Table S2. Pearson correlations among selected 24-h HRV measures (log-scale) in this CKD cohort.

HRV measure	ASDNN (ln ms)	Total power (ln ms2)	VLF (ln ms2)	Low frequency (ln ms2)	LF/HF ratio (ms2)
ASDNN (ms)	–	0.96**	0.81**	0.92**	–0.03
Total power (ln ms2)	0.96**	–	0.83**	0.91**	0.04
VLF (ln ms2)	0.81**	0.83**	–	0.77**	0.25**
Low frequency (ln ms2)	0.92**	0.91**	0.77**	–	0.14*
LF/HF ratio (ms2)	–0.03	0.04	0.25**	0.14*	–

*p < 0.05, **p < 0.0005.