Table 6.

Multiple regression analysis between nutritional markers and HRV parameters.

		Standardized β	B	p-Value	Adjusted R2
Albumin	Constant		0.284		0.174
	VLF	0.237	0.005	<0.001 **
	LF/HF ratio	0.157	0.032	0.001 *
	LF	0.139	0.005	0.002 *
	HF	0.128	0.010	0.005 *
Prealbumin	Constant		11.040		0.176
	VLF	0.236	0.003	<0.001 **
	LF/HF ratio	0.157	0.207	0.001 *
	LF	0.143	0.003	0.002 *
	HF	0.130	0.006	0.005 *
Transferrin	Constant		40.408		0.170
	VLF	0.230	0.089	<0.001 **
	LF/HF ratio	0.156	5.485	0.001 *
	LF	0.140	0.081	0.002 *
	HF	0.131	0.171	0.005 *

Variables are based on their order of listing in multiple regression analysis. * p < 0.05, ** p < 0.001. HRV, heart rate variability; B, regression coefficient; VLF, very low frequency; LF, low frequency; HF, high frequency; SDNN, standard deviation of intervals of all normal beats; SDANN, standard deviation of five-minute mean R-R interval; ASDNN, mean of five-minute standard deviations of intervals; rMSSD, root mean square of the difference of successive R-R intervals; pNN50, percentage of intervals that were more than 50 ms different from the previous interval.