Table 1 Demographic characteristics of participant
Variables | Boys | % of Sub-Group | Girls | % of Sub-Group | All | % of Sub-Group |
|---|---|---|---|---|---|---|
N | N | N | ||||
Age (years) | ||||||
36–12 | 4724 | 61.5 | 4712 | 62.2 | 9436 | 61.8 |
13–17 | 2961 | 38.5 | 2864 | 37.8 | 5825 | 38.2 |
Region | ||||||
Urban | 1992 | 25.9 | 1995 | 26.3 | 3987 | 26.1 |
Suburban | 2093 | 27.2 | 2071 | 27.3 | 4164 | 27.3 |
Rural | 2566 | 33.4 | 2487 | 32.8 | 5053 | 33.1 |
Poor rural | 1034 | 13.5 | 1023 | 13.5 | 2057 | 13.5 |
Family income | ||||||
Low | 4628 | 60.2 | 4528 | 59.8 | 9156 | 60.0 |
Medium | 1195 | 15.5 | 1153 | 15.2 | 2348 | 15.4 |
High | 360 | 4.7 | 312 | 4.1 | 672 | 4.4 |
Unknown | 1502 | 19.5 | 1583 | 20.9 | 3085 | 20.2 |
Leisure exercise | ||||||
No | 4294 | 55.9 | 4537 | 59.9 | 8831 | 57.9 |
Yes | 3391 | 44.1 | 3039 | 40.1 | 6430 | 42.1 |
Leisure SB | ||||||
≦2 h/d | 2952 | 38.4 | 2928 | 38.6 | 5880 | 38.5 |
> 2 h/d | 4733 | 61.6 | 4648 | 61.4 | 9381 | 61.5 |
BMI status | ||||||
Obesity | 991 | 12.9 | 631 | 8.3 | 1622 | 10.6 |
Overweight | 1140 | 14.8 | 875 | 11.5 | 2015 | 13.2 |
Normal | 5024 | 65.4 | 5668 | 74.8 | 10,692 | 70.1 |
Underweight | 530 | 6.9 | 402 | 5.3 | 932 | 6.1 |