Emergency IRRs and 95% CIs: IRRs are based on the daily incidence of emergency presentations during the 2009 and the 2014 heatwaves compared with the incidence during non-heatwave periods in metropolitan Adelaide in summer (October–March)
| Emergency presentation | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| All agesIRR (95% CI) | 0–4IRR (95% CI) | 5–14IRR (95% CI) | 15–64IRR (95% CI) | 65–74IRR (95% CI) | 75+IRR (95% CI) | Observed cases | Excess/reduction of cases (95% CI) | Difference between 2009 and 2014 (95% CI) | |
| Total 2009 | *1.02 (1.01 to 1.04) p=0.01 | *0.90 (0.81 to 1.00) p=0.04 | *0.83(0.71 to 0.97) p=0.02 | 1.05(0.99 to 1.12) | 1.004(0.91 to 1.11) | **1.17(1.11 to 1.22) | 12 928 | 301.7(−318.7 to 922.2) | −741.5(−1658.6 to 175.6) |
| Total 2014 | **0.97(0.95 to 0.98) | **0.83(0.75 to 0.92) | *0.78(0.66 to 0.91) p=0.002 | 1.02(0.96 to 1.09) | 0.97(0.88 to 1.07) | 0.99(0.94 to 1.03) | 12 998 | −439.8(−1115.1 to 235.6) | |
| 2014−2009 | 0.95 (0.88 to 1.01) | 0.92(0.89 to 1.07) | 0.94(0.75 to 1.18) | 0.97(089 to 1.07) | 0.97(0.84 to 1.11) | **0.85(0.79 to 0.90) | |||
| Renal 2009 | **1.39 (1.23 to 1.58) | *1.51(1.02 to 2.23) p=0.04 | 1.25(0.71 to 2.21) | **1.32(1.16 to 1.50) | 1.21(0.88 to 1.67) | **1.67(1.32 to 2.13) | 443 | **125.2(84.4 to 166.0) | −133.9**(−201.1 to −66.7) |
| Renal 2014 | 0.98 (0.85 to 1.13) | 0.82(0.51 to 1.31) | 0.84(0.45 to 1.60) | 0.97(0.84 to 1.12) | 0.78(0.55 to 1.11) | 1.15(0.88 to 1.49) | 359 | −8.7(−62.1 to 44.7) | |
| Renal 2014:2009 | **0.70 (0.58 to 0.85) | *0.54(0.29 to 1.00) p=0.048 | 0.67(0.29 to 1.59) | *0.74(0.61 to 0.89) p=0.002 | #0.64(0.40 to 1.04) p=0.07 | *0.69(0.48 to 0.98) p=0.04 | |||
| Heat-related total 2009 | **12.03 (9.23 to 15.68) | *3.36(1.54 to 7.30) p=0.002 | *3.94(1.30 to 11.94) p=0.02 | **12.41(8.69 to 17.74) | **9.48(6.13 to 14.65) | **15.85(12.49 to 20.12) | 332 | **304.4(297.0 to 311.8) | −144.8**(−159.2 to −130.4) |
| Heat-related total 2014 | **5.27 (3.81 to 7.30) | 1.23(0.49 to 3.08) | *3.91(1.40 to 10.94) p=0.009 | **6.10(4.02 to 9.25) | **4.41(2.75 to 7.06) | **6.12(4.70 to 7.97) | 197 | **159.6(147.3 to 172.0) | |
| Heat-related 2014:2009 | **0.44 (0.29 to 0.67) | 0.37(0.11 to 1.22) | 0.99(0.22 to 4.48) | *0.49(0.28 to 0.85) p=0.01 | *0.47(0.25 to 0.88) p=0.02 | **0.39(0.27 to 0.55) | |||
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.