Fig. 5: IBI correlation analysis and the relationship of agreement between IH and ECG in the AF sample.

a Correlation between IBI and b the relationship of agreement for simultaneous IH and ECG measurements in the AF sample. The identity line in the left plot is drawn to guide the eye. The horizontal lines in the right plot depict the mean value of the difference and the 95% confidence interval region: d and d ± 1.96σ, respectively.