Table 1. Maternal sociodemographic, obstetric and infant birth data.
| Period I (1996–1999) n=117 | Period II (2000–2003) n=105 | P-value | |
|---|---|---|---|
| Maternal sociodemographic factors | |||
| Age (mean±s.d.) | 27.5±6.7 | 27.3±7.2 | 0.817 |
| Married, n (%) | 54 (46) | 40 (38) | 0.225 |
| Black race, n (%) | 66 (56) | 65 (62) | 0.406 |
| Education, n (%) | |||
| Greater than high school | 57 (49) | 42 (40) | |
| Completed high school | 44 (38) | 39 (37) | 0.074a |
| Less than high school | 16 (14) | 24 (23) | |
| Perinatal risk factors | |||
| Pregnancy-induced hypertension, n (%) | 15 (13) | 16 (15) | 0.604 |
| Chorioamnionitis n (%) | 15 (13) | 12 (11) | 0.838 |
| Antenatal steroid therapy, n (%) | 84 (72) | 87 (83) | 0.050 |
| Cesarean section, n (%) | 64 (55) | 55 (52) | 0.729 |
| Infant born outside hospital, n (%) | 9 (8) | 10 (10) | 0.626 |
| Infant birth data | |||
| Gestational age, weeks (mean±s.d.) | 25.2±1.3 | 25.1±1.2 | 0.323 |
| Birth weight, g (mean±s.d.) | 767.4±153.0 | 750.1±143.6 | 0.386 |
| Length, cm (mean±s.d.) | 32.6±2.30 | 32.7±2.4 | 0.847 |
| Head circumference, cm (mean±s.d.) | 23.2±1.5 | 22.9±1.5 | 0.130 |
| Male sex, n (%) | 55 (47) | 52 (50) | 0.708 |
| Multiple births, n (%) | 15 (13) | 25 (24) | 0.033 |
In some instances, data were missing for one or two children.
a
Cochran–Armitage test.