Table 4.
Deaths in Maricopa County male residents ages <65 years and ≥65 years directly caused by exposure to environmental heat and other causes potentially related to high temperatures during the months May–October for years 2000–2008.
| Male < 65 Years | Male ≥ 65 Years | |||||
|---|---|---|---|---|---|---|
| Cause of Death a | Threshold ATmax (°F) (Lag Days) c | RR above Threshold d |
95% CI e | Threshold ATmax (°F) (Lag Days) c | RR above Threshold d |
95% CI e |
| Direct exposure to environmental heat | 92 (0) | 1.19 | 1.15, 1.24 | 90 (0) | 1.21 | 1.14, 1.29 |
| Possible consequences of heat or dehydration | 106 (0) | 1.18 | 1.06, 1.33 | |||
| Other respiratory diseases | 109 (0) | 1.09 | 1.01, 1.16 | |||
| All causes b | 102 (1) | 1.01 | 1.00, 1.02 | |||
a See Supplemental Material and Supplemental Table S1 for ICD-10 codes and keywords included in cause-of-death categories; b Excludes deaths from external causes (see Table 2); c Coefficient for ATmax (appropriate lag) has p-value < 0.05 in best fitting Poisson regression model (Pearson chi squared/df); d Relative risk (RR) is the effect estimate for the increase in mortality per 1 °F above the threshold temperature; e Confidence interval (CI).