Table 1 Parameters of EPG waveforms of female WBPH adult

Number of occurrences of np

15.50 ± 2.23

24.13 ± 6.08

0.216

Average duration of np (min)

3.50 ± 0.51

4.07 ± 1.09

0.609

Total duration of np (min)

57.00 ± 11.54

75.80 ± 18.76

0.377

Number of occurrences of N1

15.42 ± 2.22

24.13 ± 6.08

0.212

Number of occurrences of N2

34.33 ± 4.66

40.00 ± 10.60

0.636

Number of occurrences of N3

7.92 ± 1.69

12.50 ± 6.41

0.421

Average duration of Nc (min)

4.80 ± 2.18

3.66 ± 0.80

0.686

Total duration of Nc (min)

105.62 ± 23.06

130.16 ± 33.99

0.542

Number of occurrences of N4-a

2.75 ± 1.00

4.25 ± 1.42

0.386

Average duration of N4-a (min)

5.37 ± 1.30

4.41 ± 2.31

0.699

Total duration of N4-a (min)

14.86 ± 4.00

23.84 ± 13.88

0.472

Number of occurrences of N4-b

0.83 ± 0.21

1.75 ± 0.37

0.030

Average duration of N4-b (min)

113.44 ± 29.41

53.99 ± 27.40

0.179

Total duration of N4-b (min)

126.71 ± 29.38

82.71 ± 32.37

0.338

Number of occurrences of N4

2.75 ± 1.00

4.63 ± 1.40

0.277

Total duration of N4 (min)

141.57 ± 31.27

106.55 ± 33.39

0.467

Number of occurrences of N5

13.92 ± 3.99

16.00 ± 5.89

0.764

Average duration of N5 (min)

6.91 ± 1.58

15.14 ± 5.61

0.195

Total duration of N5 (min)

55.46 ± 11.73

96.31 ± 28.00

0.145

Percentage of Nc (N2 + N3) in the whole recording time

15.83 ± 3.21

21.06 ± 5.21

0.418

Percentage of np in the whole recording time

29.34 ± 6.40

36.16 ± 9.44

0.550

Percentage of N5 in the whole recording time

15.41 ± 3.26

26.75 ± 7.78

0.111

Percentage of N4 in the whole recording time

39.32 ± 8.69

29.60 ± 9.27

0.577

Percentage of N4-a in the whole recording time

4.13 ± 1.11

6.62 ± 3.86

0.739

Percentage of N4-b in the whole recording time

35.20 ± 8.16

22.98 ± 8.99

0.492