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