Table 4 Associations of maternal exposure to Wenchuan earthquake with adverse birth outcomes among livebirths
| Â | Adjusted Risk Ratioa (95% Confidence Interval, P value) | |
|---|---|---|
Birth outcome | Model 1 (All livebirths) | Model 2 (Singleton livebirths) |
Total | ||
 Preterm birth | 1.27 (1.06–1.51, 0.009) | 1.24 (1.02–1.50, 0.031) |
 Low birth weight | 1.09 (0.89–1.33, 0.427) | 1.02 (0.81–1.27, 0.857) |
 Small for gestational age | 0.91 (0.69–1.20, 0.505) | 0.89 (0.66–1.19, 0.417) |
Girls | ||
 Preterm | 1.06 (0.81–1.40, 0.675) | 1.04 (0.77–1.41, 0.798) |
 Low birth weight | 0.98 (0.73–1.31, 0.871) | 0.93 (0.67–1.29, 0.676) |
 Small for gestational age | 0.85 (0.54–1.35, 0.499) | 0.83 (0.52–1.34, 0.451) |
Boys | ||
 Preterm | 1.47 (1.18–1.84, 0.001) | 1.43 (1.12–1.82, 0.004) |
 Low birth weight | 1.22 (0.93–1.61, 0.154) | 1.13 (0.83–1.54, 0.420) |
 Small for gestational age | 0.99 (0.80–1.22, 0.913) | 0.96 (0.78–1.20, 0.738) |