Fig. 4From: Association between cardiac autonomic function and physical activity in patients at high risk of sudden cardiac death: a cohort studyRelationships between HRV/PA and HRs for cardiac death and all-cause mortality. 3a) smoothing curve fitting of PA in predicting the risks of cardiac death; 3b) smoothing curve fitting of PA in predicting the risks of all-cause mortality; 3c) smoothing curve fitting of HRV in predicting the risks of cardiac death; 3d) smoothing curve fitting of HRV in predicting all-cause mortality. HR, hazard ratio; HRV, heart rate variability; PA, physical activityBack to article page