Table II.

Autonomic nervous system functions of the standing state in different student nursing years.

Variables	First year, n=22	Second year, n=35	Third year, n=23	Fourth year, n=41	Wilcoxon/Kruskal-Wallis testing result
ΔCVRR	2.57±2.13	2.38±2.56	2.76±1.71	3.35±2.09	NS
ΔLF/HF	4.20±7.47	3.94±7.88	3.60±4.39	2.60±3.61	NS
ΔCCVHF	0.57±0.41	0.46±0.40	0.48±0.65	0.38±0.71	NS
Heart rate	7.55±4.27	7.47±4.43	7.48±3.45	8.03±4.53	NS

Data are average ± standard deviation. NS, not significant; CVRR, coefficient of variation of R-R intervals; LF, low-frequency; HF, high-frequency; CCVHF, coefficient of component variance for HF.