Table 2. Labor characteristics.
| Characteristic | Singleton gestation (n = 100,513)a |
Twin gestation (n = 891)a |
P value |
|---|---|---|---|
| Induction | 39.8 (38,795) | 40.9 (355) | .53 |
| Augmentation | 31.7 (22,423) | 28.3 (172) | .08 |
| Epidural use | 79.6 (51,826) | 82.2 (462) | .13 |
| Cervical dilation, cm | 3.7 ± 2.4 | 3.3 ± 2.2 | < .01 |
| Cervical effacement | 75.3 ± 4.1 | 75.2 ± 23.3 | .95 |
| Number of cervical examinations | 7.1 ± 3.2 | 6.9 ± 3.6 | .13 |
| Prior CD | 6.2 (5804) | 7.3 (60) | .19 |
| CD | 16.1 (16,166) | 30.5 (272) | < .01 |
| Failure to progress as indication for CD | 47.5 (7683) | 25 (68) | < .01 |
| Neonatal birthweight, g | 3326 ± 477 | 2567 ± 401 | < .01 |
CD, cesarean delivery.
a
Data expressed as mean ± SD or % (n).