Table 1. Demographic and behavioral characteristics of the total sample, 2015 (N = 2805).
| Variable | N (%) | Variable | N (%) |
|---|---|---|---|
| Sex | Mother’s education | ||
| Boys | 1328(47.3) | Below high school | 2460(87.7) |
| Girls | 1477(52.7) | High school diploma | 321(11.4) |
| Grade | Beyond high school | 24(0.9) | |
| 7th | 578(20.6) | Parental relationship | |
| 10th | 2227(79.4) | Good | 2146(76.5) |
| Left-behind children | Somewhat poor | 473(16.9) | |
| Yes | 1596(56.9) | Poor | 186(6.6) |
| No | 1209(43.1) | Academic performance | |
| Only child | Good | 76(2.7) | |
| Yes | 689(24.6) | Moderate | 2367(84.4) |
| No | 2116(75.4) | Poor | 362(12.9) |
| Race/ethnicity | Health risk behaviors | ||
| Han | 2785(99.3) | Unhealthy diet | 449(16.0) |
| Others | 20(0.7) | Physical inactivity | 1717(61.2) |
| Monthly allowance | Unhealthy Internet use | 977(34.8) | |
| Low (≤ 300 RMB) | 299(10.7) | Accidental injury | 1320(47.1) |
| Medium (300–700 RMB) | 1690(60.2) | Tobacco use | 194(6.9) |
| High (≥700 RMB) | 816(29.1) | Binge-drinking | 327(11.7) |
| Father’s education | Self-injurious behavior | 493(17.6) | |
| Below high school | 2361(84.2) | Suicide risk | 590(21.0) |
| High school diploma | 407(14.5) | ||
| Beyond high school | 37(1.3) |