Fig. 6

Correlation plots and Bland–Altman plots for DBP and SBP estimation during cold pressor test. a Reference DBP plotted against estimated DBP using the proposed method (R = 0.921). b Reference SBP plotted against estimated SBP using the proposed method (R = 0.914). c Bland–Altman plot of the estimated DBP using the proposed method with mean difference marked in solid red line and ± 1.96 standard deviation marked in dashed black lines. d Bland–Altman plot of the estimated SBP using the proposed method with mean difference marked in solid red line and ± 1.96 standard deviation marked in dashed black lines