Table 2.
Daily time spent in moderate to vigorous physical activity among junior high school students of Ho Chi Minh City in 2007
| Median (minutes per day)  | 
Inter-quartile range (25%, 75%)  | 
p-values* | |
|---|---|---|---|
| Total | 52.0 | 32.4, 78.8 | |
| Gender | < 0.001 | ||
| Male | 58.3 | 37.9, 84.9 | |
| Female | 47.0 | 31.6, 69.2 | |
| Age group | 0.500 | ||
| 12-13 | 51.3 | 32.0, 75,8 | |
| 14-15 | 53.8 | 34.2, 83.2 | |
| Overweight/obese** | 0.003 | ||
| yes | 35.2 | 26.0, 66.7 | |
| no | 54.2 | 35.5, 81.2 | |
| Metabolic syndrome | |||
| Yes | 38.8 | 25.6, 46.9 | 0.001 | 
| No | 53.7 | 33.2, 79.8 | 
* p-values of Mann-Whitney rank sum test to compare median of 2 groups.
** Combined overweight and obese using IOTF cut-off values