Fig. 4
From: Comparison of HRV indices obtained from ECG and SCG signals from CEBS database

Linear model describing the correlation between pNN50 derived from SCG and pNN50 calculated from SCG using tested algorithm
From: Comparison of HRV indices obtained from ECG and SCG signals from CEBS database
Linear model describing the correlation between pNN50 derived from SCG and pNN50 calculated from SCG using tested algorithm