Unadjusted and adjusted incidence rate ratios for neck pain among male and female computer users
| Risk factor | Men | Women | Total* | Total*, adjusted |
|---|---|---|---|---|
| IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | |
| IRR, incidence rate ratio. | ||||
| *Stratified for sex. | ||||
| †Adjusted for physical exposure, job strain, and age. | ||||
| ‡Adjusted for perceived muscular tension, physical exposure, and age. | ||||
| §Adjusted for muscular tension, job strain, and age. | ||||
| ¶Adjusted for muscular tension, job strain, and physical exposure. | ||||
| Muscular tension | ||||
| Low | 1 | 1 | 1 | 1 |
| Medium | 1.2 (0.66 to 2.08) | 1.7 (0.95 to 2.91) | 1.4 (0.95 to 2.10) | 1.3 (0.85 to 1.91)† |
| High | 1.9 (1.05 to 3.48) | 1.9 (1.05 to 3.49) | 1.9 (1.25 to 2.93) | 1.6 (1.02 to 2.48)† |
| Job strain | ||||
| Low | 1 | 1 | 1 | 1 |
| Medium | 1.6 (0.93 to 2.69) | 1.4 (0.77 to 2.40) | 1.5 (1.00 to 2.18) | 1.5 (1.02 to 2.32)‡ |
| High | 1.5 (0.74 to 3.09) | 1.7 (0.95 to 3.24) | 1.6 (1.03 to 2.61) | 1.5 (0.95 to 2.52)‡ |
| Physical exposure | ||||
| Low | 1 | 1 | 1 | 1 |
| Medium | 1.2 (0.73 to 2.12) | 1.6 (0.99 to 2.45) | 1.4 (1.01 to 1.99) | 1.4 (0.99 to 2.01)§ |
| High | 1.5 (0.79 to 2.96) | 1.4 (0.83 to 2.42) | 1.5 (0.97 to 2.22) | 1.3 (0.85 to 2.03)§ |
| Age | ||||
| Young (18–34) | 1 | 1 | 1 | 1 |
| Middle (35–44) | 1.3 (0.74 to 2.28) | 1.6 (0.80 to 3.03) | 1.4 (0.92 to 2.15) | 1.4 (0.90 to 2.21)¶ |
| Old (⩾45) | 0.8 (0.45 to 1.36) | 1.5 (0.85 to 2.71) | 1.1 (0.74 to 1.61) | 1.2 (0.79 to 1.81)¶ |