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Table 5 Relative risk of daily mortality and EHAs for percentile of mean temperature in early and late parts of warm season a

From: Development of health risk-based metrics for defining a heatwave: a time series study in Brisbane, Australia

Intensity of percentile

Unadjusted RR [95% CI]

AdjustedbRR [95% CI]

Deaths

EHAs

Deaths

EHAs

Early warm seasonc

≥99%

1.10 [0.82 - 1.46]

1.12 [1.02 - 1.22]

1.04 [0.78 - 1.40]

1.08 [0.98 - 1.18]

≥98%

1.24 [1.03 - 1.48]

1.17 [1.11 - 1.24]

1.19 [1.00 - 1.43]

1.14 [1.08 - 1.20]

≥97%

1.12 [0.96 - 1.31]

1.14 [1.09 - 1.20]

1.08 [0.91 - 1.27]

1.11 [1.06 - 1.17]

≥96%

1.18 [1.05 - 1.33]

1.13 [1.09 - 1.17]

1.14 [1.01 - 1.29]

1.11 [1.07 - 1.15]

≥95%

1.18 [1.05 - 1.33]

1.14 [1.10 - 1.18]

1.14 [1.01 - 1.29]

1.12 [1.08 - 1.16]

≥90%

1.09 [1.00 - 1.18]

1.06 [1.04 - 1.09]

1.05 [0.97 - 1.15]

1.07 [1.04 - 1.10]

Late warm seasond

≥99%

1.88 [1.58 - 2.24]

1.35 [1.26 - 1.44]

1.71 [1.42 - 2.07]

1.20 [1.11 - 1.29]

≥98%

1.43 [1.24 - 1.66]

1.23 [1.17 - 1.30]

1.29 [1.11 - 1.51]

1.14 [1.08 - 1.20]

≥97%

1.48 [1.33 - 1.65]

1.19 [1.14 - 1.24]

1.35 [1.20 - 1.52]

1.13 [1.08 - 1.18]

≥96%

1.37 [1.25 - 1.50]

1.16 [1.12 - 1.19]

1.26 [1.15 - 1.39]

1.14 [1.10 - 1.17]

≥95%

1.35 [1.24 - 1.47]

1.14 [1.11 - 1.17]

1.24 [1.13 - 1.37]

1.13 [1.09 - 1.16]

≥90%

1.27 [1.19 - 1.36]

1.08 [1.06 - 1.11]

1.19 [1.10 - 1.28]

1.10 [1.07 - 1.12]

  1. EHAs emergency hospital admissions, RR relative risk, CI confidence interval.
  2. aWarm season: 1st Nov. to 31st Mar. (next year).
  3. bConfounders including long-term trends, day of week, humidity, PM10, NO2 and O3.
  4. cEarly warm season: 1st Nov. to 15th Jan. (next year).
  5. dLate warm season: 16th Jan. to 31st Mar.
  6. Bold typeface indicates statistical significance at p<0.05.