Table 4.
Odds ratios (ORs) and 95% confidence intervals for the odds of mortality (cardiovascular or respiratory) during extreme heat (EH, the 97th or 99th percentiles of mean apparent temperature over lag days 0-3) vs. non-EH among the elderly in each of 8 Michigan cities, May-September, 1990-2007.
| City | Cardiovascular | Respiratory | ||
|---|---|---|---|---|
| 97th percentile EH | 99th percentile EH | 97th percentile EH | 99th percentile EH | |
| Ann Arbor | 0.95 (0.79-1.13) | 0.89 (0.67-1.20)* | 0.97 (0.68-1.39) | 0.99 (0.56-1.74) |
| Detroit | 1.09 (1.05-1.13) | 1.17 (1.11-1.23) | 0.98 (0.90-1.06) | 1.09 (0.96-1.23) |
| Flint | 0.97 (0.87-1.08)** | 1.05 (0.88-1.25) | 0.99 (0.79-1.24) | 0.92 (0.64-1.32) |
| Grand Rapids | 1.08 (0.97-1.20) | 1.18 (0.99-1.40) | 0.99 (0.80-1.22) | 1.21 (0.87-1.68) |
| Holland | 1.10 (0.90-1.33) | 0.96 (0.70-1.34) | 1.24 (0.89-1.74) | 0.82 (0.45-1.50) |
| Kalamazoo | 1.21 (1.02-1.42) | 1.13 (0.87-1.48) | 1.20 (0.89-1.61) | 0.90 (0.53-1.54) |
| Lansing | 1.06 (0.90-1.24) | 1.06 (0.82-1.38) | 1.27 (0.93-1.73) | 1.18 (0.73-1.92) |
| Saginaw | 1.11 (0.96-1.28) | 1.11 (0.89-1.39) | 1.12 (0.83-1.50) | 0.62 (0.34-1.13)* |
Significance of city-by-EH interaction term (Detroit was reference category):
*
p < 0.10
**
p < 0.05