIMT Lower maternal protein intake during pregnancy was associated with thicker cIMT in adulthood
Eriksson et al183 2014 Helsinki Birth Cohort, 13 345 men and women born in Helsinki, Finland during 1934–1944 Maternal BMI during pregnancy CVD: mixed definition Higher maternal BMI associated with increased risk of CVD in adulthood
Kajantie et al187 2009 Helsinki Birth Cohort, 6410 men and women born in Helsinki, Finland during 1934–1944 Exposure to preeclampsia or gestational hypertension in utero CVD: stroke only Exposure to preeclampsia or gestational hypertension in utero associated with increased risk of stroke in adulthood
Bjarnegard et al188 2013 37 young adults born at term with IUGR and controls in Malmo, Sweden IUGR LV structure and function IUGR associated with small LV diameter
Skilton et al189 2011 Cardiovascular Risk in Young Finns Study Impaired fetal growth cIMT and endothelial function Impaired fetal growth was associated with impaired endothelial function and thicker cIMT in adulthood
Fan et al190 2010 2033 men and women born in Beijing, China between 1921 and 1954 Fetal growth retardation CVD: CHD only Fetal growth retardation associated with increased risk of CHD in adulthood
Ueda et al191 2014 1 306 943 infants born in Sweden between 1983 and 1995 Preterm birth CVD: mixed definition No association between preterm birth and CVD, except among for those born very preterm - higher incidence of stroke
Kajantie et al192 2015 Helsinki Birth Cohort, 19 015 men and women born in Helsinki, Finland during 1934–1944 Preterm birth CVD: CHD and stroke No increased risk of CHD or stroke in people born preterm, except for women born early preterm (<34 weeks)
Lewandowski et al193 2013 234 men and women 20 to 39 years of age who underwent cardiovascular magnetic resonance in Oxford, UK Preterm birth LV structure and function Preterm birth associated with increased LV mass in adulthood
Risnes et al194 2009 31 307 Norwegian men and women born between 1934 and 1959 Placenta-to-birth-weight ratio CVD: mixed definition Higher placenta-to-birth-weight ratio associated with increased risk of CVD mortality
Barker et al196 2010 Helsinki Birth Cohort, 13 345 men and women born in Helsinki, Finland during 1934–1944 Placental surface area CVD: heart failure Small placental surface area (<225 cm2) was associated with increased risk of heart failure in adulthood
Risnes et al195 2009 46 311 births in Trondheim, Norway, from 1920 to 1959 Head circumference at birth CVD: CHD/MI Small head size at birth associated with increased risk of CHD death
Gunnell et al198 1998 Boyd-Orr Cohort, 2547 children living in England and Scotland in 1937–1939 Age and sex specific z scores for height, leg length, and trunk length CHD Shorter leg length associated with higher risk of CHD in both men and women, only for 8 and under
Silventoinen et al199 2012 232 063 children born in 19301976 who attended school in Copenhagen, Denmark Growth in height from 7 to 13 years of age CVD: CHD/MI Height was inversely related to risk of CHD, but rapid growth in height was also associated with increased CHD risk
Whitley et al200 2012 Boyd-Orr Cohort, 1043 children living in England and Scotland in 1937–1939 Childhood stature: height, shoulder breadth, leg, trunk and foot length CVD: mixed definition Childhood stature associated with CVD morbidity and mortality in adulthood
Batty et al201 2007 Hertfordshire Cohort, 4351 children in UK Diarrhea in early childhood (age 05 years) CHD No evidence that diarrhea in early life associated with increased risk of CHD in older adults
