Table 8.
Final multivariate linear regression analysis of factors affecting the total number of symptoms.
| Variable | Regression coefficient (95% confidence interval) | P value |
|---|---|---|
| Gender | ||
| Males | 1 | |
| Females | 0.6 (0.3 : 0.9) | <0.0001 |
| Total daily screen-hours | 0.2 (0.1 : 0.3) | <0.0001 |
| Screen size | ||
| Large | 1 | |
| Medium/small | 0.3 (0.05 : 0.6) | 0.02 |
| Previous DED diagnosis | 1.1 (0.:1.5) | <0.0001 |
| Refractive errors/wearing | 0.7 (0.4 : 1.0) | <0.0001 |
| Poor lighting conditions | 1.3 (1.0 : 1.7) | <0.0001 |
| Upper screen edge at/above horizontal eye level | 1.5 (1.2 : 1.8) | <0.0001 |
| Close eye-screen distance | 1.3 (1.00 : 1.6) | <0.0001 |
| Uncomfortable seating postures | 1.3 (0.8 : 1.7) | <0.0001 |
| Texting with both thumbs | 1.8 (1.4 : 2.1) | <0.0001 |
| Screen-glare | 1.4 (0.8 : 2.0) | <0.0001 |
| Poor screen-resolution or design | 1.4 (0.9 : 2.0) | <0.0001 |
| Small font size | 0.8 (0.4 : 1.1) | <0.0001 |