Table 5.
Factors associated to visual fatigue in the first examination, evaluated with multivariate logistic regression (n = 3054 workers).
| Variables | Odds Ratio | 95% CI | Z Score | p Value |
|---|---|---|---|---|
| Female gender | 1.09 | 0.94–1.28 | 1.18 | 0.239 |
| Age | 0.99 | 0.98–1.00 | −1.52 | 0.128 |
| Seniority of work | 1.00 | 0.99–1.01 | 1.01 | 0.314 |
| VDT working hours | 1.17 | 1.13–1.22 | 8.79 | 0.000 |
| Use of lenses | 1.30 | 1.08–1.58 | 2.71 | 0.007 |
| Presbyopia | 0.87 | 0.67–1.13 | −1.02 | 0.310 |
| Hyperopia | 1.56 | 1.1–2.3 | 2.28 | 0.023 |
| Astigmatism | 1.2 | 0.96–1.4 | 1.57 | 0.117 |
| Environmental factors | 1.10 | 0.99–1.30 | 1.78 | 0.078 |
| Psychosocial factors | 1.03 | 1.00–1.06 | 2.25 | 0.025 |
| I feel anxious sometimes during VDT use | 2.62 | 1.56–4.4 | 3.65 | 0.000 |
| I feel anxious often during VDT use | 4.97 | 1.48–6.84 | 2.59 | 0.010 |
| I feel anxious not in relation with VDT use | 1.40 | 1.07–1.84 | 2.25 | 0.025 |
CI: confidence interval; in bold, significant results.