Univariable and multivariable logistic regression analyses for attitude scores
| Factors | Univariable logistic regression | Multivariable logistic regression | ||
| OR (95% CI) | P value | OR (95% CI) | P value | |
| Knowledge score | 1.333 (1.281 to 1.386) | <0.001 | 1.304 (1.250 to 1.360) | <0.001 |
| Gender | ||||
| Male | Ref | Ref | ||
| Female | 1.408 (1.148 to 1.727) | 0.001 | 1.405 (1.129 to 1.748) | 0.002 |
| Age, years | ||||
| ≤30 | Ref | |||
| 31–35 | 0.899 (0.464 to 1.742) | 0.753 | ||
| 36–40 | 0.962 (0.499 to 1.854) | 0.908 | ||
| ≥41 | 0.721 (0.370 to 1.406) | 0.337 | ||
| Residence | ||||
| Non-urban | Ref | Ref | ||
| City | 1.941 (1.438 to 2.621) | <0.001 | 1.301 (0.937 to 1.807) | 0.116 |
| Education | ||||
| Middle school and below | Ref | Ref | ||
| High school/technical secondary school | 1.842 (1.325 to 2.561) | <0.001 | 1.518 (1.067 to 2.162) | 0.020 |
| Junior college/university | 2.589 (1.917 to 3.494) | <0.001 | 1.428 (1.005 to 2.027) | 0.047 |
| Graduate and above | 4.755 (2.814 to 8.034) | <0.001 | 1.842 (1.032 to 3.290) | 0.039 |
| Occupation | ||||
| Employed | Ref | Ref | ||
| Unemployed | 0.730 (0.486 to 1.098) | 0.131 | 0.899 (0.580 to 1.395) | 0.636 |
| Freelancer | 0.634 (0.504 to 0.798) | <0.001 | 0.885 (0.683 to 1.147) | 0.357 |
| Others (housewives, disabled, retirees or those unwilling to disclose) | 0.605 (0.436 to 0.841) | 0.003 | 0.995 (0.690 to 1.436) | 0.979 |
| Child’s grade | ||||
| 1 | Ref | Ref | ||
| 2 | 0.771 (0.571 to 1.043) | 0.091 | 0.777 (0.566 to 1.066) | 0.118 |
| 3 | 0.755 (0.545 to 1.045) | 0.090 | 0.861 (0.610 to 1.214) | 0.393 |
| 4 | 0.851 (0.626 to 1.157) | 0.303 | 0.792 (0.572 to 1.095) | 0.158 |
| 5 | 0.697 (0.511 to 0.952) | 0.023 | 0.719 (0.515 to 1.005) | 0.053 |
| 6 | 0.644 (0.456 to 0.909) | 0.012 | 0.703 (0.483 to 1.023) | 0.066 |
| Is your child myopic? (ie, does the child have a diagnosis of myopia?) | ||||
| Yes | Ref | Ref | ||
| No | 0.685 (0.506 to 0.928) | 0.015 | 0.824 (0.592 to 1.147) | 0.251 |
| Unclear | 0.516 (0.352 to 0.758) | <0.001 | 0.797 (0.528 to 1.205) | 0.282 |
| Daily electronics usage time | ||||
| ≤2 hours | Ref | |||
| >2 hours | 0.906 (0.747 to 1.099) | 0.318 | ||
| Daily reading and homework time | ||||
| ≤2 hours | Ref | |||
| >2 hours | 0.893 (0.724 to 1.101) | 0.290 | ||
| Is your child taking online courses at home? | ||||
| Yes | 0.978 (0.710 to 1.348) | 0.893 | ||
| No | Ref | |||
| Daily outdoor activities time | ||||
| ≤1 hour | Ref | Ref | ||
| >1 hour | 1.537 (1.229 to 1.922) | <0.001 | 1.468 (1.159 to 1.858) | 0.001 |
| During COVID-19, has the vision of your child worsened (eg, a decrease of visual acuity)? | ||||
| Yes | Ref | |||
| No | 1.069 (0.819 to 1.396) | 0.623 | ||
| Unclear | 0.879 (0.658 to 1.175) | 0.383 | ||