Table 1 Sample Characteristics
Characteristics | Boys(n = 1525) | Girls (n = 2019) | Total (n = 3544) | t or χ2 |
|---|---|---|---|---|
Age (years) | Â | Â | Â | Â |
|  | 15.6 ± 0.6 | 15.6 ± 0.8 | 15.6 ± 0.7 | -1.39 |
Weight Status1 | Â | Â | Â | Â |
   Underweight | 5.1% | 5.8% | 5.5% | 142.91*** |
   Normal weight | 72.5% | 85.8% | 82.8% |  |
   Overweight | 14.8% | 6.2% | 10.5% |  |
   Obese | 7.5% | 2.1% | 4.8% |  |
Perceived body weight | Â | Â | Â | Â |
   Underweight | 28.1% | 16.9% | 21.7% | 85.47*** |
   Normal weight | 45.8% | 46.6% | 46.3% |  |
   Overweight | 21.6% | 32.1% | 27.6% |  |
   Obese | 3.8% | 4.0% | 3.9% |  |
Father's Educational Level2 | Â | Â | Â | Â |
   Low | 24.7% | 28.5% | 26.8% | 19.94*** |
   Middle | 53.9% | 55.7% | 31.6% |  |
   High | 21.4% | 15.8% | 18.2% |  |
Mother's Educational Level2 | Â | Â | Â | Â |
   Low | 30.4% | 34.3% | 32.6% | 24.12*** |
   Middle | 53.5% | 55.1% | 54.4% |  |
   High | 16.0% | 10.6% | 12.9% |  |
Family's Income3 | Â | Â | Â | Â |
   Low | 21.7% | 29.1% | 25.9% | 50.12*** |
   Middle | 51.9% | 53.2% | 52.7% |  |
   High | 26.4% | 17.6% | 21.4% |  |
Father employment status4 | Â | Â | Â | Â |
   Yes | 78.3% | 61.1% | 69.7% | 0.11 |
   No | 21.7% | 38.9% | 30.3% |  |
Mother employment status4 | Â | Â | Â | Â |
   Yes | 68.3% | 64.1% | 66.2% | 6.87** |
   No | 31.7% | 35.9% | 33.8% |  |