| Chronic neck pain OR (95% CI) | Chronic shoulder pain OR (95% CI) | |
| Mouse usage, quartiles of | 0.77 (0.55 to 1.07) | 1.11 (0.86 to 1.44) |
| hours per year | ||
| Keyboard usage, quartiles | 1.05 (0.74 to 1.51) | 0.91 (0.68 to 1.21) |
| of hours per year | ||
| Male/female | 1.43 (0.62 to 3.30) | 1.20 (0.55 to 2.58) |
| Seniority | ||
| ⩽3 years (n = 529) | 1.00 (ref ) | 1.00 (ref ) |
| 4–7 years (n = 780) | 1.06 (0.36 to 3.07) | 0.58 (0.24 to 1.41) |
| 8–10 years (n = 442) | 1.88 (0.65 to 5.44) | 0.53 (0.18 to 1.54) |
| >10 years (n = 375) | 2.53 (0.84 to 7.56) | 1.08 (0.43 to 2.69) |
| Age, 10-year increments | 0.85 (0.52 to 1.39) | 0.89 (0.55 to 1.45) |
*OR, odds ratios with 95% confidence intervals obtained from a logistic regression model.