Variable | Parity | Â | |||
---|---|---|---|---|---|
 | 1 | 2 | 3 | ≥4 | P for trend |
 | OR (95%CI) | OR (95%CI) | OR (95%CI) | OR (95%CI) |  |
Crude | 1 | 1.86 (1.25, 2.77) | 3.01(1.96, 4.62) | 3.19 (1.92, 5.29) | < 0.001 |
Model 1 | 1 | 1.51 (0.99, 2.30) | 2.12 (1.30, 3.46) | 2.10 (1.18, 3.75) | 0.004 |
Model 2 | 1 | 1.52(0.98, 2.37) | 2.14(1.26, 3.64) | 2.13(1.13, 4.01) | 0.009 |
Model 3 | 1 | 1.40 (0.89, 2.20) | 2.00 (1.16, 3.44) | 1.87 (0.96, 3.62) | 0.025 |
Model 4 | 1 | 1.37 (0.86,2.16) | 1.91 (1.10, 3.32) | 1.70 (0.87, 3.33) | 0.054 |