Fig. 3
From: Extreme temperature and out-of-hospital-cardiac-arrest. Nationwide study in a hot climate country
An association of heat index with OHCA events. Figures in the upper row represent the incremental effect of exposure to heat index below the 10th percentile (10) and above the 90th percentile (25.8) as compared to the median value of 18.4 over the course of 72 h prior to the event onset. The figures in the second row show the cumulative effect of the respective exposures. The bottom figure represents an incremental effect of exposure to heat index at 6 h prior to the onset