Table 2.
Demographic characteristics of the sample (%)
| Variables | Total | Boys | Girls | P |
|---|---|---|---|---|
| N = 1700 | N = 865 | N = 835 | ||
| Age (M [SD])Grade | 12.46[0.96] | 12.51[0.98] | 12.40[0.93] | 0.013 |
| 6 | 34.06 | 33.41 | 34.73 | |
| 7 | 37.24 | 36.42 | 38.08 | 0.395 |
| 8 | 28.71 | 30.17 | 27.19 | |
| Has siblings | ||||
| Yes | 35.41 | 36.98 | 33.89 | 0.198 |
| No | 64.59 | 63.12 | 64.59 | |
| Locally registered resident | ||||
| Yes | 79.29 | 77.80 | 80.84 | 0.298 |
| No | 20.71 | 22.20 | 19.16 | |
| Rents a house | ||||
| Yes | 18.35 | 20.12 | 16.53 | 0.056 |
| No | 81.65 | 79.88 | 83.47 | |
| Highest parental education | ||||
| Junior high school and below | 10.76 | 12.49 | 8.98 | |
| High/technical school | 26.53 | 25.78 | 27.31 | |
| College/university | 50.41 | 49.13 | 51.74 | 0.115 |
| Unknown | 12.29 | 12.60 | 11.98 | |
| Parental divorce | ||||
| Yes | 11.47 | 10.06 | 12.93 | 0.063 |
| No | 88.53 | 89.94 | 88.53 | |
Abbreviation: M [SD] mean [standard deviation]