Table 1.
Characteristic of the participants
| Demographic information | N (%) |
|---|---|
| Sex | |
| Female | 5486 (46.02%) |
| Male | 6433 (53.98%) |
| Age (Means and Standard Deviations.) | 15.0 (1.47) |
| Migrant status | |
| Local | 4832 (37.71%) |
| Migrant from other areas of China | 4495 (40.54%) |
| Hukou status | |
| Urban hukou | 6735 (56.50%) |
| Rural hukou | 4399 (36.91%) |
| Living arrangement | |
| Living with parents | 11,206 (94.01%) |
| Living with grandparents | 369 (3.09%) |
| Living with other relatives | 208 (2.90%) |
| Single child or not | |
| Being the single child | 7666 (64.31%) |
| Not being the single child | 4006 (34.4%) |
| Paternal education level | |
| Middle school or lower | 5778 (48.8%) |
| Senior high or vocational school | 3672 (31.0%) |
| Bachelors or higher | 2394(20.2%) |
| Maternal education level | |
| Middle school or lower | 6650 (56.2%) |
| Senior high or vocational school | 3126 (26.4%) |
| Bachelors or higher | 2067 (17.5%) |