Table 2.
Length of Latent Phase and Delivery Mode
| Eventual delivery route | ||||
|---|---|---|---|---|
|
| ||||
| Time since start of oxytocin with ruptured membranes |
Labor status at end of interval (for those who started interval in the latent phase) |
Vaginal | Cesarean | |
| 0 - <3 hrs | Achieved active phase | 425/1347 (31.6) | 304/425 (71.5) | 121/425 (28.5) |
| Remain in latent phase | 918/1347 (68.2) | 547/918 (59.6) | 371/918 (40.4) | |
| Were delivered in latent phase |
4/1347 (0.3) | 0/4 (0.0) | 4/4 (100) | |
| Overall | 851/1347 (63.2) | 496/1347 (36.8) | ||
|
| ||||
| 3 - <6 hrs | Achieved active phase | 507/918 (55.2) | 340/507 (67.1) | 167/507 (32.9) |
| Remain in latent phase | 407/918 (44.3) | 207/407 (50.9) | 200/407 (49.1) | |
| Were delivered in latent phase |
4/918 (0.4) | 0/4 (0.0) | 4/4 (100) | |
| Overall | 547/918 (59.6) | 371/918 (40.4) | ||
|
| ||||
| 6 - <9 hrs | Achieved active phase | 235/407 (57.7) | 143/235 (60.9) | 92/235 (39.1) |
| Remain in latent phase | 161/407 (39.6) | 64/161 (39.8) | 97/161 (60.2) | |
| Were delivered in latent phase |
11/407 (2.7) | 0/11 (0.0) | 11/11 (100) | |
| Overall | 207/407 (50.9) | 200/407 (49.1) | ||
|
| ||||
| 9 - <12 hrs | Achieved active phase | 75/161 (46.6) | 36/75 (48.0) | 39/75 (52.0) |
| Remain in latent phase | 71/161 (44.1) | 28/71 (39.4) | 43/71 (60.6) | |
| Were delivered in latent phase |
15/161 (9.3) | 0/15 (0.0) | 15/15 (100) | |
| Overall | 64/161 (39.8) | 97/161 (60.2) | ||
|
| ||||
| 12 or more hrs | Achieved active phase | 48/71 (67.6) | 28/48 (58.3) | 20/48 (41.7) |
| Were delivered in latent phase |
23/71 (32.4) | 0/23 (0.0) | 23/23 (100) | |
| Overall | 28/71 (39.4) | 43/71 (60.6) | ||
Data are presented as proportions (percent)