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Table 6 Relative risk of daily mortality and EHAs for percentile of mean temperature in warm season a by diseases and age groups

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

Respiratory

≥99%

1.70 [1.04 - 2.80]

1.35 [1.16 - 1.58]

1.34 [0.80 - 2.23]

1.30 [1.11 - 1.52]

≥98%

1.75 [1.24 - 2.48]

1.19 [1.07 - 1.33]

1.49 [1.04 - 2.14]

1.14 [1.02 - 1.28]

≥97%

1.55 [1.15 - 2.08]

1.13 [1.03 - 1.24]

1.37 [1.00 - 1.87]

1.10 [1.00 - 1.21]

≥96%

1.45 [1.15 - 1.83]

1.14 [1.07 - 1.22]

1.34 [1.05 - 1.72]

1.12 [1.04 - 1.20]

≥95%

1.42 [1.13 - 1.79]

1.14 [1.07 - 1.21]

1.32 [1.04 - 1.69]

1.11 [1.04 - 1.19]

≥90%

1.33 [1.11 - 1.58]

1.08 [1.03 - 1.13]

1.31 [1.09 - 1.58]

1.07 [1.01 - 1.12]

Cardiovascular

≥99%

1.90 [1.56 - 2.33]

1.04 [0.90 - 1.20]

1.81 [1.47 - 2.23]

1.04 [0.89 - 1.20]

≥98%

1.46 [1.24 - 1.72]

1.07 [0.98 - 1.18]

1.38 [1.16 - 1.63]

1.06 [0.97 - 1.17]

≥97%

1.50 [1.32 - 1.71]

1.00 [0.92 - 1.08]

1.41 [1.23 - 1.62]

0.99 [0.92 - 1.08]

≥96%

1.36 [1.23 - 1.51]

0.99 [0.94 - 1.05]

1.28 [1.15 - 1.43]

0.99 [0.93 - 1.05]

≥95%

1.37 [1.24 - 1.51]

1.00 [0.95 - 1.06]

1.29 [1.16 - 1.43]

1.00 [0.94 - 1.06]

≥90%

1.23 [1.14 - 1.33]

0.98 [0.94 - 1.02]

1.16 [1.07 - 1.26]

0.98 [0.94 - 1.02]

0 - 64 age group

≥99%

1.49 [1.03 - 2.15]

1.13 [1.05 - 1.22]

1.49 [1.02 - 2.17]

1.06 [0.98 - 1.14]

≥98%

1.28 [0.97 - 1.69]

1.14 [1.08 - 1.19]

1.26 [0.95 - 1.68]

1.08 [1.03 - 1.14]

≥97%

1.19 [0.94 - 1.50]

1.11 [1.07 - 1.16]

1.16 [0.92 - 1.48]

1.07 [1.03 - 1.12]

≥96%

1.20 [1.00 - 1.43]

1.12 [1.08 - 1.15]

1.17 [0.97 - 1.41]

1.10 [1.07 - 1.13]

≥95%

1.21 [1.02 - 1.43]

1.11 [1.08 - 1.14]

1.18 [0.98 - 1.41]

1.10 [1.06 - 1.13]

≥90%

1.13 [0.99 - 1.28]

1.06 [1.03 - 1.08]

1.09 [0.95 - 1.24]

1.07 [1.04 - 1.09]

65 - 74 age group

≥99%

1.38 [0.96 - 1.99]

1.21 [1.04 - 1.41]

1.41 [0.96 - 2.05]

1.24 [1.06 - 1.45]

≥98%

1.11 [0.83 - 1.48]

1.10 [0.99 - 1.22]

1.10 [0.82 - 1.49]

1.11 [0.99 - 1.24]

≥97%

1.13 [0.90 - 1.41]

1.12 [1.03 - 1.22]

1.09 [0.86 - 1.39]

1.14 [1.04 - 1.24]

≥96%

1.13 [0.95 - 1.35]

1.08 [1.01 - 1.15]

1.09 [0.91 - 1.31]

1.09 [1.02 - 1.16]

≥95%

1.11 [0.93 - 1.32]

1.07 [1.01 - 1.14]

1.06 [0.89 - 1.27]

1.08 [1.01 - 1.15]

≥90%

1.01 [0.89 - 1.15]

1.02 [0.97 - 1.07]

0.94 [0.82 - 1.08]

1.02 [0.97 - 1.07]

75 and over age group

≥99%

1.66 [1.39 - 1.98]

1.55 [1.41 - 1.71]

1.51 [1.26 - 1.81]

1.39 [1.26 - 1.54]

≥98%

1.43 [1.25 - 1.64]

1.40 [1.31 - 1.50]

1.33 [1.15 - 1.53]

1.29 [1.20 - 1.39]

≥97%

1.43 [1.29 - 1.60]

1.31 [1.24 - 1.39]

1.33 [1.19 - 1.49]

1.23 [1.16 - 1.31]

≥96%

1.36 [1.25 - 1.48]

1.25 [1.19 - 1.30]

1.29 [1.18 - 1.41]

1.21 [1.15 - 1.26]

≥95%

1.36 [1.25 - 1.47]

1.24 [1.19 - 1.29]

1.28 [1.17 - 1.40]

1.21 [1.16 - 1.26]

≥90%

1.26 [1.18 - 1.34]

1.13 [1.09 - 1.16]

1.21 [1.13 - 1.29]

1.14 [1.10 - 1.17]

  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. Bold typeface indicates statistical significance at p<0.05.