Table 2 Mean ± standard deviation of the iPRV and IF_resp of participants with LGD and HGD

LF × 10³ (ms²)

4.77 ± 3.00

4.61 ± 4.30

9.64 ± 8.82^§

9.33 ± 12.62^§

HF × 10³ (ms²)

4.36 ± 4.85

5.30 ± 8.46

4.94 ± 3.72

10.22 ± 13.58^§

VHF × 10³ (ms²)

7.19 ± 9.08

9.30 ± 14.19

10.34 ± 7.60

27.61 ± 41.37^*§

LF/HF ratio

2.22 ± 2.16

1.55 ± 1.03^*

2.60 ± 2.11

1.37 ± 0.56^*

nLF (%)

37.31 ± 17.44

32.02 ± 15.31

37.11 ± 14.35

27.70 ± 8.45^*

nHF (%)

23.87 ± 8.83

23.89 ± 5.96

21.26 ± 9.76

23.08 ± 7.97

nVHF (%)

38.82 ± 11.53

44.09 ± 11.93^*

41.62 ± 7.76

49.21 ± 10.04^*

IF_resp

0.19 ± 0.08

0.23 ± 0.10^*

0.14 ± 0.07^§

0.21 ± 0.10^*

Trial 2

baseline_2

stimuli_2

baseline_2

stimuli_2

LF × 10³ (ms²)

6.19 ± 6.17

4.73 ± 4.04

12.69 ± 13.81^§

6.68 ± 5.43^*

HF × 10³ (ms²)

5.50 ± 7.31

4.61 ± 4.27

7.59 ± 7.92

9.47 ± 11.20^§

VHF × 10³ (ms²)

10.11 ± 14.40

8.52 ± 8.50

16.36 ± 15.01

18.05 ± 18.17^§

LF/HF ratio

1.69 ± 1.40

1.34 ± 0.77

2.15 ± 1.10

1.03 ± 0.39^*§

nLF (%)

32.44 ± 15.44

29.79 ± 13.97

36.64 ± 10.41

23.05 ± 7.48^*§

nHF (%)

23.90 ± 6.90

24.37 ± 6.34

20.78 ± 7.93

23.91 ± 5.98

nVHF (%)

43.66 ± 11.32

45.84 ± 12.96

42.58 ± 7.00

53.05 ± 9.07^*§

IF_resp

0.22 ± 0.08

0.24 ± 0.07

0.16 ± 0.07^§

0.22 ± 0.10^*