≥3 times

n = 161

<3 times

n = 423

p-value

≥3 times

n = 65

<3 times

n = 519

p-value

≥3 times

n = 24

<3 times

n = 560

p-value

Sleep duration

6.76 ± 1.55

6.66 ± 1.26

0.416

6.49 ± 1.59

6.71 ± 1.31

0.42

6.21 ± 1.37

6.71 ± 1.34

0.087

PSQI-J

Global score

4.88 ± 2.85

4.68 ± 2.61

0.43

4.91 ± 2.95

4.72 ± 2.64

0.761

5.00 ± 3.06

4.73 ± 2.66

0.784

Component scores

Sleep quality

(C1)

1.43 ± 0.80

1.38 ± 0.74

0.366

1.43 ± 0.73

1.39 ± 0.76

0.451

1.54 ± 0.83

1.38 ± 0.76

0.33

Sleep latency

(C2)

0.99 ± 0.90

0.86 ± 0.84

0.159

0.95 ± 0.94

0.89 ± 0.85

0.791

0.96 ± 0.86

0.89 ± 0.86

0.651

Sleep duration

(C3)

1.12 ± 0.99

1.20 ± 0.86

0.308

1.26 ± 1.02

1.17 ± 0.88

0.487

1.38 ± 1.01

1.17 ± 0.89

0.249

Sleep efficiency

(C4)

0.29 ± 0.69

0.31 ± 0.71

0.981

0.37 ± 0.84

0.29 ± 0.69

0.799

0.46 ± 0.93

0.30 ± 0.69

0.433

Sleep disturbance (C5)

0.32 ± 0.50

0.33 ± 0.50

0.976

0.32 ± 0.50

0.33 ± 0.50

0.958

0.21 ± 0.41

0.33 ± 0.50

0.255

Daytime dysfunction (C7)

0.72 ± 0.82

0.61 ± 0.76

0.157

0.57 ± 0.73

0.65 ± 0.79

0.468

0.46 ± 0.66

0.65 ± 0.78

0.247