Table 3.
Outcomes of 4653 births from pregnancies to mothers residing in the Palermo metropolitan area and of 3980 births from pregnancies to Sicilian women residing in the remaining metropolitan areas (comparison group), conceived between 36 weeks before and 4 weeks after 29 July, 2012
| Birth outcome | Palermo exposed metropolitan area | Remaining metropolitan areas (Catania and Messina) |
Unadjusted OR | Adjusted OR | ||
| N (%) | N (%) | |||||
| All births | 4653 (100) | 3980 (100) | OR | (95% CI) | OR* | (95% CI) |
| Gender | ||||||
| Male | 2350 (50.51) | 2040 (51.26) | 1 (ref.) | 1 (ref.) | ||
| Female | 2303 (49.49) | 1940 (48.74) | 1.03 | (0.94 to 1.12) | 1.03 | (0.94 to 1.12) |
| Plurality | ||||||
| Singleton birth | 4492 (96.54) | 3829 (96.21) | 1 (ref.) | 1 (ref.) | ||
| Multiple birth | 161 (3.46) | 151 (3.79) | 0.91 | (0.72 to 1.14) | 0.91 | (0.72 to 1.14) |
| Status at birth | ||||||
| Live births | 4636 (99.63) | 3966 (99.65) | 1 (ref.) | 1 (ref.) | ||
| Stillbirths | 17 (0.37) | 14 (0.35) | 1.04 | (0.51 to 2.11) | 1.03 | (0.51 to 2.10) |
| Singleton live births | 4492 (100) | 3829 (100) | OR | (95% CI) | OR* | (95% CI) |
| Preterm | ||||||
| (<37 weeks) | 169 (7.25) | 111 (6.75) | 1.08 | (0.84 to 1.38) | 1.08 | (0.84 to 1.39) |
| Low birth weight | ||||||
| (<2.500 gr) | 146 (6.74) | 180 (7.15) | 0.86 | (0.69 to 1.08) | 0.86 | (0.69 to 1.08) |
| Very low birth weight (<1500 gr) |
25 (1.07) | 21 (0.83) | 1.28 | (0.72 to 2.30) | 1.28 | (0.72 to 2.30) |
| Small for gestational age | 59 (2.53) | 66 (4.01) | 0.62 | (0.43 to 0.89) | 0.62 | (0.64 to 1.77) |
*OR adjusted for maternal age and infant gender (OR contrasting male and female gender adjusted for maternal age, only)