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. Author manuscript; available in PMC: 2024 Nov 1.
Published in final edited form as: Clin Nutr. 2023 Sep 20;42(11):2229–2240. doi: 10.1016/j.clnu.2023.09.005

Table 3.

Summary Statistics for Predictors

Class 1: DHA Mean (SD) Class 3: Exposures mean (SD)
Total DHA Supplement (mg/day) 428.3 (366.1) Alcohol drinks 6 months prior to pregnancy (count/day) 1.5 (2.3)
Maternal RBC-PL DHA level at enrollment (% total fatty acids) 6.38 (1.77) Smoking status 6 months prior to pregnancy Yes n (%) 142 (12.9%)
Estimated DHA intake at enrollment from DHA FFQ (mg/day) 148.7 (126.9)

Class 2: Nutrients mean(SD) Class 4: Demographics mean(SD)
*Arginine (g/day) 4 (4) Maternal age at enrollment (years) 30.2 (5.6)
*Available carbohydrate (g/day) 259 (268) Marital status
Betaine (mg/day) 161 (179) Married/Partnered n (%) 704 (64.0%)
Caffeine (mg/day) 131 (160) Other n (%) 396 (36.0%)
Calcium (mg/day) 1213 (1299) Household income
*Cholesterol (mg/day) 306 (272) $50,000 and over n (%) 512 (46.5%)
Choline (mg/day) 346 (310) Other n (%) 588 (53.5%)
*Food folate (mcg/day) 335 (304) Health insurance status
Fructose (g/day) 42 (64) Insured n (%) 911 (82.8%)
*Iron (mg/day) 15 (14) Uninsured n (%) 189 (17.2%)
*Lysine (g/day) 5 (5) Maternal education level
*Magnesium (mg/day) 337 (258) Bachelor's degree or higher n (%) 495 (45.0%)
Omega-3 fatty acids (g/day) 1.73 (1.62) Other n (%) 605 (55.0%)
PFA 20:4/ Arachidonic (mg/day) 96 (123) Paternal education level
PFA 22:6/Docosahexaenoic (mg/day) 59 (74) Bachelor's degree or higher n (%) 412 (37.5%)
Retinol (mcg/day) 510 (542) Other n (%) 688 (62.5%)
*Riboflavin/Vitamin B2 (mg/day) 2 (2) Maternal race/ethnicity
*Selenium (mcg/day) 101 (87) Black n (%) 256 (23.3%)
*Sodium (mg/day) 3196 (2886) Other n (%) 844 (76.7%)
Sucrose (g/day) 48 (61) Infant sex
*Thiamin/Vitamin B1 (mg/day) 2 (1) Male n (%) 532 (48.4%)
*Total dietary fiber (g/day) 21 (17) Female n (%) 500 (45.5%)
Total folate (mcg/day) 447 (373) Unknown n (%) 68 (6.2%)
*Total protein (g/day) 78 (73)
Total vitamin A activity/Retinol Equivalents (mcg/day) 1302 (1528)
Vitamin B12 (mcg/day) 6 (7)
*Vitamin B6 (mg/day) 2 (3)
Vitamin D/calciferol (mcg/day) 5 (7)
Vitamin E/International Units (IU/day) 16 (19)
*Zinc (mg/day) 12 (12)
Class 5: Maternal Health History mean (SD)
BMI at enrollment 28.2 (7.3)
Gestational weight gain (lb) 31.1 (18.9)
Gestational age at enrollment (weeks) 16.8 (2.6)
Gravida/number of pregnancies 2.7 (1.9)
Number of early preterm births 0.16 (0.48)
Systolic blood pressure at enrollment (mm Hg) 115.2 (12.4)
Diabetes blood pressure at enrollment (mm Hg) 68.2 (9.4)
Highest diastolic blood pressure during pregnancy (mm Hg) 75.8 (11.2)
Highest Systolic blood pressure during pregnancy (mm Hg) 131.7 (14)
Iron status/hemoglobin at enrollment (g/dl) 12.7 (1.0)
Iron status/hemoglobin at mid-pregnancy (g/dl) 11.5 (1.0)
Cervical length between 18–22 weeks gestation (cm) 4.1 (2.7)
Estimated blood loss at delivery (mL) 429.2 (341.4)
Infant APGAR scores at 1 minute of life 7.9 (1.6)
Infant APGAR scores at 5 minutes of life 8.8 (0.7)
Preterm delivery (<37 weeks gestation)
Yes n (%) 98 (8.9%)
No n (%) 1002 (91.1%)
Gestational diabetes
Yes n (%) 68 (6.2%)
No n (%) 1032 (93.8%)
Meconium
Yes n (%) 121 (11.0%)
No n (%) 979 (89.0%)
Illicit drug use
Yes n (%) 90 (8.2%)
No n (%) 1010 (91.8%)