Table 9. Results of Mann-Whitney U tests of linear HRV indices comparing five age matched female and male groups (Tests III, comparison of gender differences in five different age decades).

		Females vs. Males
MA	HRV-index	25–34 years	35–44 years	45–54 years	55–64 years	65–74 years
TD	meanNN	**	NS	NS	NS	NS
	sdNN	NS	NS	NS	NS	NS
	cvNN	NS	NS	NS	NS	NS
	sdaNN1	NS	NS	NS	NS	NS
	rmssd	NS	NS	NS	NS	NS
	pNN50	NS	NS	NS	NS	NS
	pNNl20	NS	NS	NS	NS	NS
	renyi4	NS	NS	NS	NS	NS
	shannon_h	NS	NS	NS	NS	NS
FD	LF	*	*	NS	NS	NS
	HF	NS	*	**	NS	NS
	P	NS	NS	NS	NS	NS
	LF/HF	**	**	**	**	*
	LF/P	**	**	*	NS	NS
	HF/P	**	**	**	**	*
	LFn	**	**	**	**	*
	HFn	**	**	**	**	*

Abbreviations: level of significance:

****p<10⁻²⁰,

***p<10⁻¹⁰,

**p<Bonferroni criterion = 0.0007,

*p<0.01, NS, no significance; MA, method of analysis; TD, time domain; FD, frequency domain.