Correlates of high screen time from the multivariate logistic regression model
| Correlates | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | P value*** | |
| Gender | Male | 1.7 (1.2 to 2.3)** | 1.5 (0.9 to 2.2) | 0.053 |
| Family type | Nuclear/single parent | 1.5 (1.1 to 2.1)* | 1.0 (0.6 to 1.6) | 0.974 |
| School type | Private | 2.9 (2.0 to 4.2)** | 2.4 (1.5 to 3.9) | <0.001 |
| Education level | Basic level | 1.6 (1.2 to 2.2)* | 1.0 (0.7 to 1.5) | 0.069 |
| Socioeconomic status | Lower middle | 1.9 (1.3 to 2.8)* | 1.1 (0.6 to 1.8) | 0.764 |
| Upper middle | 1.7 (1.1 to 2.7)* | 0.6 (0.3 to 1.2) | 0.164 | |
| Upper class | 2.2 (0.5 to 9.4) | 1.3 (0.2 to 9.7) | 0.779 | |
| Laptop | Yes | 4.9 (2.8 to 8.4)** | 4.0 (1.9 to 8.1) | <0.001 |
| Tablet | Yes | 3.6 (1.8 to 7.2)** | 1.4 (0.5 to 3.4) | 0.504 |
| Smartphone | Yes | 16.1 (3.8 to 68.7)** | 6.9 (1.5 to 31.3) | 0.013 |
| Television | Yes | 5.1 (3.4 to 7.5)** | 4.2 (2.6 to 6.7) | <0.001 |
| Screen devices used for playing games | Yes | 2.9 (1.7 to 4.9)** | 2.5 (1.3 to 4.9) | 0.008 |
| Screen devices used for YouTube/Facebook/TikTok | Yes | 2.0 (1.3 to 3.1)* | 1.8 (1.0 to 3.2) | 0.037 |
| Perceived eye problem | Yes | 4.0 (2.4 to 6.7)** | 1.1 (0.5 to 2.2) | 0.777 |
| Perceived impair study | Yes | 2.8 (1.9 to 3.9)** | 1.4 (0.9 to 2.3) | 0.140 |
| Perceived loneliness | Yes | 2.6 (1.9 to 3.7)** | 1.7 (1.1 to 2.6) | 0.018 |
| Perceived vision problem | Increased | 6.7 (1.5 to 29.6)* | 7.8 (1.6 to 38.1) | 0.011 |
| Scolding | Yes | 3.4 (2.4 to 4.7)** | 2.8 (1.8 to 4.5) | <0.001 |
| Turned off Wi-Fi | Yes | 5.9 (1.8 to 20.2)* | 3.5 (0.8 to 15.2) | 0.093 |
| Parental control of smartphone applications | Yes | 3.1 (1.0 to 9.5)* | 1.1 (0.3 to 4.2) | 0.915 |
*α<0.05; **α<0.001; ***Bonferroni-corrected α<0.002.