TABLE 3.
Outcomes and distribution of latent phase labor, multiparous women (hours [n])
| Outcome | No/Yes | Point of distribution | P valuea | ||||
|---|---|---|---|---|---|---|---|
| Mean | Median | 80th | 90th | 95th | |||
| Amniotomy | N | 8.8 (198) | 6.5 (266) | 13.0 (110) | 18.1 (52) | 23.1 (26) | <.001 |
| Y | 13.7 (16) | 8.3 (27) | 17.4 (11) | 32.5 (6) | 52.4 (3) | ||
| Oxytocin augmentation | N | 8.0 (185) | 6.0 (249) | 12.0 (101) | 15.5 (51) | 20.5 (26) | <.001 |
| Y | 16.4 (36) | 13.5 (45) | 23.1 (18) | 31.1 (9) | 43.2 (5) | ||
| Labor dystocia diagnosis | N | 7.7 (172) | 5.9 (229) | 11.5 (92) | 14.9 (46) | 20.1 (23) | <.001 |
| Y | 15.6 (47) | 13.3 (58) | 22.4 (23) | 29.6 (12) | 39.0 (6) | ||
| Epidural | N | 7.4 (156) | 5.5 (205) | 11.5 (82) | 14.8 (41) | 18.3 (21) | <.001 |
| Y | 13.7 (63) | 10.9 (84) | 20.7 (34) | 25.5 (17) | 39.5 (9) | ||
| Cesarean delivery | N | 9.2 (205) | 6.8 (278) | 13.0 (111) | 18.2 (56) | 24.2 (28) | .147 |
| Y | 12.6 (6) | 7.3 (9) | 22.1 (4) | 23.9 (2) | 30.0 (1) | ||
| Postpartum hemorrhage | N | 9.2 (189) | 7.0 (251) | 13.5 (101) | 18.8 (50) | 23.0 (25) | .374 |
| Y | 10.3 (22) | 6.7 (36) | 14.4 (15) | 24.5 (8) | 28.0 (4) | ||
| NICU admission | N | 9.0 (206) | 6.6 (269) | 13.0 (114) | 17.3 (56) | 23.8 (27) | .006 |
| Y | 13.7 (14) | 7.5 (18) | 22.2 (7) | 28.2 (4) | 40.6 (2) | ||
| Apgar < 7 at 5 min | N | 9.2 (208) | 6.7 (284) | 13.1 (114) | 18.4 (57) | 24.1 (29) | .014 |
| Y | 19.9 (4) | 20.5 (3) | 25.2 (1) | 27.6 (1) | 28.8 (1) | ||
a
P value from t test comparing subjects with latent phase labor < mean to subjects with latent phase labor ≥ mean.