Research Article
Visual Sequelae of Computer Vision Syndrome: A Cross-Sectional Case-Control Study
Table 5
Multivariate logistic regression analysis of factors affecting the occurrence of blurred vision.
| Variable | Odds ratio (95% confidence interval) | value |
| Age/years | 1.1 (0.99 : 1.3) | 0.06 | Gender | | | Males | 1 | | Females | 1.2 (0.8 : 1.7) | 0.38 | Total daily screen-hours | 1.0 (0.9 : 1.2) | 0.37 | Screen-years | 0.98 (0.88 : 1.1) | 0.63 | Commonest used screen | | | Desktop computer screen | 1 | | Apple smartphone | 2.4 (1.0 : 5.5) | 0.04 | Android smartphone | 2.0 (0.95 : 4.2) | 0.07 | Laptop | 2.1 (0.99 : 4.5) | 0.054 | iPad/tablet/other screens | 0.9 (0.2 : 3.9) | 0.88 | Screen brightness (%) | 1.00 (0.99 : 1.0) | 0.44 | Study medicine using | | | Books | 1 | | Screens/both | 1.6 (0.97 : 2.7) | 0.07 | Main screen-time purpose is | | | Medicine | 1 | | Social | 1.3 (0.8 : 1.9) | 0.30 | Previous DED diagnosis | 2.1 (1.2 : 3.8) | 0.01 | Refractive errors/wearing | 2.0 (1.4 : 2.8) | <0.0001 | Contact lenses wearer | 0.7 (0.3 : 1.6) | 0.41 | Poor lighting conditions | 2.6 (1.7 : 4.1) | <0.0001 | Watch screen in the dark | 1.0 (0.68 : 1.6) | 0.87 | Upper screen edge at/above horizontal eye level | 2.0 (1.3 : 2.9) | 0.001 | Close eye-screen distance | 2.1 (1.5 : 3.0) | <0.0001 | Uncomfortable seating postures | 1.3 (0.7 : 2.3) | 0.38 | Texting with both thumbs | 1.7 (1.2 : 2.5) | 0.004 | Screen-glare | 2.8 (1.2 : 6.5) | 0.02 | Poor screen-resolution or design | 1.9 (0.8 : 4.4) | 0.13 | Small font size | 1.5 (0.97 : 2.3) | 0.07 |
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