Table 2.
Outcomes of births from pregnancies to mothers residing in the exposed extra-urban area and of births from pregnancies to Sicilian women residing in similar low population density, low industrialisation areas (comparison groups) by susceptibility subperiods
| Birth outcome | Pregnancy stage as of the beginning of the fire (29 July, 2012) | |||||||||||
| Periconception | I Trimester (12–0 weeks) | II Trimester (24–13 weeks) | III Trimester (36–25 weeks) | |||||||||
| Extra-urban exposed area | Comparison group |
Extra-urban exposed area | Comparison group |
Extra-urban exposed area | Comparison group |
Extra-urban exposed area | Comparison group |
|||||
| N (%)* | N (%) | OR** (95% CI) |
N (%) | N (%) | OR** (95% CI) |
N (%)* | N (%)* | OR** (95% CI) |
N (%) | N (%) | OR** (95% CI) |
|
| All births | 42 (100) | 2051 (100) | 144 (100) | 6000 (100) | 173 (100) | 6757 (100) | 187 (100) | 7352 (100) | ||||
| Gender | 6 (0,1)* | |||||||||||
| Male | 27 (64) | 1054 (51) | 1 (ref.) | 82 (57) | 3129 (52) | 1 (ref.) | 88 (51) | 3430 (51) | 1 (ref.) | 101 (54) | 3755 (51) | 1 (ref.) |
| Female | 15 (36) | 997 (49) | 0.59 (0.31 to 1.11) |
62 (43) | 2870 (48) | 0.82 (0.59 to 1.15) |
85 (49) | 3327(49) | 0.99 (0.74 to 1.35) |
86 (46) | 3591(49) | 0.89 (0.67 to 1.19) |
| Plurality | ||||||||||||
| Singleton birth | 42 (100) | 1993 (97) | 1 (ref.) | 142 (99) | 5793 (97) | 1 (ref.) | 168 (97) | 6535 (97) | 1 (ref.) | 173 (93) | 7099 (97) | 1 (ref.) |
| Multiple birth | 0 (0.0) | 58 (2.8) | 0 (-) | 2 (1.4) | 97 (3.4) | 0.4 (0.09 to 1.62) |
5 (2.9) | 222 (3.3) | 0.89 (0.36 to 2.18) |
14 (7.5) | 253 (3.4) |
2.42
(1.38 to 4.24) |
| Status at birth | 8 (0,11)* | |||||||||||
| Live births | 42 (100) | 2.046 (99.8) | 1 (ref.) | 144 (100) | 5989 (99.8) | 1 (ref.) | 173 (100) | 6730 (99.7) | 1 (ref.) | 184 (98.4) | 7318 (99.54) | 1 (ref.) |
| Stillbirths | 0 (0.0) | 5 (0.2) | 0 (-) | 0 (0.0) | 10 (0.2) | 0 (-) | 0 (0.0) | 23 (0.34) | 0 (-) | 3 (1.6) | 26 (0.35) |
4.69
(1.40 to 15.6) |
| Singleton live births | 42 (100) | 1983 (100) |
OR**
(95% CI) |
142 (100) | 5788 (100) |
OR**
(95% CI) |
168 (100) | 6435 (100) |
OR**
(95% CI) |
172 (100) | 7075 (100) |
OR**
(95% CI) |
| Preterm | ||||||||||||
| (<37 weeks) | 36 (7.14) | 94 (4.81) | 1.46 (0.44 to 4.83) |
11 (7.75) | 295 (5.16) | 1.52 (0.81 to 2.85) |
11 (6.55) | 352 (5.47) | 1.21 (0.65 to 2.26) |
11 (6.43) | 343 (4.88) | 1.35 (0.73 to 2.51) |
| Very preterm | ||||||||||||
| (<32 weeks) | 2 (4,76) | 18 (0,92) | 3,99 (0.90 to 17.66) |
3 (2,11) | 43 (0,75) | 2,88 (0,88 to 9,39) |
0 | 42 (0,65) | - | 3 (1,75) | 39 (0,55) |
3,41
(1,04 to 11,16) |
| Low birth weight (<2500 g) |
2 (4.76) | 116 (5.85) | 0.83 (0.20 to 3.48) |
12 (8.45) | 327 (5.65) | 1.57 (0.86 to 2.88) |
11 (6.55) | 353 (5.42) | 1.22 (0.66 to 2.27) |
12 (6.98) | 341 (4.82) | 1.52 (0.83 to 2.76) |
| Very low birth weight (<1500 g) |
2 (4.76) | 20 (1.01) |
4.64
(1.04 to 20.6) |
3 (2.11) | 34 (0.59) |
3.66
(1.11 to 12.1) |
0 (0.0) | 37 (0.57) | 0 (-) | 2 (1.16) | 39 (0.55) | 2.18 (0.52 to 9.12) |
| Small for gestational age | 0 (0.0) | 61 (3.1) | 0 (-) | 4 (2.82) | 167 (2.92) | 1.00 (0.36 to 2.74) |
5 (2.98) | 173 (2.69) | 1.11 (0.45 to 2.75) |
6 (3.51) | 175 (2.49) | 1.45 (0.63 to 3.31) |
*Number and percentage of non-missing values **OR adjusted for maternal age and infant gender (OR contrasting male and female gender adjusted for maternal age, only)