Table 1.
Demographic and antenatal characteristics by timing of antenatal corticosteroid administration
| <2 days (n=622) | 2 to <7 days (n=821) | 7 to <14 days (n=401) | ≥ 14 days (n=415) | p-value | |
|---|---|---|---|---|---|
| Enrolled in Genomics and Proteomics Network for | 352 (56.6) | 174 (21.2) | 73 (18.2) | 82 (19.8) | <0.001 |
| Preterm Birth Research study | |||||
| Maternal age (years) | 25.9 ± 6.1 | 25.0 ± 6.2 | 26.4 ± 5.9 | 26.9 ± 6.2 | <0.001 |
| Nulliparous | 298 (47.9) | 317 (38.6) | 147 (36.7) | 135 (32.5) | <0.001 |
| Black race | 179 (28.8) | 351 (42.8) | 171 (42.6) | 131 (31.6) | <0.001 |
| Less than a high school level education | 408 (65.8) | 522 (64.0) | 281 (70.1) | 300 (72.3) | 0.01 |
| Married | 312 (50.2) | 372 (45.5) | 194 (48.5) | 229 (55.2) | 0.01 |
| Gestational or pre-gestational diabetes mellitus | 18 (2.9) | 36 (4.4) | 9 (2.2) | 22 (5.3) | 0.06 |
| Preterm prelabor rupture of membranes | 356 (57.2) | 670 (81.6) | 363 (90.5) | 375 (90.4) | <0.001 |
| Duration of ruptured membranes (hours) | 3 (0.1, 19) | 79 (33, 122) | 216 (169, 271) | 435 (329, 636) | <0.001 |
| Chorioamnionitis suspected prior to delivery | 56 (9.0) | 140 (17.1) | 88 (22.0) | 67 (16.1) | <0.001 |
| Tobacco use during pregnancy | 135 (21.7) | 232 (28.3) | 100 (24.9) | 110 (26.5) | 0.04 |
| Gestational age at delivery (weeks) | 29.7 ± 2.9 | 29.0 ± 2.7 | 29.2 ± 2.7 | 30.9 ± 2.3 | <0.001 |
| Cesarean delivery | 167 (26.9) | 271 (33.0) | 142 (35.4) | 162 (39.0) | <0.001 |
Data presented as n (%) or mean +/− standard deviation or median (25% IQR, 75% IQR)