Wake up (n = 105)**

Odds Ratio

95% Confidence Interval

I woke up feeling refreshed.

I was sleepy.

(n = 81)

(n = 24)

n

%

Adjusted residual

n

%

Adjusted residual

Breakfast

(n = 105)

I eat breakfast every morning.

78

74.29

2.2

20

19.05

−2.2

5.20

1.08

25.13

I sometimes do not eat breakfast.

3

2.86

−2.2

4

3.81

2.2

Bowel movement

(n = 105)

I have bowel movement every day.

51

48.57

0.4

14

13.33

−0.4

1.21

0.48

3.07

I do not have bowel movement every day.

30

28.57

−0.4

10

9.52

0.4

School meal

(n = 105)

I always eat a full school meal.

57

54.29

0.7

15

14.29

−0.7

1.43

0.55

3.70

I sometimes leave part of a school meal.

24

22.86

−0.7

9

8.57

0.7

Snack (lunch to dinner)

(n = 105)

I eat a snack four days or more a week.

26

24.76

−2.3

14

13.33

2.3

0.34

0.13

0.86

I eat a snack less than three days a week.

55

52.38

2.3

10

9.52

−2.3

Snack (dinner to fall asleep)

(n = 105)

I eat a snack four days or more a week.

4

3.81

−0.6

2

1.90

0.6

0.57

0.10

3.33

I eat a snack less than three days a week.

77

73.33

0.6

22

20.95

−0.6

Exercise

(n = 105)

I exercise three or more days a week.

69

65.71

1.2

18

17.14

−1.2

1.92

0.63

5.81

I exercise less than two days a week.

12

11.43

−1.2

6

5.71

1.2

Cram school

(n = 105)

I am going to cram school.

42

40.00

0.5

11

10.48

−0.5

1.27

0.51

3.17

I am not going to cram school.

39

37.14

−0.5

13

12.38

0.5

Physical strength

(n = 104)

High

44

42.31

0.8

11

10.58

−0.8

1.44

0.58

3.61

Low

36

34.62

−0.8

13

12.50

0.8

Falling asleep*

(n = 93)

I could fall asleep quickly.

73

78.49

3.3

12

12.90

−3.3

42.58

4.80

377.62

I had difficulty sleeping.

1

1.08

−3.3

7

7.53

3.3