| Variable | |
| Weight category | Underweight = 1; normal weight = 2; overweight = 3; obese = 4 |
| PA1 | = 1 if physical activity < 839.99 METs-min/wk; otherwise = 0, reference group |
| PA2 | = 1 if physical activity 840-1559.99 METs-min/wk; otherwise = 0 |
| PA3 | = 1 if physical activity > 1560 METs-min/wk; otherwise = 0 |
| Age | Continuous variable |
| Paternal BMI | Continuous variable |
| Maternal BMI | Continuous variable |
| Tutor class | Went to tutoring class after school = 1; otherwise = 0 |
| Father working | Father working fulltime in the past year = 1; otherwise = 0 |
| Mother working | Mother working fulltime in the past year = 1; otherwise = 0 |
| Sibling | With any number of siblings = 1; otherwise = 0 |
| Living with parents | Living with both parents = 1; otherwise = 0 |
| Income | Monthly household income > 70,000 NT = 1; otherwise = 0 |
| Allowance | With sufficient monthly allowance = 1; otherwise = 0 |
| Active lifestyle | Participating in physical activity as a lifestyle = 1; otherwise = 0 |
| Accompaniment | Participating in physical activity to be with family or friend = 1; otherwise = 0 |
| Fun | Participating in physical activity because it is fun = 1; otherwise = 0 |
| Spend time | Participating in physical activity to spend the free time = 1; otherwise = 0 |