Table 6.
Factors associated to visual fatigue during 10-year follow-up using the generalized estimating equation (2208 workers that repeated medical examinations 3 times were included in the analysis).
| Variables | Odds Ratio | 95% CI | Z Score | p Value |
|---|---|---|---|---|
| Female gender | 1.05 | 0.90–1.24 | 0.66 | 0.508 |
| Age | 0.98 | 0.97–0.99 | −2.5 | 0.015 |
| Seniority of work | 1.02 | 0.88–1.35 | 0.65 | 0.450 |
| VDT work hours | 1.27 | 1.04–1.53 | 2.50 | 0.035 |
| Use of lenses | 1.34 | 1.09–1.64 | 2.80 | 0.005 |
| Environmental factors | 1.02 | 1.01–1.06 | 2.15 | 0.025 |
| Psychosocial factors | 1.03 | 1.01–1.07 | 2.23 | 0.026 |
| I sometimes feel anxious during VDT use | 2.69 | 1.57–4.61 | 3.60 | 0.000 |
| I often feel anxious during VDT use | 7.40 | 1.77–31.03 | 2.74 | 0.000 |
| I do not feel anxious in relation to VDT use | 1.01 | 0.78–1.30 | 0.13 | 0.944 |
CI: confidence interval; in bold, significant results.