Table 2.
Association between amniotomy exposure and maternal outcomes.
| Outcome | Early amniotomy | Late amniotomy | P value* |
|---|---|---|---|
| N = 398 | N = 1,169 | ||
| Chorioamnionitis, n (%) | 40 (10.2) | 149 (13.2) | 0.12 |
| Rates of chorioamnionitis based on mode of delivery, n (%) | |||
| Vaginal delivery | 20 (8.4) | 117 (14.6) | 0.01 |
| Cesarean section | 20 (12.7) | 32 (9.7) | 0.30 |
| Mode of delivery, n (%) | |||
| Cesarean section | 160 (40.2) | 345 (29.5) | <0.001 |
| Operative vaginal delivery | 31 (7.8) | 117 (10.0) | 0.19 |
| Time to vaginal delivery, minutes | 329 (216–493) | 472 (313–700) | <0.001 |
| Fetal weight (gms) | |||
| Vaginal delivery | 3172 (2828–3444) | 3192 (2828–3528) | 0.33 |
| Cesarean section | 3332 (2856–3696) | 3444 (3065–3752) | 0.02 |
| Endometritis, n (%) | 9 (2.3) | 11 (0.9) | 0.04 |
| Cord prolapse, n (%) | 1 (0.3) | 2 (0.2) | 0.56 |
| Neonatal 5-minute APGARs | 9 (9-9) | 9 (9-9) | 0.13 |
| Admission to intensive care nursery, n (%) | 57 (14.3) | 166 (14.2) | 0.95 |
*Categorical data analyzed with chi-square tests and data reported as N (%).
Continuous data analyzed with nonparametric comparison of medians and reported as median (interquartile range).