Table 1.
Demographic characteristics of the adolescents in East China (n = 6902)
| Characteristics | Junior high school (n = 4208) | Senior high school (n = 2694) | X2 | p |
|---|---|---|---|---|
| Gender | ||||
| Boys | 2029 (48.2) | 1326 (49.2) | 0.661 | 0.416 |
| Girls | 2179 (51.8) | 1368 (50.8) | ||
| Household registration | ||||
| Urban | 1886 (44.8) | 992 (36.8) | 43.205 | < 0.001 |
| Rural | 2322 (55.2) | 1702 (63.2) | ||
| Family structure | ||||
| Intact family | 3516 (83.6) | 2315 (85.9) | 7.076 | 0.008 |
| Non-intact family | 692 (16.4) | 379 (14.1) | ||
| Family size | ||||
| Non-only child | 1997 (47.5) | 1535 (57.0) | 59.592 | < 0.001 |
| Only child | 2211 (52.5) | 1159 (43.0) | ||
| Subjective SES | ||||
| Lower class | 605 (14.4) | 517 (19.2) | 81.416 | < 0.001 |
| Middle class | 2899 (68.9) | 1914 (71.0) | ||
| Upper class | 704 (16.7) | 263 (9.8) | ||
| Paternal education | ||||
| Low | 67 (1.5) | 75 (2.8) | 17.935 | < 0.001 |
| Medium | 2607 (62.0) | 1728 (64.1) | ||
| High | 1534 (36.5) | 891 (33.1) | ||
| Maternal education | ||||
| Low | 243 (5.7) | 205 (7.6) | 18.848 | < 0.001 |
| Medium | 2742 (65.2) | 1812 (67.3) | ||
| High | 1223 (29.1) | 677 (25.1) | ||
| Paternal occupation | ||||
| Low | 68 (1.6) | 46 (1.7) | 3.986 | 0.136 |
| Medium | 2299 (54.6) | 1535 (57.0) | ||
| High | 1841 (43.8) | 1113 (41.3) | ||
| Maternal occupation | ||||
| Low | 612 (14.5) | 359 (13.3) | 20.774 | < 0.001 |
| Medium | 2061 (49.0) | 1470 (54.6) | ||
| High | 1535 (36.5) | 865 (32.1) | ||