With low-sleep-quality

Without low-sleep-quality

p-value

n = 44

n = 76

Sleep duration (hours) †

6.2 (6, 5.4 - 7)

7.3 (7, 7 - 8)

<0.0001 §

PSQI-J score †

8.2 (8, 6.8 - 9)

3.0 (3, 2 - 4)

<0.0001 §

Days of skipping breakfast (days/week) †

2.8 (2, 0 - 6)

1.7 (0, 0 - 3)

0.022 §

Days of skipping lunch (days/week) †

0.8 (0, 0 - 0.3)

0.8 (0, 0 - 0)

0.594 §

Days of skipping dinner (days/week) †

0.6 (0, 0 - 0)

0.6 (0, 0 - 0)

0.44 §

Days of eating out at morning (days/week) †

0.9 (0, 0 - 0.3)

1.1 (0, 0 - 1)

0.466 §

Days of eating out at lunch (days/week) †

3.0 (3, 0 - 5)

3.1 (3, 1 - 5)

0.77 §

Days of eating out at dinner (days/week) †

2.0 (1, 0 - 3)

1.6 (0, 0 - 3)

0.197 §

Days of exercise per week (days/week) †

0.7 (0, 0 - 1)

1.2 (0, 0 - 2)

0.032 §

Current drinking ‡

Yes

23

34

No

21

42

0.453 ¶

Current smoking ‡

Yes

6

6

No

38

70

0.353 ¶