Table 2. Clinical Characteristics and Outcomes in Nulliparous Women With and Without Precipitate Labor.
| Precipitate labor | Normal group | P-value | Crude OR | 95% CI | |
|---|---|---|---|---|---|
| Total | 386 | 3776 | |||
| Maternal age | |||||
| < 20 years | 21 (5.4) | 115 (3.0) | 0.01 | 1.85 | 1.14 - 3.00 |
| 20 - 34 years | 263 (68.1) | 2,670 (70.7) | - | Reference | - |
| ≥ 35 years | 101 (26.2) | 991 (25.2) | 0.78 | 1.03 | 0.81 - 1.32 |
| Gestational age at delivery | |||||
| < 37 weeks | 53 (13.7) | 159 (4.2) | < 0.01 | 3.47 | 2.49 - 4.84 |
| 37 - 40 weeks | 293 (75.9) | 3,050 (80.8) | - | Reference | - |
| 41 - 42 weeks | 40 (10.3) | 563 (14.9) | 0.08 | 0.74 | 0.53 - 1.04 |
| Hypertensive disorders | 36 (9.3) | 174 (4.6) | < 0.01 | 2.13 | 1.46 - 3.10 |
| Glucose intolerance | 10 (2.6) | 87 (2.3) | 0.72 | 1.13 | 0.58 - 2.19 |
| Oxtocin use | 106 (27.5) | 1,353 (35.8) | < 0.01 | 0.68 | 0.54 - 0.86 |
| Placental abruption | 4 (1.0) | 58 (1.5) | 0.44 | 0.67 | 0.24 - 1.86 |
| Vacuum/forceps delivery | 56 (14.1) | 411 (12.2) | 0.05 | 1.35 | 1.00 - 1.82 |
| Neonatal birth weight | |||||
| < 2,500 g | 110 (28.5) | 349 (9.2) | 0.01 | 3.64 | 2.84 - 4.67 |
| 2,500 - 3,499 g | 293 (75.9) | 3,039 (80.5) | - | Reference | - |
| ≥ 3,500 g | 40 (10.3) | 388 (10.3) | < 0.01 | 0.39 | 0.22 - 0.68 |
| Apgar score at 1 min < 4 | 0 (0) | 14 (0.4) | 0.23 | - | - |
| Apgar score at 5 min < 7 | 1 (0.3) | 7 (0.2) | 0.75 | 1.40 | 0.17 - 11.40 |
| Umbilical artery pH < 7 | 0 (0) | 10 (0.3) | 0.31 | - | - |
| Total blood loss ≥ 1,000 mL | 28 (7.3) | 319 (8.4) | 0.42 | 0.85 | 0.57 - 1.27 |
| Hemotransfusion | 4 (1.0) | 18 (0.5) | 0.15 | 2.19 | 0.74 - 6.49 |
| Cervical laceration | 12 (3.1) | 66 (1.3) | 0.06 | 1.8 | 0.97 - 3.37 |
| Severe perineal laceration | 14 (3.6) | 141 (3.7) | 0.91 | 0.97 | 0.55 - 1.70 |
Values are expressed as number (percentage). OR: odds ratio; CI: confidence interval. Severe perineal laceration, perineal laceration either third- or fourth-degree laceration.