Table 3.
Multivariable analysis
| Adjusted Odds Ratio (95% CI)* | |
|---|---|
| Maternal BMI (kg/m2): | |
| < 30 | Reference |
| 30 – 34.9 | 1.15 (0.69 – 1.90) |
| 35 – 39.9 | 1.01 (0.45 – 2.25) |
| ≥ 40 | 2.66 (0.98 – 7.21) |
| Multiple pregnancy | 0.96 (0.42 – 2.19) |
| Parity | |
| 0 | Reference |
| ≥ 1 | 0.84 (0.53 – 1.33) |
| Type of labor | |
| Spontaneous | Reference |
| Induced | 1.40 (0.86 – 2.30) |
| Chorioamnionitis | 1.02 (0.47 – 2.22) |
| Magnesium infusion | 1.44 (0.70 – 2.97) |
| Duration of oxytocin augmentation (hr) |
|
| 0 | Reference |
| 1–7 | 0.53 (0.30 – 0.92) |
| ≥ 7.1 | 0.80 (0.45 – 1.44) |
| Duration 1st stage labor (hr) | |
| < 11 | Reference |
| 11–15.9 | 1.14 (0.58 – 2.25) |
| ≥ 16 | 1.55 (0.73 – 3.31) |
| Missing | 1.04 (0.61 – 1.78) |
| Duration 2nd stage labor (hr) | |
| 0 – 1.9 | Reference |
| 2 – 2.9 | 1.17 (0.58 – 2.37) |
| ≥ 3 | 2.32 (1.16 – 4.63) |
| Episiotomy | 1.80 (0.77 – 4.21) |
BMI = body mass index
*
Point estimates in bold represent variables independently associated with postpartum hemorrhage.