Associated factors of hazardous drinkers among overall participants
| Variables | Crude OR (95% CI) | P value | Adjusted OR (95% CI) | P value |
| Age (+1) | 1.15 (1.13 to 1.18) | <0.001 | 1.14 (1.12 to1.17) | <0.001 |
| Gender (ref. girl) | 1.32 (1.20 to 1.44) | <0.001 | 1.38 (1.23 to 1.52) | <0.001 |
| Residence (ref. urban) | 1.03 (0.94 to 1.13) | 0.535 | 1.04 (0.95 to 1.15) | 0.407 |
| Nuclear family (ref. no) | 0.61 (0.56 to 0.68) | <0.001 | 0.61 (0.55 to 0.67) | <0.001 |
| LBC (ref. yes) | 0.85 (0.77 to 0.94) | <0.001 | 0.90 (0.82 to 1.00) | 0.047 |
| Paternal drinking (ref. yes) | 0.70 (0.62 to 0.79) | <0.001 | 0.82 (0.73 to 0.93) | 0.001 |
| Maternal drinking (ref. yes) | 0.48 (0.43 to 0.52) | <0.001 | 0.51 (0.46 to 0.56) | <0.001 |
Nuclear family, which means that students live with their two biological parents.
LBC, left-behind children; Ref., reference.