Fig. 1.

Odds ratio and 95% confidence intervals of the occurrence of out-of-hospital cardiac arrest with cardiac etiology by temperature. Adjustment variables were daily means of relative humidity, atmospheric pressure, and wind speed and daily amount of precipitation and hours of daylight. *P < 0.05. a Total. b Age 40–<60 years. c Age 60–<70 years. d Age 70–<80 years. e Age 80–<90 years. f Age ≥90 years