Table 1.
Sample characteristicsa,b
| Variable | Boys | Girls | All |
|---|---|---|---|
| (n = 1754) | (n = 1567) | (n = 3321) | |
| Age (years) | 15.02 (0.05) | 15.03 (0.06) | 15.02 (0.04) |
| Body mass index (BMI) | 21.27 (0.10) | 20.67 (0.11) | 20.99 (0.08) |
| Household income quartile | |||
| Lowest | 11.01 | 12.64 | 11.76 |
| Middle-low | 25.23 | 27.35 | 26.21 |
| Middle-high | 32.00 | 30.67 | 31.38 |
| Highest | 31.76 | 29.34 | 30.64 |
| Residence | |||
| Urban area | 83.16 | 82.54 | 82.87 |
| Rural area | 16.84 | 17.46 | 17.13 |
| Maternal weight status | |||
| Underweight | 3.62 | 3.68 | 3.65 |
| Normal weight | 71.36 | 70.62 | 71.02 |
| Obese | 25.02 | 25.70 | 25.34 |
| Maternal educational level | |||
| ≤ Middle school | 16.71 | 16.44 | 16.59 |
| High school | 57.42 | 56.44 | 56.96 |
| ≥ College | 25.87 | 27.13 | 26.45 |
| Weight control practice | |||
| Lose weight | 25.71 | 47.65 | 35.90 |
| Stay the same weight | 13.16 | 16.05 | 14.50 |
| Gain weight | 18.08 | 2.95 | 11.05 |
| Do nothing | 43.04 | 33.35 | 38.54 |
| Moderate exercise | |||
| Never | 43.70 | 61.18 | 51.83 |
| 1-2 days/week | 28.40 | 25.21 | 26.92 |
| ≥3 days/week | 27.90 | 13.60 | 21.26 |
| Feeling under stress | |||
| Very little | 16.22 | 13.03 | 14.74 |
| Little | 59.09 | 54.23 | 56.83 |
| Much | 21.28 | 27.56 | 24.20 |
| Very much | 3.40 | 5.18 | 4.23 |
| Smoking experience | |||
| Yes | 23.52 | 10.51 | 17.48 |
| No | 76.48 | 89.49 | 82.52 |
| Drinking experience | |||
| Yes | 41.24 | 34.73 | 38.22 |
| No | 58.76 | 65.27 | 61.78 |
aFor categorical variables, cell percentage (%) was a weighted percentage using survey sample weights
bFor continuous variables, mean and standard error of means were provided