Table 1.
Characteristics of study subjects.
| N (%) | |
|---|---|
| Infant gender | |
| Male | 59 (55) |
| Female | 48 (45) |
| Preterm birth (≤36 weeks; study pregnancy) | 26 (25) |
| Maternal age | |
| 20–24 | 20 (19) |
| 25–29 | 28 (26) |
| 30–34 | 17 (16) |
| 35–39 | 29 (27) |
| ≥40 | 13 (12) |
| Maternal race/ethnicity | |
| White | 33 (31) |
| Black | 27 (25) |
| Hispanic | 35 (33) |
| Other | 11 (10) |
| Missing | 1 (1) |
| Maternal education | |
| <High school graduate | 20 (19) |
| High school graduate | 26 (24) |
| Some college | 27 (25) |
| College degree | 33 (31) |
| Missing | 1 (1) |
| Maternal employment status | |
| Employed | 50 (47) |
| Unemployed | 51 (48) |
| Missing | 6 (6) |
| Smoked during pregnancy | |
| Never | 86 (82) |
| Rarely | 3 (3) |
| Sometimes | 5 (5) |
| Often | 11 (10) |
| Number of previous pregnancies | |
| 0 | 17 (16) |
| 1 | 29 (27) |
| 2 | 21 (20) |
| 3 | 21 (20) |
| ≥4 | 19 (18) |
| Indication for high-risk pregnancy | |
| Congenital anomaly | 4 (4) |
| Previous preterm delivery | 35 (33) |
| Diabetes | 17 (16) |
| Hypertension | 21 (19) |
| Urinary infection | 8 (7) |
| Febrile illness | 14 (13) |
| Missing | 8 (7) |