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Table 4 Mean daily emergency department presentations and relative risks by demographic characteristics, December to February 2000 to 2012

From: The impact of heatwaves on emergency department visits in Brisbane, Australia: a time series study

  HWD1 HWD2
  Non-hot Single hot Heatwave RR* Non-hot Single hot Heatwave RR*
Gender         
Female 0.19 0.89 1.60 4.55 0.21 4.00 5.60 17.79
  (95% CI) (0.16, 0.22) (0.30, 1.49) (0.40, 2.80) (3.13, 6.61) (0.18, 0.24) (2.04, 5.96) (−0.55, 11.75) (9.76, 32.43)
Male 0.27 0.89 2.23 5.32 0.31 0.50 7.00 19.65
  (95% CI) (0.23, 0.31) (0.18, 1.61) (0.97, 3.49) (3.83, 7.38) (0.27, 0.35) (−0.48, 1.48) (1.06, 12.94) (11.22, 34.42)
Age group, years         
0 to 14 0.06 0.11 0.2 3.00 0.06 0.50 0.80 29.85
  (95% CI) (0.04, 0.08) (−0.03, 0.25) (0.03, 0.37) (1.19, 7.56) (0.05, 0.07) (−0.48, 1.48) (0.07, 1.53) (7.27, 122.56)
15 to 64 0.29 1.26 1.63 3.64 0.32 3.50 4.00 7.49
  (95% CI) (0.25, 0.33) (0.58, 1.94) (0.87, 2.39) (2.56, 5.18) (0.28, 0.36) (2.52, 4.48) (0.78, 7.22) (3.93, 14.25)
65 to 74 0.05 0.26 0.67 7.29 0.06 0 2.20 23.54
  (95% CI) (0.04, 0.06) (0.01, 0.51) (0.25, 1.09) (3.93, 13.53) (0.04, 0.08) -- (0.63, 3.77) (8.99, 61.69)
75+ 0.07 0.16 1.33 9.17 0.08 0.50 5.60 37.55
  (95% CI) (0.05, 0.09) (−0.01, 0.33) (0.01, 2.65) (5.45, 15.44) (0.06, 0.1) (−0.48, 1.48) (−1.67, 12.87) (18.34, 76.86)
Indigenous status        
Indigenous 0.01 0 0.03 1.63 0.01 0 0 0
  (95% CI) (0, 0.02) -- (−0.04, 0.1) (0.14, 19.13) (0, 0.02) -- -- --
Non-indigenous 0.44 1.79 3.77 4.91 0.50 4.50 12.40 18.28
  (95% CI) (0.39, 0.49) (0.95, 2.63) (1.4, 6.14) (3.82, 6.31) (0.44, 0.56) (3.52, 5.48) (0.71, 24.09) (11.85, 28.22)
  1. *Relative risk, heatwave days versus non-heatwave days (non-hot + single hot), controlled for relative humidity, particulate matter with <10 micrometers in aerodynamic diameter, ozone, nitrogen dioxide, day of week and long-term trends. -- not applicable.