Mueller et al202 2012 Singapore Chinese Health Study, 34 022 women Age at menarche CVD: mixed definition Higher age at menarche associated with lower risk of CHD among nonsmokers, but no association for smokers or stroke
Canoy et al203 2015 Million Women Study, 1 217 840 women based in UK Age at menarche CVD: mixed definition U-shaped association, early and late ages at menarche associated with increased CVD risk
Wang et al204 2016 CHARLS: 2013 China Health and Retirement Longitudinal Study -nationally representative of Chinese residents aged ≥45, 10 000 men and women Self-reported health in childhood (retrospective assessment) CHD Poor childhood health associated with higher risk of CHD
Juonala et al205 2006 Cardiovascular Risk in Young Finns Study, 1617 children C-reactive protein levels cIMT Childhood C-reactive protein did not predict adult cIMT
Du et al206 2018 Bogalusa Heart Study, 1052 men and women Serum adiponectin levels and BMI cIMT Association between higher BMI and thicker cIMT only present in those with childhood adiponectin levels below the median
Saarikoski et al207 2017 Cardiovascular Risk in Young Finns Study Serum adiponectin levels cIMT Lower adiponectin levels associated thicker cIMT in adulthood
Batty et al208 2005 6910 men born in 1953 in Copenhagen, Denmark Childhood intelligence test scores, as measured by the Swedish Harnqvist intelligence test CVD: mixed definition Low intelligence associated with increased risk of CHD by not stroke
Keltikangas-Jarvinen et al209 2006 Cardiovascular Risk in Young Finns Study, 708 children Hyperactivity in childhood cIMT Hyperactivity predicted cIMT
Dedman et al210 2001 Boyd-Orr Cohort, 4301 children living in England and Scotland in 1937–1939 Housing conditions included crowding, water supply, toilet facilities, adequacy of ventilation, and cleanliness CHD Poorer housing conditions in childhood were associated with increased CHD mortality, independent from SES
Howard et al211 2013 Reasons for Geographic and Racial Differences in Stroke study, 24 544 stroke-free men and women enrolled 2003–2007 Residence in stroke belt during childhood CVD: stroke only Residence in the stroke belt important during adolescence, effect stronger in Blacks vs Whites
Aberg et al212 2015 1 166 035 Swedish male military conscripts registered in 1968–2005 Aerobic fitness and muscle strength CVD: stroke only Low fitness and low muscle strength associated with increased risk of stroke
Ferreira et al213 2002 Amsterdam Growth and Health Longitudinal Study, 154 men and women in the extended cardiorespiratory follow-up Aerobic fitness cIMT and arterial stiffness Increased aerobic fitness associated with thinner cIMT and less arterial stiffness
Ferreira et al214 2003 Amsterdam Growth and Health Longitudinal Study, 154 men and women in the extended cardiorespiratory follow-up Changes in VO2max from adolescence to age 36 cIMT and arterial stiffness Increases in VO2max from adolescence to age 36 were associated with less arterial stiffness, but no association with cIMT
Lindgren et al215 2017 1 226 623 Swedish male military conscripts registered in 1969–2005 Cardiorespiratory fitness Heart failure Greater fitness associated with lower risk of hospitalization for heart failure
Hogstrom et al216 2014 743 498 Swedish male military conscripts registered in 1969–1984 Aerobic fitness CVD: CHD/MI Low aerobic fitness associated with increased risk of myocardial infarction

