Table 1.
Sociodemographic and VDT exposure characteristics of the sample (n = 109).
| Variables | n | % |
|---|---|---|
| Age (years) | ||
| 46–50 | 26 | 23.9 |
| 51–52 | 22 | 20.2 |
| 53–55 | 30 | 27.5 |
| 56–69 | 31 | 28.4 |
| Sex | ||
| Male | 62 | 56.9 |
| Female | 47 | 43.1 |
| Job category | ||
| TRS | 47 | 43.1 |
| AS | 62 | 56.9 |
| Use of VDT at work (hours/day) | ||
| ≤6 | 53 | 48.6 |
| >6 | 56 | 51.4 |
| Use of VDT at work (years) | ||
| ≤20 | 37 | 33.9 |
| 21–29 | 50 | 45.9 |
| ≥30 | 22 | 20.2 |
| Continuous work time at VDT (minutes) | ||
| ≤60 | 51 | 46.8 |
| 61–120 | 44 | 40.4 |
| >120 | 14 | 12.8 |
| Scheduled breaks during VDT work | ||
| No | 101 | 92.7 |
| Yes | 8 | 7.3 |
| Total use of VDT (hours/day) | ||
| ≤8 | 49 | 45.0 |
| >8 | 60 | 55.0 |
| Screen technology | ||
| LED backlight | 46 | 42.2 |
| LED | 14 | 12.8 |
| LCD | 5 | 4.6 |
| TFT | 42 | 38.5 |
| LCD-TN | 2 | 1.8 |
Abbreviations: VDT: video display terminal; TRS: Teaching and Research Staff; AS: Administrative Staff; LED: Light Emitting Diode; LCD: Liquid Cristal Display; TFT: Thin Film Transistor; TN: Twisted Nematic. The categories of the variables are in Italic type.