Bland-Altman and correlation plots.

<p>(A) An example Bland-Altman plot with a mean difference of 0.002 that shows the limit of agreement of 95% (dashed lines are mean differences ± the limit of agreement) between the continuous HR of a smartphone and its corresponding ECG signal. (B) Example of a correlation plot of the continuous HR monitored from a smartphone (x-axis) and ECG (y-axis) with the regression line (solid line) and a Pearson correlation coefficient of 1 (dashed line).