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Table 2 Incidence rate ratio (IRR), 95% confidence interval (95%CI), and p-value estimated by Generalized Estimating Equations

From: Pattern and determinants of hospitalization during heat waves: an ecologic study

  HD RD FF CD
  IRR a (95%CI) p-value IRR a (95%CI) p-value IRR a (95%CI) p-value IRR a (95%CI) p-value
Days outside heatwaves Reference   Reference   Reference   Reference  
Heatwave 1-2002, 1st part 1.65 (1.08 – 2.50) 0.019 1.07 (0.89 – 1.29) 0.441 1.13 (0.84 – 1.52) 0.410 1.03 (0.94 – 1.12) 0.593
Heatwave 1-2002, 2nd part 2.35 (1.70 – 3.25) 0.000 1.37 (1.18 – 1.59) 0.000 1.01 (0.77 – 1.33) 0.951 1.07 (0.99 – 1.17) 0.090
Heatwave 1-2003, 1st part 1.56 (1.04 – 2.36) 0.033 1.30 (1.11 – 1.53) 0.001 1.14 (0.85 – 1.52) 0.384 1.06 (0.97 – 1.16) 0.187
Heatwave 1-2003, 2nd part 3.78 (2.70 – 5.30) 0.000 1.76 (1.49 – 2.07) 0.000 0.87 (0.60 – 1.27) 0.472 1.17 (1.05 – 1.30) 0.003
Heatwave 2-2003 1.17 (0.73 – 1.89) 0.510 1.00 (0.84 – 1.20) 0.993 1.17 (0.88 – 1.55) 0.278 1.01 (0.92 – 1.10) 0.879
Heatwave 3-2003 1.04 (0.60 – 1.83) 0.889 1.22 (1.01 – 1.46) 0.036 0.95 (0.67 – 1.36) 0.788 1.04 (0.94 – 1.14) 0.469
Heatwave 4-2003, 1st part 1.57 (1.02 – 2.41) 0.038 1.14 (0.95 – 1.35) 0.157 1.11 (0.83 – 1.50) 0.478 0.87 (0.79 – 0.96) 0.006
Heatwave 4-2003, 2nd part 2.33 (1.62 – 3.53) 0.000 1.45 (1.23 – 1.71) 0.000 1.07 (0.79 – 1.44) 0.673 0.99 (0.89 – 1.09) 0.801
Heatwave 4-2003, 3rd part 4.55 (3.51 – 5.90) 0.000 1.75 (1.53 – 2.01) 0.000 0.97 (0.72 – 1.32) 0.862 0.96 (0.88 – 1.05) 0.402
  1. HD = heat disease; RD = respiratory disease; FF = fractures of femur; CD = circulatory disease
  2. a adjusted for day of week