Table 3.
Associations between ambient heat and stillbirth in OneFlorida, 2012-2017 (n=1,876).
| Adjusteda OR (95% CI) | ||||||
|---|---|---|---|---|---|---|
| Unstratified | Stratified by NDI | Stratified by Race/ethnicity | ||||
| NDI (Quartile 4) | NDI (Quartiles 1-3) | Non-Hispanic White | Non-Hispanic Black | Hispanics | ||
| n | 1,876 | 460 | 1,416 | 614 | 732 | 368 |
| Average Heat Index (Lag 1-7 day) | ||||||
| Continuous | ||||||
| Each 1°F increase | 1.00 (0.99, 1.01) | 1.00 (0.98, 1.03) | 1.00 (0.99, 1.02) | 1.00 (0.98, 1.02) | 1.01 (0.99, 1.02) | 1.01 (0.98, 1.04) |
| Each 1°C increase | 1.00 (0.98, 1.02) | 1.00 (0.97, 1.05) | 1.00 (0.98, 1.03) | 0.99 (0.96, 1.03) | 1.01 (0.98, 1.04) | 1.02 (0.97, 1.07) |
| Quartiles | ||||||
| Quartile 1 (≤66.0°F / 18.9°C) | Reference | Reference | Reference | Reference | Reference | Reference |
| Quartile 2 (66.0-74.3°F / 18.9-23.5°C) | 0.9 (0.7, 1.1) | 0.9 (0.6, 1.3) | 0.9 (0.7, 1.1) | 1.0 (0.7, 1.4) | 0.8 (0.6, 1.1) | 0.9 (0.6, 1.4) |
| Quartile 3 (74.3-83.9°F / 23.5-28.8°C) | 0.9 (0.7, 1.2) | 0.7 (0.4, 1.2) | 1.0 (0.7, 1.4) | 1.1 (0.7, 1.8) | 0.9 (0.6, 1.4) | 0.8 (0.4, 1.6) |
| Quartile 4 (>83.9°F / 28.8°C) | 0.8 (0.6, 1.1) | 0.5 (0.3, 1.0) | 0.9 (0.6, 1.4) | 0.8 (0.4, 1.4) | 0.8 (0.5, 1.5) | 0.8 (0.4, 1.9) |
| 90th Percentile | ||||||
| ≤90th Percentile (≤89.5°F / 31.9°C) | Reference | Reference | Reference | Reference | Reference | Reference |
| >90th Percentile (>89.5°F / 31.9°C) | 1.2 (0.9, 1.5) | 1.5 (0.9, 2.4) | 1.1 (0.8, 1.4) | 1.3 (0.9, 1.9) | 1.6 (1.0, 2.4) | 0.9 (0.6, 1.5) |
| Maximum Heat Index Risk Level (Lag 1-7 day) | ||||||
| No warning | Reference | Reference | Reference | Reference | Reference | Reference |
| Caution | 1.0 (0.8, 1.3) | 0.8 (0.5, 1.3) | 1.1 (0.9, 1.4) | 1.1 (0.7, 1.5) | 1.0 (0.7, 1.4) | 1.1 (0.6, 1.8) |
| ≥Extreme caution | 1.0 (0.8, 1.3) | 0.9 (0.5, 1.6) | 1.1 (0.8, 1.5) | 1.0 (0.6, 1.5) | 1.0 (0.6, 1.6) | 1.0 (0.5, 1.9) |
a
Adjusted for PM2.5 and O3.