Characteristics | COR (95% CI) | AOR (95% CI)† |
Age (ref: ≤13 years) | ||
14 years | 1.27 (1.06 to 1.54)* | 1.24 (1.05 to 1.46)* |
15 years | 1.71 (1.38 to 2.13)*** | 1.41 (1.16 to 1.71)** |
≥16 years | 2.18 (1.76 to 2.72)*** | 1.34 (1.07 to 1.69)* |
Rural (ref:urban) | 0.97 (0.73 to 1.27) | 0.99 (0.85 to 1.15) |
Types of school (ref:middle school) | ||
Academic high school | 0.79 (0.67 to 0.93)* | 0.61 (0.49 to0.77)*** |
Vocational high school | 5.09 (4.05 to 6.40)*** | 3.71 (2.83 to 4.85)*** |
Parental marital status (ref:married) | ||
Others | 1.52 (1.37 to 1.69)*** | 1.26 (1.13 to 1.41) *** |
Paternal education (ref: middle or below) | ||
High school | 0.75 (0.68 to 0.82)*** | 0.88 (0.81 to 0.98)* |
College or above | 0.40 (0.33 to 0.48)*** | 0.69 (0.58 to 0.82)*** |
Unknown | 0.98 (0.85 to 1.13) | 0.83 (0.68 to 1.01) |
Maternal education (ref: middle or below) | ||
High school | 0.75 (0.67 to 0.83)*** | 0.90 (0.82 to 1.00) |
College or above | 0.38 (0.33 to 0.45)*** | 0.66 (0.58 to 0.76)*** |
Unknown | 1.14 (1.00 to 1.30)* | 1.18 (0.99 to 1.41) |
Academic performance (ref:excellent) | ||
Middle | 1.55 (1.42 to 1.69)*** | 1.36 (1.25 to 1.48)*** |
Poor | 2.35 (2.12 to 2.60)*** | 2.07 (1.86 to 2.30)*** |
Self-reported health (ref:very good/good) | ||
Fair | 1.39 (1.30 to 1.49)*** | 1.14 (1.07 to 1.22)*** |
Bad/very bad | 1.59 (1.38 to 1.84)*** | 1.31 (1.14 to 1.49)*** |
Unknown | 1.46 (1.07 to 2.00)* | 1.11 (0.78 to 1.57) |
Loneliness (ref:never/occasionally) | ||
Sometimes | 1.30 (1.20 to 1.40)*** | 1.20 (1.09 to 1.32)*** |
Often/always | 1.38 (1.24 to 1.54)*** | 1.20 (1.08 to 1.34)** |
Physical activity (ref: 0 day/week) | ||
1–2 days/week | 0.81 (0.74 to 0.89)*** | 0.90 (0.81 to 0.99)* |
3–5 days/week | 0.74 (0.68 to 0.82)*** | 0.91 (0.83 to 0.99)* |
6–7 days/week | 0.69 (0.61 to 0.79)*** | 0.93 (0.82 to 1.05) |
Breakfast (ref:0 day/week) | ||
1–2 days/week | 1.38 (1.03 to 1.85)* | 1.25 (0.92 to 1.70) |
3–4 days/week | 1.21 (0.97 to 1.51) | 1.04 (0.81 to 1.33) |
≥5 days/week | 0.70 (0.57 to 0.86)** | 0.95 (0.74 to 1.22) |
Fruit (ref:1–2 times/day) | ||
<1 times/day | 2.36 (2.09 to 2.66)*** | 1.44 (1.29 to 1.60)*** |
≥3 times/day | 2.01 (1.65 to 2.44)*** | 1.18 (1.01 to 1.38)* |
Vegetable (ref:1–2 times/day) | ||
<1 time/day | 1.28 (1.13 to 1.45)*** | 0.99 (0.86 to 1.14) |
≥3 times/day | 1.27 (1.16 to 1.39)*** | 0.98 (0.90 to 1.07) |
Carbonated beverages (ref:none) | ||
1–6 times/week | 1.02 (0.95 to 1.09) | 1.02 (0.96 to 1.09) |
1–2 times/day | 0.98 (0.83 to 1.15) | 0.99 (0.84 to 1.18) |
≥3 times/day | 1.50 (1.25 to 1.80)*** | 1.29 (1.03 to 1.60)* |
*P<0.05, **P<0.001, ***P<0.0001.
†Adjusted for all other covariates listed in the table.
AOR, adjusted OR; COR, crude OR.