Table 4.
Outcome of 536 births from pregnancies to mothers residing in the exposed extra-urban area and of 23 373 births from pregnancies to Sicilian women residing in low inhabitants density and unindustrialised areas of Sicily (comparison group), conceived between 36 weeks before and 4 weeks after July 29, 2011 (the same calendar period during the previous year)
| Birth outcome | Extra-urban exposed area | Comparison group | Unadjusted OR | Adjusted OR | ||
| N (%) | N (%) | |||||
| All births | 536 (100) | 23 373 (100) | OR | (95% CI) | OR* | (95% CI) |
| Gender | ||||||
| Male | 272 (50.75) | 12 041 (51.52) | 1 (ref.) | 1 (ref.) | ||
| Female | 264 (49.25) | 11 329 (48.57) | 1.03 | (0.87–1.22) | 1.03 | (0.87–1.22) |
| Plurality | ||||||
| Singleton birth | 520 (97.01) | 22 632 (96.83) | 1 (ref.) | 1 (ref.) | ||
| Multiple birth | 16 (2.99) | 741 (3.17) | 0.94 | (0.57–1.56) | 0.96 | (0.58–1.58) |
| Status at birth | ||||||
| Live births | 534 (99.63) | 23 291 (99.65) | 1 (ref.) | 1 (ref.) | ||
| Stillbirths | 2 (0.37) | 79 (0.34) | 1.10 | (0.27–4.50) | 1.10 | (0.27–4.50) |
| Singleton live births | OR | (95% CI) | OR* | (95% CI) | ||
| Preterm | ||||||
| (<37 weeks) | 30 (5.78) | 1226 (5.44) | 1.06 | (0.731–1.54) | 1.07 | (0.74–1.55) |
| Low birth weight | ||||||
| (<2.500 gr) | 35 (6.74) | 1226 (5.44) | 1.26 | (0.88–1.78) | 1.26 | (0.89–1.79) |
| Very low birth weight (<1500 gr) |
4 (0.77) | 133 (0.59) | 1.31 | (0.48–3.55) | 1.31 | (0.48–3.56) |
| Small for gestational age | 15 (2.89) | 616 (2.75) | 1.05 | (0.62–1.77) | 1.05 | (0.63–1.77) |
*OR adjusted for maternal age and infant gender (OR contrasting male and female gender adjusted for maternal age, only)