Table 1.
Population demographic and pregnancy characteristics among women from the PROTECT cohort (n=1090).
| n (%) | |
|---|---|
| Maternal age at enrollment (years) | |
| 18–24 | 388 (35.6) |
| 25–29 | 346 (31.8) |
| 30–34 | 223 (20.5) |
| >35 | 132 (12.1) |
| missing | 1 |
| Years of education | |
| <High school | 69 (6.44) |
| High school/equivalent | 126 (11.8) |
| Some college/technical school | 380 (35.5) |
| ≥College degree | 497 (46.4) |
| missing | 18 |
| Annual household income (US dollars) | |
| <20,000 | 418 (44.2) |
| 20,000–40,000 | 302 (31.9) |
| >40,000 | 226 (23.9) |
| missing | 144 |
| Marital status | |
| Single | 195 (18.1) |
| Married/cohabitating | 881 (81.9) |
| missing | 14 |
| Pre-pregnancy body mass index (kg/m2) | |
| <18.5 | 70 (6.81) |
| 18.5–24.9 | 500 (48.6) |
| 25.0–29.9 | 278 (27.0) |
| >30 | 180 (17.5) |
| missing | 62 |
| Employment | |
| Employed | 699 (65.2) |
| Unemployed | 373 (34.8) |
| missing | 18 |
| Smoking status | |
| Never | 917 (85.3) |
| Ever | 141 (13.1) |
| Current | 17 (1.58) |
| missing | 15 |
| Alcohol use during pregnancy | |
| None | 1004 (93.7) |
| Any | 68 (6.34) |
| missing | 18 |
| Newborn sex | |
| Female | 512 (47.2) |
| Male | 572 (52.8) |
| missing | 6 |
| Preterm delivery (<37 weeks gestation) | |
| Yes | 101 (9.27) |
| No | 989 (90.7) |