Table 3.
Deaths in Maricopa County 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.
| <65 Years | ≥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 | 93 (0) | 1.19 | 1.15, 1.24 | 90 (0) | 1.21 | 1.15, 1.26 |
| Possible consequences of heat ordehydration | 106 (0) | 1.12 | 1.02, 1.23 | |||
| Cardiac disease/stroke | 106 (1) | 1.03 | 1.00, 1.05 | 109 (1) | 1.03 | 1.01, 1.05 |
| Chronic obstructive pulmonary diseases (COPD)/asthma | 110 (0) | 1.05 | 1.00, 1.10 | |||
| All causes b | 104 (1) | 1.01 | 1.00, 1.02 | 107 (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).