Mortality IRRs and 95% CIs: IRRs are based on the daily incidence of mortality during the 2009 and the 2014 heatwaves compared with the incidence during non-heatwave periods in metropolitan Adelaide in summer (October–March)
| Mortality | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| All ages IRR (95% CI) | 0–4 IRR (95% CI) | 5–14 IRR (95% CI) | 15–64 IRR (95% CI) | 65–74 IRR (95% CI) | 75+ IRR (95% CI) | Observed cases | Excess/reduction of cases (95% CI) | Difference between 2009 and 2014 (95% CI) | |
| Total 2009 | #1.11 (1.00 to 1.24) | 1.49 (0.53 to 4.18) | 4.33 (0.45 to 41.66) | *1.44 (1.14 to 1.82) p=0.002 | 1.16 (0.86 to 1.56) | 1.01 (0.88 to 1.16) | 347 | 34.5 (0.2 to 68.9) | 3.7 (−45.3 to 52.6) |
| Total 2014 | *1.12 (1.00 to 1.24) p=0.04 | 0.69 (0.09 to 5.13) | #1.25 (0.98 to 1.61) | 0.99 (0.72 to 1.35) | 1.11 (0.98 to 1.27) | 364 | *38.2 (3.3 to 73.1) p=0.03 | ||
| 2014:2009 | 1.01 (0.86 to 1.17) | 0.46 (0.048 to 4.44) | 0.87 (0.62 to 1.22) | 0.85 (0.55 to 1.31) | 1.10 (0.91 to 1.33) | ||||
Bold typeface indicates significance at p<0.001.
The IRRs of 2014 and 2009 were compared to estimate the statistical significance of differences between the two heatwave episodes. *p<0.05; **p<0.001; #p<0.1.
IRR, incidence rate ratio.