Table 3

RR of mortality by different HWDs for cumulative lag effects (lag 0–2) in three cities, 1988–2009

RR* (95% CI)
HWD†BrisbaneMelbourneSydney
Male
(all)
 99%1.32 (1.17 to 1.48)1.37 (1.22 to 1.53)NA‡
 95%1.04 (0.99 to 1.10)1.00 (0.96 to 1.04)1.03 (0.99 to 1.08)
 90%1.01 (0.97 to 1.05)1.02 (0.99 to 1.05)1.04 (1.01 to 1.06)
(0–74)
 99%1.29 (1.10 to 1.53)1.37 (1.15 to 1.63)NA
 95%1.04 (0.96 to 1.12)0.96 (0.91 to 1.02)1.07 (1.01 to 1.13)
 90%0.99 (0.93 to 1.04)1.00 (0.96 to 1.04)1.04 (1.00 to 1.08)
(75+)
 99%1.33 (1.13 to 1.56)1.38 (1.19 to 1.61)NA
 95%1.05 (0.97 to 1.13)1.04 (0.98 to 1.09)0.99 (0.92 to 1.05)
 90%1.03 (0.97 to 1.08)1.03 (0.99 to 1.07)1.03 (1.00 to 1.07)
Female
(all)
 99%1.45 (1.30 to 1.61)1.57 (1.41 to 1.74)NA
 95%1.13 (1.07 to 1.19)1.11 (1.07 to 1.15)1.03 (0.98 to 1.07)
 90%1.06 (1.02 to 1.10)1.05 (1.02 to 1.07)1.05 (1.03 to 1.08)
(0–74)
 99%1.08 (0.86 to 1.34)1.46 (1.18 to 1.81)NA
 95%1.06 (0.96 to 1.17)1.10 (1.03 to 1.18)0.97 (0.90 to 1.05)
 90%1.04 (0.96 to 1.11)1.04 (0.99 to 1.09)1.04 (0.99 to 1.09)
(75+)
 99%1.61 (1.42 to 1.82)1.63 (1.44 to 1.85)NA
 95%1.15 (1.08 to 1.22)1.12 (1.07 to 1.17)1.06 (1.01 to 1.12)
 90%1.07 (1.02 to 1.12)1.05 (1.01 to 1.08)1.06 (1.03 to 1.09)
Total
 99%1.40 (1.29 to 1.51)1.47 (1.36 to 1.59)NA
 95%1.09 (1.05 to 1.13)1.06 (1.03 to 1.09)1.03 (1.00 to 1.07)
 90%1.04 (1.01 to 1.07)1.03 (1.01 to 1.05)1.04 (1.03 to 1.06)

  • Adjusted for relative humidity, days of week and population size.

  • *Relative risk (RR).

  • †HWDs were defined as different centiles (ie, 90th, 95th or 99th centile) of mean temperature for two or more consecutive days in the summer season.

  • ‡Not applicable.

  • HWD, heatwave definition.

    Bold typeface indicates statistical significance at p<0.05.