TABLE I.
Epidemiological Characteristics of 308 Black Infants in the Boston Birth Cohort by Maternal Prepregnancy BMI
| BMI < 25 (N = 130) | 25 ≤ BMI <30 (N = 98) | BMI ≥ 30 (N = 80) | |
|---|---|---|---|
| Variables | N (%) | ||
| Maternal age (yrs) | |||
| <20 | 10 (8) | 6 (6) | 8 (10) |
| 20–25 | 30 (23) | 15 (15) | 16 (20) |
| 25–30 | 35 (27) | 30 (31) | 18 (23) |
| 30–35 | 33 (25) | 22 (22) | 27 (34) |
| ≥35 | 22 (17) | 25 (26) | 11 (14) |
| Maternal education | |||
| Middle school | 30 (23) | 28 (29) | 27 (34) |
| High school | 43 (33) | 38 (39) | 23 (29) |
| > High school | 57 (44) | 32 (33) | 30 (38) |
| Marrieda | 51 (39) | 49 (50) | 23 (29) |
| Null paritya | 63 (49) | 59 (61) | 54 (68) |
| Maternal smoking during pregnancy | 10 (8) | 3 (3) | 9 (11) |
| Infant gender (Male) | 71 (55) | 47 (48) | 37 (46) |
| Mean ± SD | |||
| Gestational weeks | 39.15 ± 1.21 | 39.44 ± 1.27 | 39.47 ± 1.20 |
| Birth weightb | 3115 ± 471 | 3262 ± 474 | 3449 ± 524 |
| African ancestry proportiona,c | 0.84 ± 0.13 | 0.85 ± 0.15 | 0.82 ± 0.12 |
a
<0.05
b
<0.001
c
Missing in 12 samples.