IUGR, intrauterine growth restriction; MI, myocardial infarction.

Discussion

In this review of 210 articles examining childhood exposures and the development of subclinical and clinical CVD among adults, robust evidence linked increased pediatric adiposity with subclinical and clinical CVD; robust evidence linked pediatric hypertension, hyperlipidemia, and risk factor clustering with subclinical CVD, but limited evidence to date linked these factors with adult clinical CVD. Robust evidence linked low birthweight, worse SES, and psychosocial adversity with clinical CVD, but limited evidence was available for subclinical CVD. Breastfeeding, poor glycemic control, tobacco exposure, less physical activity, and worse diet quality during childhood all had limited numbers of studies across heterogeneous populations, and more research is necessary to determine whether those factors are consistently associated with subclinical and clinical CVD among adults. One promising new study to address some of the existing gaps in the research is the International Childhood Cardiovascular Cohort Consortium Outcomes Study (i3C Outcomes), in which detailed biological, physical, and socioeconomic measures collected in childhood are being harmonized across 7 existing longitudinal cohorts, and connected with self-reported incident CVD endpoints, medical records to adjudicate these endpoints, and national death records to explore CVD-related mortality.217 We found no consistent evidence for major sex differences in risk of subclinical or clinical CVD for childhood risk factors. Most studies that examined sex differences found similar associations for men and women with null interaction terms. In contrast, few studies examined potential differences by race and/or ethnicity; most cohorts had samples that were homogenous in race/ethnicity, and therefore did not permit analyses of this nature. Furthermore, the majority of cohorts were based in the US or Europe, with majority White populations. Few studies in this review were from cohorts based in Africa, Latin America, or Asia. New recruitment of diverse cohorts is needed to adequately understand any complex racial/ethnic differences in the associations between childhood risk factors and adulthood CVD, and special consideration should be given to global cohorts that have been underrepresented in previous research.

The majority of systematic reviews and meta-analyses linking childhood exposures and adult outcomes have focused on the development of risk factors in adulthood, such as hypertension or dyslipidemia. However, several have examined subsets of this comprehensive review. A systematic review published in 2014 relating either early life BP, BMI, and/or glycemic control to future cardiac structure and/or function found all 3 risk factors to be associated with worse future diastolic function.218 The age of exposure criteria differed, in that articles with young adults over age 20 years were included, but nevertheless, conclusions were similar to those we observed for childhood BMI and BP and LV structure and function. In another systematic review of childhood socioeconomic circumstances and CVD risk in adulthood published in 2006, the authors concluded that childhood SES was a robust predictor of adulthood CVD risk, as we have concluded in this review.219

There are multiple life course models (Figure 3) that may reflect contributory pathways from childhood exposure to adulthood CVD. Articles that have more robust associations with CVD as the exposure is measured in adolescence as compared with early childhood or in adulthood as compared with childhood may support a chain-of-risk life course model. This finding demonstrates that childhood risk factors may increase the likelihood of having adulthood risk factors, but the adulthood risk factor status primarily affects the outcome, which represents an encouraging pediatric model because childhood risk status may be modifiable, with favorable long-term consequences.5

Figure 3.

Figure 3.

Life course models for CVD development. The 3 hypothesized life course models for the development of CVD: chain of risk, where childhood risk is entirely mediated through adulthood risk; accumulation of risk, where risk factors present at each life stage further increase adulthood risk; and the critical/sensitive period, where exposure at a certain point in the life course confers more risk as compared with other life course stages.

Articles that find the highest risk of adulthood CVD among those with persistent exposures in childhood and adulthood may represent an accumulation-of-risk model, whereby exposures at each point in the life course further increase likelihood of CVD development. Furthermore, in a sensitive period model, exposure at a certain point in the life course confers increased risk that is less harmful at a different time point. Both the accumulation-of-risk and sensitive periods models highlight the necessity of prevention in early childhood and the prenatal period, to decrease the likelihood of having the exposure and thus developing CVD in adulthood. Several complexities of longitudinal research emerged in this literature review.4 A prospective cohort with decades of follow-up requires a substantial investment of resources; consequently, a limited number of unique cohorts exist. There were multiple articles using the same cohort data, perhaps oversaturating findings that are specific to the sample population. Childhood exposures were frequently assessed retrospectively, leading to broad measures that are subject to recall bias. Other cohorts used medical and other administrative records to collect childhood exposures and/or adult CVD events. The increased use of electronic medical records may be a novel method to facilitate research on childhood exposures, but some risk factors are not routinely collected in clinical encounters, such as lifestyle behaviors.

