The relationship between different digital media experiences and different OSDI levels (divided into asymptomatic, mild, moderate and severe symptomatic group)
| Variable | P value | OR | 95% CI |
| Time of watching TV (hour/day) | |||
| ≤1 | Ref | Ref | NA |
| >1 | 0.986 | 0.996 | 0.671 to 1.479 |
| Time of using smartphone (hour/day) | |||
| ≤1 | Ref | Ref | NA |
| >1 | 0.001 | 2.355 | 1.440 to 3.853 |
| Time of using tablet (hour/day) | |||
| ≤1 | Ref | Ref | NA |
| >1 | 0.045 | 1.786 | 1.014 to 3.145 |
| Time of using computer (hour/day) | |||
| ≤1 | Ref | Ref | NA |
| >1 | 0.417 | 1.507 | 0.560 to 4.050 |
The dependent variable is different OSDI levels (divided into asymptomatic, mild, moderate and severe symptomatic group).
NA, not applicable; OSDI, Ocular Surface Disease Index.