Table 1.
Distribution of biological, behavioral, and social factors in the overall study population (N=2,082).
| N (%) | |
|---|---|
| Biological and behavioral factors | |
| Maternal age (years) | |
| 18–24 | 458 (22%) |
| 25–29 | 531 (26%) |
| 30–34 | 616 (30%) |
| ≥35 | 429 (21%) |
| Missing | 48 (2.3%) |
| Pre-pregnancy BMI (kg/m2) | |
| Underweight | 88 (4%) |
| Normal | 1069 (51%) |
| Overweight | 466 (22%) |
| Obese | 394 (19%) |
| Missing | 65 (3.1%) |
| Parity | |
| 0 | 900 (43%) |
| 1+ | 991 (48%) |
| Missing | 191 (9.2%) |
| Current smoker | |
| No | 1929 (93%) |
| Yes | 76 (4%) |
| Missing | 77 (3.7%) |
| Social factors | |
| Maternal race/ethnicity | |
| White | 781 (38%) |
| Black | 114 (5%) |
| Asian/Pacific Islander | 108 (5%) |
| Latina | 999 (48%) |
| Other/multi-racial | 49 (2%) |
| Missing | 31 (1.5%) |
| Maternal education | |
| <High school | 145 (7%) |
| High school or some college | 459 (22%) |
| College degree | 832 (40%) |
| Graduate degree | 628 (30%) |
| Missing | 18 (0.9%) |
| Marital status | |
| Married | 1347 (65%) |
| Living together | 396 (19%) |
| Single | 325 (16%) |
| Missing | 14 (0.7%) |
| Stressful life events | |
| None | 1251 (60%) |
| Any | 701 (34%) |
| Missing | 130 (6.2%) |
BMI, body mass index.