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%) |