Supplementary Table S3: Correlation coefficients calculated between IMFs and original data series of arrhythmic and normal subjects.

The correlation coefficient between the IMFs of and the original signal (see the description of Supplementary Table S2) was calculated to identify the IMFs with the real components of the original signal (see Supplementary Table S1). The correlation coefficients were calculated using the following equations as described by Wharton et al., 2013 and Jha et al., 2006.