Table 2. Associations of physical working conditions with incidence of disability retirement in men from the Kuopio Ischemic Heart Disease Risk Factor Study (adapted from Krause et al [39]).
| Variable | Odds Ratio | 95% CI |
|---|---|---|
| Physical Work | ||
| Light | 1.00 | - |
| Moderately active | 2.14 | 1.09-4.20 |
| Heavy or very heavy | 3.27 | 1.61-6.63 |
| Work in uncomfortable position | ||
| Very little | 1.00 | - |
| Some | 2.12 | 1.03-4.34 |
| Much | 2.64 | 1.38-5.06 |
| Crouching | ||
| None | 1.00 | - |
| Some | 1.78 | 0.94-3.34 |
| Much | 2.45 | 1.08-5.52 |
| Musculoskeletal strain index | ||
| First quartile | 1.00 | - |
| Second quartile | 1.81 | 0.77-4.27 |
| Third quartile | 2.00 | 0.83-4.82 |
| Fourth quartile | 2.96 | 1.29-6.78 |
| Repetitive strain Index | ||
| First tertile | 1.00 | - |
| Second tertile | 1.43 | 0.71-2.87 |
| Third tertile | 2.08 | 1.17-3.70 |
| Back strain | ||
| Little | 1.00 | - |
| Moderate | 1.53 | 0.66-3.53 |
| Much | 2.49 | 1.22-5.07 |
| Neck strain | ||
| Little | 1.00 | - |
| Moderate | 1.08 | 0.47-2.48 |
| Much | 1.86 | 0.95-3.62 |
Risk estimates (which are not mutually adjusted) were adjusted for age in four bands