Table 1.

PPG fiducial points and the features.

PPG fiducial point	Feature label
Onset	o2o_wt, o2s_wt, o2n_wt, o2d_wt, o2s_hr, o2n_hr, o2d_hr, s2n_hr
Systolic	s2s_wt, s2o_wt, s2n_wt, s2d_wt
Notch	n2n_wt, n2s_wt, n2o_wt, n2d_wt
Diastolic	d2d_wt, d2o_wt, d2s_wt, d2n_wt