. Author manuscript; available in PMC: 2016 Jul 4.

Published in final edited form as: Blood Purif. 2015 Jul 4;40(1):99–108. doi: 10.1159/000381665

Table 3.

Pearson and Spearman correlation coefficients for associations between HRV indices and measures related to heart functioning, fluid overload and physical condition for all subjects (All), and for non diabetic (ND) and diabetic (D) subjects.

Measure Characterization	Specific Measures	Cohort	Long term correlations			Complexity over different time scales		Irregularity
Measure Characterization	Specific Measures	Cohort	Detrended Fluctuation Analysis	Quadratic Detrended Fluctuation Analysis	Spectral Power Slope	Multiscale Entropy Slope Approximate Entropy	Multiscale Entropy Slope Sample Entropy	Approximate Entropy (2,0.15) ^†	Sample Entropy (2,0.15) ^†
heart functioning	LVEF (%)	All	0.12	0.17^*	0.05	0.27^§	0.25^§	−0.13	−0.09
		ND	0.17	0.18	0.10	0.26^§	0.23^*	−0.11^*	−0.02
		D	0.11	0.18	0.11	0.19	0.19	−0.15	−0.14
	Left Ventricular End-diastolic Vol. (ml)	All	−0.10	−0.12	−0.12	−0.06	−0.06	0.12	0.11
		ND	−0.12	−0.15	−0.09	−0.20^*	−0.20^*	0.23^*	0.22^*
		D	−0.05	−0.07	−0.09	0.08	0.09	−0.04	−0.04
fluid overload	ECV/TBW	All	0.13	0.08	0.23^§	−0.30^§	−0.29^§	−0.03	−0.03
		ND	0.16	0.13	0.25^*	−0.33^§	−0.30^§	−0.06	−0.06
		D	0.07	0.02	0.12	−0.18	−0.20	0.02	0.00
physical condition	Physical Functioning Scale (RAND SF-36)	All	−0.08	−0.04	−0.19^*	0.30^§	0.30^§	0.00	0.05
		ND	−0.12	−0.10	−0.18	0.30^§	0.32^§	0.04	0.08
		D	−0.02	0.01	0.03	0.05	0.07	−0.01	0.03
	Physical Health Composite (RAND SF-36)	All	0.01	0.01	−0.13	0.22^§	0.23^§	0.04	0.09
		ND	0.05	0.01	−0.09	0.22^*	0.24^*	0.00	0.03
		D	−0.04	−0.01	−0.01	0.03	0.06	0.13	0.16

^§

p-value<0.01 (dark grey);

p-value ≤0.05 (light grey)

^†

Associations for these HRV parameters summarized with Spearman correlation coefficients. All other associations summarized with Pearson correlation coefficients.