Table 3.
Results of Multivariable Adjusted Analyses: Complementary Modelsa
| Strategy A (Traditional Backward) |
Strategy B (Modified backward) |
|
|---|---|---|
| Factor | OR (95% CI) | OR (95% CI) |
| Obese (BMI≥30) | - | 2.25 (1.41, 3.62) |
| Overweight (BMI 25–30) | - | 1.48 (0.92, 2.38) |
| Normal, Underweight | - | Referent |
| Hispanic | 2.10 (1.30, 3.37) | 2.26 (1.41, 3.62) |
| White & Other | 1.59 (1.00, 2.53) | 1.48 (0.92, 2.38) |
| Black | Referent | Referent |
| Augmentation | - | 1.08 (0.56, 2.08) |
| Induction | - | 1.60 (0.80, 3.18) |
| Spontaneous | - | Referent |
| Preeclampsia | 3.15 (2.00, 4.95) | 2.61 (1.60, 4.25) |
| Twins | - | 2.64 (0.54, 12.9) |
| Chorioamnionitis | 2.83 (1.61, 4.97) | 2.42 (1.35, 4.34) |
| Hydramnios | - | 1.75 (0.65, 4.69) |
| Amnioinfusion | - | 0.53 (0.29, 0.98) |
| Anemia | - | 2.46 (0.92, 6.56) |
| Protracted 2nd Stage | - | 1.73 (0.92, 3.26) |
a
All factors without adjusted results were dropped out of the models based on the specified modeling strategies.