Table 2 Statistical significance test of the HRV features [14]

SDNN (ms)

78.726 ± 39.553

75.334 ± 25.261

0.619

RMSSD (ms)

44.152 ± 24.051

41.292 ± 22.752

0.004*

Kurtosis

3.35 ± 1.33

3.32 ± 1.59

0.804

Skewness

− 0.005 ± 0.278

0.167 ± 0.662

0.135

NN50 count

29.750 ± 19.015

31.260 ± 22.942

0.503

HTI

14.618 ± 4.707

14.315 ± 3.832

0.551

\(\alpha _1\)

1.078 ± 0.131

.925 ± 0.126

\( {2.88\times 10^{-15}}\)*

DOD

1.214 ± 0.149

1.262 ± 0.161

0.036*

\(\text {PEn}\)

1.730 ± 0.043

1.5814 ± 0.122

\({1.31\times 10^{-22}}\)*