Table 5 Odds ratios (OR) and their 95% confidence interval (Cl) for frequent computer-associated health complaints among 12- to 18-year-old computer users who received ergonomic instructions, adjusted for age, sex and computer use time, by type of instructions.
Ergonomic instructions | Health complaints often | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | Eyes | Neck, shoulders | Head | Hands, fingers, wrists | Lower back | |||||
| Â | n* | OR (95%Cl) | N | OR (95%Cl) | N | OR (95%Cl) | n | OR (95%Cl) | N | OR (95%Cl) |
To arrange desk, chair and screen in the right position | 285 | 0.9 (0.7-1.1) | 206 | 1.3 (1.0-1.7) | 178 | 0.8 (0.7-1.1) | 107 | 1.4 (0.9-2.1) | 82 | 1.2 (0.8-1.9) |
To take rest breaks | 364 | 1.3 (1.0-1.6) | 241 | 1.2 (0.9-1.6) | 228 | 1.2 (0.9-1.6) | 126 | 1.4 (0.9-2.0) | 95 | 1.4 (0.9-2.3) |