From: Prevalence of exercise and non-exercise physical activity in Chinese adolescents
 | Boys (n = 14,274) | Girls (n = 17,731) |  |
---|---|---|---|
 | % | % | *P |
School days | Â | Â | Â |
Age group | Â | Â | Â |
   12 or below | 66.8 | 52.5 | <0.001 |
   13 | 66.4 | 44.9 | <0.001 |
   14 | 65.4 | 41.6 | <0.001 |
   15 | 64.2 | 38.4 | <0.001 |
   16 | 64.1 | 33.6 | <0.001 |
   17 | 59.5 | 28.1 | <0.001 |
   18 or above | 53.0 | 26.1 | <0.001 |
   All | 63.8 | 39.6 | <0.001 |
P for trend | <0.001 | <0.001 | Â |
Holidays | Â | Â | Â |
Age group | Â | Â | Â |
   12 or below | 80.3 | 70.6 | <0.001 |
   13 | 79.4 | 65.1 | <0.001 |
   14 | 79.8 | 61.9 | <0.001 |
   15 | 79.0 | 58.7 | <0.001 |
   16 | 77.9 | 53.8 | <0.001 |
   17 | 76.6 | 49.9 | <0.001 |
   18 or above | 74.6 | 50.3 | <0.001 |
   All | 78.7 | 60.0 | <0.001 |
P for trend | <0.001 | <0.001 | Â |