Fig. 1

Kaplan Meier type survival curves for out-of-hospital cardiac arrest patients stratified by bystander CPR in different age groups. a Group 1 (Age ≦75); b Group 2 (Age > 75)

Kaplan Meier type survival curves for out-of-hospital cardiac arrest patients stratified by bystander CPR in different age groups. a Group 1 (Age ≦75); b Group 2 (Age > 75)