Bivariate and multivariate prevalence ratios (PRs (95% CIs)) for the risk of having a neck-shoulder disorder at baseline
| Subjects (n) | Risk of having a shoulder disorder | |||||
|---|---|---|---|---|---|---|
| Bivariate | Multivariate4-150 | |||||
| PR | 95% CI | PR | 95% CI | |||
| Duration of exposure (y): | ||||||
| ⩽2 | 34 | 2.50 | 0.81 to 7.75 | 2.44 | 0.72 to 8.23 | |
| 2–10 | 83 | 1.00 | 1.00 | |||
| 10–20 | 67 | 1.79 | 0.64 to 5.03 | 1.80 | 0.62 to 5.26 | |
| >20 | 59 | 4.29 | 1.71 to 10.75 | 4.44 | 1.54 to 12.78 | |
| Age (y): | ||||||
| ⩽40 | 141 | 1.00 | 1.00 | |||
| >40 | 102 | 1.66 | 0.89 to 3.09 | 0.86 | 0.37 to 2.03 | |
| Smoking: | ||||||
| No | 126 | 1.00 | 1.00 | |||
| Yes | 112 | 1.55 | 0.83 to 2.90 | 1.62 | 0.83 to 3.13 | |
| Body mass index: | ||||||
| <20 | 37 | 0.86 | 0.35 to 2.13 | 0.72 | 0.26 to 1.83 | |
| 20–25 | 117 | 1.00 | 1.00 | |||
| >25 | 85 | 0.74 | 0.37 to 1.50 | 0.71 | 0.34 to 1.47 | |
| Living alone with children: | ||||||
| No | 227 | 1.00 | 1.00 | |||
| Yes | 16 | 1.78 | 0.63 to 4.99 | 1.35 | 0.37 to 4.95 | |
| Job strain: | ||||||
| Low | 144 | 1.00 | 1.00 | |||
| High | 95 | 1.11 | 0.59 to 2.08 | 0.88 | 0.45 to 1.71 | |
| Social support: | ||||||
| High | 155 | 1.00 | 1.00 | |||
| Low | 83 | 1.59 | 0.85 to 2.98 | 1.66 | 0.86 to 3.23 | |
| Stress: | ||||||
| Low | 155 | 1.00 | 1.00 | |||
| High | 83 | 2.89 | 1.53 to 5.44 | 2.54 | 1.28 to 5.05 | |
↵4-150 Multivariate=all independent variables from this column are entered into the Cox's proportional hazards model.