Table 4.
Changes in induced preterm birth and spontaneous preterm birth after Hurricane Michael among different areas
| Unadjusted model | Adjusted modela | ||||||
|---|---|---|---|---|---|---|---|
|
|
|
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| FEMA individual (Area A) | FEMA public (Area B) | not affected (Area C) | FEMA individual& (Area A) | FEMA public (Area B) | not affected (Area C) | ||
|
| |||||||
| Induced preterm birth | N | 815/12441 | 657/7729 | 23671/355137 | 815/12441 | 657/7729 | 23671/355137 |
|
| |||||||
| RR (95%CI) | 1.003 (0.878, 1.145) |
1.156 (0.998, 1.339) |
1.024 (0.999, 1.050) |
0.986 (0.864, 1.125) |
1.116 (0.965, 1.291) |
1.015 (0.991, 1.040) |
|
|
| |||||||
| p for interaction b | 0.758 | 0.111 | – | 0.673 | 0.206 | – | |
|
| |||||||
| Spontaneous preterm birth | N | 822/12448 | 408/7480 | 23737/355203 | 822/12448 | 408/7480 | 23737/355203 |
|
| |||||||
| RR (95%CI) | 0.951 (0.834, 1.086) |
1.279 (1.057, 1.548) |
0.997 (0.972, 1.021) |
0.931 (0.817, 1.062) |
1.254 (1.037, 1.517) |
1.002 (0.978, 1.027) |
|
|
| |||||||
| p for interaction b | 0.499 | 0.011 | – | 0.285 | 0.021 | – | |
a
Adjusting for: mother’s age, education, ethnicity, pre-pregnancy BMI, smoking during pregnancy, and whether in WIC program
b
RR compares the year after Hurricane Michael to the year before; p-value is for the interaction between effect of disaster and area