Table 1.

Correlations of Test–Retest differences in HRV parameters with Test–Retest differences in HR (HR-diff) and RespRate (RespRate-diff).

Test–Retest Difference	HR-diff		RespRate-diff
	r	p	r	p
SDNN (ms)	−0.66	< 0.001	−0.50	< 0.01
RMSSD (ms)	−0.67	< 0.001	−0.41	< 0.05
pNN50 (%)	−0.64	< 0.001	−0.31	0.07
LF (ms2)	−0.49	< 0.01	−0.45	< 0.01
HF (ms2)	−0.52	< 0.01	−0.50	< 0.01
TP (ms2)	−0.58	< 0.001	−0.54	< 0.01
nLF (nu)	0.34	< 0.05	0.21	0.21
nHF (nu)	−0.34	< 0.05	−0.21	0.21
LF/HF	0.21	0.22	0.18	0.28