Although many of the cohorts followed participants for decades, often the adulthood exposure assessments were conducted around ages 30–40 years. Although population-level subclinical atherosclerotic differences may be present by those ages, CVD events are rare. The studies that did use a prospective cohort design were, therefore, mostly examining “premature” CVD. It is likely that findings would shift with additional years of data collection and thus continued resources to encourage follow-up of these cohorts is necessary to capture the natural history of CVD. Further, few articles directly accounted for differential loss to follow-up in which healthier individuals are more likely to continue participating in the study and less likely to have a severe competing risk (such as non-CVD-related death), resulting in survivor bias toward the null.

Incomplete adjustment for confounding was major source of threat to internal validity. Retrospective studies often had only a few questions about childhood, limiting the adjustment for contextual factors that could influence the outcome and the exposure. For example, studies on birthweight and adulthood CVD often lacked data on maternal health, which could include family history of CVD risk. Prospective studies tended to have a greater range of childhood risk factors measured, but often lacked behavioral and lifestyle factors that could inform clinical risk factors in childhood, continuing into adulthood. External validity to contemporary prevention settings was limited by exposures that have had significant secular change over the course of follow-up. For example, dietary patterns and tobacco exposure—particularly secondhand tobacco exposure in children—have shifted over time. Findings must, therefore, be placed into context before applying them to preventive strategies.

Last, there are limitations in how the literature review was conducted and the results reported. This review was intended to broadly cover childhood exposure to known CVD risk factors and the relationship to adulthood subclinical and clinical CVD. We created search terms based on the extant knowledge of major CVD risk factors, and studies focused on emerging areas of research, such as the prenatal environment or neurodevelopment health, may not be not be fully captured in our systematic search. Further, with the known publication bias in the biomedical literature whereby articles with statistically significant findings are more likely to be submitted and accepted, analyses with null findings are likely underrepresented within our study and may bias our results toward significant findings. Given the breadth of the topic, we were unable to give detailed assessment of the quality of each of the included studies, and there may be differences in methodology, for example, sample size, sampling frame, adjustment for potential confounders, potential for measurement error, that impact the relative strength of the evidence. If the findings of a study were counter to the other included studies for a similar exposure and outcome, we did attempt to provide additional details to understand the divergent findings. Finally, the heterogeneous nature of the exposure measurements, outcome ascertainment, duration of follow-up, and background environment of the studies, as well as the potential for oversaturation from specific study cohorts precluded reliable quantification of associations through meta-analysis.

In conclusion, an examination of childhood risk factors and their associations with adulthood subclinical and clinical CVD reveals a large and varied body of evidence in which some areas of consistency can be discerned. As robust evidence emerges demonstrating that risk of CVD-related morbidity and mortality have origins in childhood, pediatric clinicians can continue to be encouraged to address major risk factors in their practice, understanding that they may alter life-long health trajectories and improve outcomes across decades for their patients. Likewise, the public health implications of intervening on childhood risks factors such as obesity or pediatric hypertension can amount huge improvements in the population-level incidence of CVD, as well as improvements in the long-term sequalae of chronic disease: years of potential life lost, disability adjusted life years, and overall spending on healthcare.

Nevertheless, major gaps remain in the research and in understanding how childhood health behaviors translate to risk of CVD later in life. This review is intended to update the current data to guide future research not only towards to addressing gaps, but also toward developing novel risk factor trajectories, cardiovascular health growth curves, and a priori exploration of maternal and intergenerational risk transmission. It may also point the way to future interventional studies designed to decrease the long-term incidence of subclinical and clinical CVD.

Acknowledgments

Supported by the American Heart Association (17SFRN33700101 [to N.B.]). The funder/sponsor did not participate in the work. The authors declare no conflicts of interest.

Glossary

BP

Blood pressure

BMI

Body mass index

CVD

Cardiovascular disease

cIMT

Carotid intima-media thickness

CHD

Coronary heart disease

HDL-C

High-density lipoprotein cholesterol

LDL-C

Low-density lipoprotein cholesterol

LV

Left ventricular

MetS

Metabolic syndrome

SES

Socioeconomic status

Data Statement

Data sharing statement available at www.jpeds.com.

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