Table 1.
Distribution of different characteristics in the studied population and population characteristics by oxytocin-used during first and second stage of labor
| All vaginal deliveries Number (%)N = 11,323 | No oxytocin during first/second stage of labor Number (%)N = 4,332 | Induced/augmented labor Number (%)N = 6,991 | |
|---|---|---|---|
| Maternal Age Mean (SD) | 24.69 (0.06) | 24.80 (0.09) | 24.63 (0.07) |
| Birthweight Mean (SD) | 3,238 (5.13) | 3,186 (8.93) | 3,271 (6.16) |
| Gestational Age Mean (SD) | 38.6 (0.02) | 38.4 (0.04) | 38.78 (0.02) |
| Parity | |||
| Nullipara | 4,047 (35.7) | 1,290 (29.7) | 2,757 (39.4) |
| 1 – 3 previous para | 5,622 (49.7) | 2,351 (54.3) | 3,271 (46.8) |
| More than 3 previous para | 1,654 (14.6) | 691 (16.0) | 963 (13.8) |
| Birthweight | |||
| Low birth weight (< 2,500 g) | 776 (6.8)) | 381 (8.8) | 395 (5.7) |
| Normal weight | 9,836 (86.9) | 3,703 (85.5) | 6,133 (87.7) |
| Macrosomia (> 4,000 g) | 711 (6.3) | 248 (5.7) | 463 (6.6) |
| Gestational age a | |||
| Preterm birth (less than 37 weeks) | 669 (5.9) | 328 (7.6) | 341 (4.9) |
| Term pregnancy (37 – 41 weeks) | 10,557 (93.3) | 3,980 (91.9) | 6,577 (94.1) |
| Post-term pregnancy (> 41 weeks) | 92 (0.8) | 21 (0.5) | 71 (1.0) |
| Multiple pregnancy | |||
| No | 11,280 (99.6) | 4,316 (99.6) | 6,963 (99.6) |
| Yes | 43 (0.4) | 16 (0.4) | 27 (0.4) |
| Termination | |||
| Spontaneous | 10,960 (96.8) | 4,241 (97.9) | 6,719 (96.1) |
| Operative deliveries | 363 (3.2) | 91 (2.1) | 272 (3.9) |
| Episiotomy | |||
| No | 6,818 (60.2) | 2,816 (65.0) | 4,002 (57.2) |
| Yes | 4,505 (39.8) | 1,516 (35.0) | 2,989 (42.8) |
| Tears | |||
| No | 9,312 (82.2) | 3,610 (83.3) | 5,702 (81.6) |
| First degree | 1,454 (12.8) | 577 (13.3) | 877 (12.5) |
| Second degree | 499 (4.5) | 133 (3.1) | 366 (5.2) |
| Third and fourth degree | 58 (0.5) | 12 (0.3) | 46 (0.7) |
| Active management of third stage of labor b | |||
| No | 7,235 (63.9) | 3,016 (69.7) | 4,219 (60.4) |
| Yes | 4,084 (36.1) | 1,313 (30.3) | 2,771 (39.6) |
| Retained placenta c | |||
| No | 11,174 (99.0) | 4,275 (99.1) | 6,899 (98.9) |
| Yes | 111 (1.0) | 37 (0.9) | 74 (1.1) |
a
5 missing data
b
4 missing data
c
38 missing data