Table 4.
Visual fatigue, visual acuity and refractive disorders in the first and in the last control evaluated with univariate logistic regression. Data are reported as odds ratios (OR) and 95% confidence intervals (CI).
| Variables | 1st Examination | Last Examination | ||||
|---|---|---|---|---|---|---|
| OR | 95% CI | p | OR | 95% CI | p | |
| Sex female | 1.3 | 1.1–1.56 | 0.005 | 0.98 | 0.81–1.17 | 0.814 |
| Age | 0.98 | 0.98–0.99 | 0.031 | 0.98 | 0.97–0.99 | 0.001 |
| Seniority of work | 1.00 | 0.99-1.01 | 0.753 | 0.98 | 0.97–0.99 | 0.022 |
| VDT working hours | 1.19 | 1.14–1.24 | 0.000 | 1.17 | 1.11–1.23 | 0.000 |
| Use of lenses | 1.42 | 1.1–1.85 | 0.011 | 1.28 | 0.99–1.64 | 0.055 |
| Presbyopia | 0.82 | 068–0.98 | 0.033 | 0.89 | 0.74–1.05 | 0.186 |
| Hyperopia | 1.52 | 1.1–2.2 | 0.020 | 0.98 | 0.75–1.30 | 0.889 |
| Astigmatism | 1.30 | 1.05–1.52 | 0.012 | 1.05 | 0.88–1.25 | 0.582 |
| Myopia | 1.09 | 0.91–1.31 | 0.301 | 0.93 | 0.78–1.10 | 0.415 |
| Visual acuity OO near | 1.02 | 0.98–1.07 | 0.431 | 1.01 | 0.96–1.01 | 0.628 |
| Visual acuity OO intermediate |
1.06 | 0.96–1.17 | 0.213 | 1.02 | 0.98–1.12 | 0.137 |
| Visual acuity OO far | 1.02 | 0.92–1.13 | 0.734 | 1.10 | 0.98–1.24 | 0.112 |
VDT: video display operators; OO: both eyes; In bold, significant results.