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Table 7 Relative risk of daily mortality and EHAs for percentile of mean temperature in warm season a under different heatwave definitions

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

Intensity of percentile

RR [95% CI]b

RR [95% CI]c

RR [95% CI]d

Deaths

EHAs

Deaths

EHAs

Deaths

EHAs

Lag 0

≥98%

1.28 [1.14 - 1.43]

1.14 [1.10 - 1.19]

1.30 [1.08 - 1.56]

1.21 [1.14 - 1.29]

n/a

n/a

≥95%

1.22 [1.14 - 1.32]

1.12 [1.10 - 1.15]

1.27 [1.17 - 1.38]

1.15 [1.12 - 1.18]

1.19 [1.07 - 1.32]

1.15 [1.11 - 1.19]

≥90%

1.14 [1.08 - 1.20]

1.08 [1.06 - 1.10]

1.15 [1.08 - 1.22]

1.08 [1.05 - 1.10]

1.19 [1.11 - 1.27]

1.08 [1.06 - 1.10]

Lag 1

≥98%

1.33 [1.18 - 1.49]

1.16 [1.11 - 1.20]

1.35 [1.12 - 1.62]

1.27 [1.19 - 1.35]

n/a

n/a

≥95%

1.20 [1.12 - 1.30]

1.12 [1.09 - 1.14]

1.32 [1.21 - 1.43]

1.15 [1.12 - 1.18]

1.22 [1.10 - 1.35]

1.15 [1.11 - 1.19]

≥90%

1.11 [1.05 - 1.17]

1.08 [1.06 - 1.09]

1.17 [1.10 - 1.24]

1.07 [1.05 - 1.09]

1.21 [1.13 - 1.29]

1.07 [1.05 - 1.10]

Lag 2

≥98%

1.36 [1.21 - 1.52]

1.15 [1.11 - 1.20]

1.48 [1.24 - 1.76]

1.33 [1.25 - 1.42]

n/a

n/a

≥95%

1.14 [1.06 - 1.23]

1.11 [1.08 - 1.13]

1.22 [1.13 - 1.33]

1.15 [1.12 - 1.18]

1.22 [1.10 - 1.35]

1.13 [1.09 - 1.17]

≥90%

1.07 [1.02 - 1.13]

1.08 [1.06 - 1.10]

1.13 [1.06 - 1.20]

1.07 [1.05 - 1.09]

1.17 [1.10 - 1.25]

1.06 [1.04 - 1.08]

Lags 0 - 2

≥98%

1.30 [1.19 - 1.42]

1.13 [1.10 - 1.16]

1.30 [1.12 - 1.50]

1.24 [1.18 - 1.30]

n/a

n/a

≥95%

1.17 [1.10 - 1.25]

1.10 [1.08 - 1.13]

1.24 [1.15 - 1.33]

1.13 [1.11 - 1.16]

1.19 [1.09 - 1.30]

1.13 [1.10 - 1.17]

≥90%

1.11 [1.06 - 1.16]

1.08 [1.06 - 1.10]

1.15 [1.09 - 1.22]

1.06 [1.05 - 1.08]

1.19 [1.13 - 1.27]

1.07 [1.05 - 1.09]

  1. EHAs emergency hospital admissions, RR relative risk, CI confidence interval.
  2. aWarm season: 1st Nov. to 31st Mar. (next year).
  3. bHeatwave defined as ≥ 2 consecutive days above the percentiles of daily mean temperature.
  4. cHeatwave defined as ≥ 3 consecutive days above the percentiles of daily mean temperature.
  5. dHeatwave defined as ≥ 4 consecutive days above the percentiles of daily mean temperature.