TABLE 1.
Baseline Characteristics of the Study Participants Stratified by Their Baseline PA Levels
| Baseline Characteristics |
No LTPA (N = 10,623) |
1–499 MET- min/week (N = 17,714) |
500–1,000 MET- min/week (N = 9,349) |
>1,000 MET-min/week (N = 13,765) |
pTrend |
|---|---|---|---|---|---|
|
| |||||
| Age, yrs | 62 (56–69) | 63 (57–69) | 64 (57–70) | 64 (55 –70) | <0.0001 |
|
| |||||
| Men | 8.3 | 5.6 | 9.4 | 17.6 | <0.0001 |
|
| |||||
| Race/ethnicity | |||||
| White | 44.3 | 50.0 | 53.8 | 55.4 | <0.0001 |
| Black | 35.3 | 32.8 | 28.8 | 27.0 | <0.0001 |
| Hispanic | 16.7 | 14.3 | 13.8 | 13.6 | <0.0001 |
|
| |||||
| Annual income >$50,000/yr | 21.5 | 23.8 | 28.3 | 33.3 | <0.0001 |
|
| |||||
| Education | |||||
| < High school | 18.4 | 13.5 | 11.1 | 10.1 | <0.0001 |
| High school | 22.1 | 19.9 | 18.4 | 16.1 | <0.0001 |
| Some college | 34.1 | 36.2 | 35.1 | 33.8 | 0.09 |
| College + | 25.4 | 30.4 | 35.3 | 40.0 | <0.0001 |
|
| |||||
| Study cohort | |||||
| MESA | 14.6 | 5.9 | 11.6 | 22.2 | <0.0001 |
| CHS | 8.6 | 8.9 | 9.9 | 11.5 | <0.0001 |
| WHI | 76.8 | 85.2 | 78.5 | 66.3 | <0.0001 |
|
| |||||
| HTN status (yes) | 42.8 | 41.3 | 37.8 | 35.3 | <0.0001 |
|
| |||||
| Systolic BP mm Hg | 129 (117–141) | 129 (118–141) | 127 (116–140) | 126 (115–140) | <0.0001 |
|
| |||||
| DM status (yes) | 11.0 | 10.1 | 8.7 | 7.7 | <0.0001 |
|
| |||||
| BMI, kg/m2 | 29.9 (26.0–34.7) | 28.8 (25.4–33.1) | 27.6 (24.5–31.3) | 26.8 (23.9–30.2) | <0.0001 |
|
| |||||
| BMI categories* | |||||
| Underweight | 0.8 | 0.5 | 0.7 | 0.8 | 0.23 |
| Normal weight | 18.3 | 22.0 | 27.9 | 34.1 | <0.0001 |
| Overweight | 31.6 | 35.3 | 38.3 | 39.0 | <0.0001 |
| Obese class I | 25.8 | 24.4 | 21.5 | 17.8 | <0.0001 |
| Obese class II/III | 23.6 | 17.7 | 11.6 | 8.2 | <0.0001 |
|
| |||||
| Smoking status | |||||
| Former | 35.4 | 35.6 | 38.7 | 41.9 | <0.0001 |
| Current | 13.4 | 11.3 | 9.2 | 8.3 | <0.0001 |
|
| |||||
| Current alcohol use | 20.8 | 26.1 | 32.1 | 35.5 | <0.0001 |
|
| |||||
| PA level (MET-min/week) | 0 | 225 (120–360) | 708 (615–840) | 1,650 (1,260–2,400) | NA |
Data presented as median (interquartile range) for continuous variables and % for categorical variables.
*
Underweight: <18.5 kg/m2; normal weight: 18.5 to <25 kg/m2; overweight: 25 to <30 kg/m2; obese class I: 30 to <35 kg/m2 obese class II/III ≥35 kg/m2
BMI = body mass index; BP = blood pressure; CHS = Cardiovascular Health Study; DM = diabetes mellitus; HTN = hypertension; LTPA = leisure time physical activity; MESA = Multiethnic Study of Atherosclerosis; MI = myocardial infarction; PA = physical activity; WHI = Women’s Health Initiative; NA = Not Applicable