Table 1.
Characteristics of study subjects of urban or rural junior middle school
| Variables | Total (N = 3605) |
Rural (N = 1731) |
Urban (N = 1874) |
P |
|---|---|---|---|---|
| Age, years (Median, IQR) | 13 (13~14) | 13 (12~13) | 14 (13~14) | 0.00 |
| Females, n (%) | 1560 (43.27) | 657 (37.95) | 903 (48.19) | 0.00 |
| Depression, n (%) | 1220 (33.84) | 562 (32.47) | 658 (35.11) | 0.094 |
| Accommodation, n (%) | 0.00 | |||
| At home | 2393 (66.38) | 580 (33.50) | 1813 (96.74) | |
| In residence | 735 (20.39) | 709 (40.96) | 26 (1.39) | |
| Others | 477 (13.23) | 442 (25.53) | 35 (1.87) | |
| Academic achievement, n (%) | 0.00 | |||
| Excellent | 567 (15.73) | 171 (9.88) | 396 (21.13) | |
| Average | 1322 (36.67) | 627 (36.22) | 695 (37.09) | |
| Poor | 1716 (47.60) | 933 (53.90) | 783 (41.78) | |
| Key class, n (%) | 1547 (42.91) | 476 (27.50) | 1071 (57.15) | 0.00 |
| Three-generational household, n (%) | 847 (23.50) | 342 (19.76) | 505 (26.95) | 0.00 |
| Only children, n (%) | 2208 (61.25) | 260 (15.02) | 1137 (60.67) | 0.00 |
| Left behind children, n (%) | 1041 (28.88) | 887 (51.24) | 154 (8.22) | 0.00 |
| Single parent family, n (%) | 210 (5.83) | 90 (5.20) | 120 (6.4) | 0.123 |
| Full-time mother, n (%) | 579 (16.06) | 316 (18.26) | 263 (14.03) | 0.001 |
| Father’s education level, n (%) | 0.00 | |||
| Primary school or below | 479 (13.29) | 352 (20.34) | 127 (6.78) | |
| Secondary school | 2075 (57.56) | 1257 (72.62) | 818 (43.65) | |
| College degree or above | 1051 (29.15) | 122 (7.04) | 929 (49.57) | |
| Mother’s education level, n (%) | 0.00 | |||
| Primary school or below | 810 (22.47) | 667 (38.53) | 143 (7.63) | |
| Secondary school | 1863 (51.68) | 979 (56.56) | 884 (47.17) | |
| College degree or above | 932 (25.85) | 85 (4.91) | 847 (45.20) | |
| Exercise habit, n (%) | 1735 (48.13) | 666 (38.47) | 1069 (57.04) | 0.00 |