Fig. 2

Incident rate ratios (IRR) for cardiovascular emergency hospitalization during heatwaves. All models were adjusted by age, fortnight and air pollution. Results are shown stratified by gender, age groups and cardiovascular (CV) event type. ^aAge groups used for adjustment in models restricted to population < 65 years old: 18–35, 36–55; 56–64. ^bAge groups used for adjustment in models restricted to population ≥65 years old; 65–70, 71–75, 76–80, >80