Table 1:
Selected characteristics of mother-infant pairs from Project Viva included in this analysis
| Characteristics | Full cohort (n =1391) mean ± SD or n (%) |
Male (n = 718) mean ± SD or n (%) |
Female (n = 673) mean ± SD or n (%) |
|---|---|---|---|
| Age, years, | 32.3 ± 4.7 | 32.2 ± 4.7 | 32.4 ± 4.6 |
| Maternal Race/ethnicity | |||
| White | 1014 (72.9) | 522 (72.7) | 492 (73.1) |
| Black | 175 (12.6) | 91 (12.7) | 84 (12.5) |
| Hispanic | 95 (6.8) | 52 (7.2) | 43 (6.4) |
| Other | 107 (7.7) | 53 (7.4) | 54 (8.0) |
| Parity | |||
| Nulliparous | 667 (48.0) | 333 (46.4) | 334 (49.6) |
| Multiparous | 724 (52.0) | 385 (53.6) | 339 (50.4) |
| Education | |||
| <College graduate | 428 (30.8) | 244 (44.0) | 184 (27.3) |
| ≥College graduate | 963 (69.2) | 474 (66.0) | 489 (72.7) |
| Household oncome | |||
| <$70,000/year | 547 (39.3) | 286 (39.8) | 261 (38.8) |
| ≥$70,000/year | 844 (60.7) | 432 (60.2) | 412 (61.2) |
| Pre-pregnancy BMI, kg/m2 | |||
| <25 | 862 (62.0) | 443 (61.7) | 419 (62.3) |
| 25– <30 | 309 (22.2) | 167 (23.3) | 142 (21.1) |
| >=30 | 220 (15.8) | 108 (15.0) | 112 (16.6) |
| Smoking | |||
| Never smoker | 949 (68.2) | 481 (67.0) | 468 (69.5) |
| Former smoker | 272 (19.6) | 142 (19.8) | 130 (19.3) |
| Smoking in pregnancy | 170 (12.2) | 95 (13.2) | 75 (11.1) |
| Birth Outcomes | |||
| Gestational age at delivery, weeks | 39.5 ± 1.8 | 39.5 ± 1.8 | 39.5 ± 1.9 |
| Birth weight, g | 3492.8 ± 567.0 | 3574.7 ± 593.1 | 3405.8 ± 524.4 |
| Head circumference, cm a | 34.2 ± 1.3 | 34.5 ± 1.3 | 33.8 ± 1.2 |
| Birth length, cm a | 49.9 ± 2.1 | 50.4 ± 2.1 | 49.5 ± 2.0 |
a
Sample size for head circumference was 791 (male = 394, female = 397) and for birth length was 729 (male = 363, female = 366)