Table 1.
Frequency of maternal and neonatal characteristics by the duration of exposure to intrapartum antibiotic therapy for group B streptococcus.
| <4 hours of antibiotics | ≥4 hours of antibiotics | P value | |
|---|---|---|---|
| N = 1,149 | N = 3,633 | ||
| Maternal age (years) | 30.1 ± 6.2 | 29.4 ± 7.4 | <.01 |
| Race | .20 | ||
| White | 547 (48) | 1,828 (50) | |
| Black | 233 (20) | 730 (20) | |
| Hispanic | 251 (22) | 698 (19) | |
| Asian | 64 (6) | 167 (5) | |
| Other | 54 (5) | 210 (6) | |
| EGA at delivery (weeks) | 39.0 + 1.0 | 39.1 + 1.0 | 1.0 |
| Duration of ROM (hours) | 2.8 ± 3.2 | 6.8 ± 5.7 | <.01 |
| % with ≥18 hours of ROM | 0 | 11 (0.3) | |
| Duration of antibiotics (hours) | 2.5 ± 1.1 | 8.8 ± 4.8 | <.01 |
| Birth weight (grams) | 3,341 ± 454 | 3,404 ± 433 | <.01 |
| NICU nursery admission | 11 (1) | 15 (0.4) | .04 |
| Length of infant stay | 2.6 ± 4.0 | 2.5 ± 3.5 | .99 |
Data are mean ± standard deviation or n (%).
EGA: estimated gestational age; ROM: rupture of membranes; NICU: neonatal intensive care unit.