| Authors | Study population | WAI | Determinant | Measure of association (95% CI) | Adjustments* |
| Aittomaki et al 200312 | 429 municipal workers (M), mean age 49.2 years | WAI <32 | Blue-collar worker | OR 0.95 (0.42 to 2.19) | 1A, E 4C |
| 1398 municipal workers (F), mean age 49.2 years | WAI <32 | Blue-collar worker | OR 1.11 (0.67 to 1.84) | 1A, E 4C | |
| Fischer et al 200614 | 696 care givers, mean age 34.9 years | WAI <37 | Shift work | OR 1.61 (0.89 to 2.91) | 1A, D, E 3A 4C 5A, B |
| Never organised workplace | OR 0.69 (0.32 to 1.51) | 1A, D, E 3A 4C 5A, B | |||
| Often conflict with patients | OR 1.39 (0.82 to 2.35) | 1A, D, E 3A 4C 5A, B | |||
| >2 times verbal abuse (past month) | OR 1.67 (1.00 to 3.04) | 1A, D, E 3A 4C 5A, B | |||
| High-strain job | OR 1.21 (0.70 to 2.10) | 1A, D, E 3A 4C 5A, B | |||
| Often thermal discomfort | OR 1.55 (1.00 to 2.40) | 1A, D, E 3A 4C 5A, B | |||
| Often lifting patients | OR 2.02 (0.96 to 4.25) | 1A, D, E 3A 4C 5A, B | |||
| Pohjonen 2001b20 | 636 home care workers (F), mean age 42.3 years | Decrease WAI classification | High time pressure | OR 1.05 (0.53 to 2.07) | 4A, B, C 5A |
| Poor possibilities to control one’s own work | OR 1.95 (1.02 to 3.72) | 1A, C, E 3B 4A, B, C 5A | |||
| Poor management | OR 1.58 (0.86 to 2.94) | 4A, B, C 5A | |||
| High mental work demands | OR 1.40 (0.79 to 2.48) | None | |||
| Poor ergonomic conditions | OR 2.54 (1.21 to 5.30) | 1A, C, E 3B 4A, B, C 5A | |||
| Pranjic et al 200621 | 534 physicians, mean age 44 years | Decrease WAI classification | Often exposed to mobbing | OR 4.75 (4.14 to 5.35) | 4C |
| Sjogren-Ronka et al 200223 | 88 office workers, mean age 45.7 years | WAI 7–49 | High mental stress | β −0.17 (Sign.) | 2A, B, C 3B |
| Tuomi et al 200125 | 1101 Finnish active workers, mean age 58.4 years | WAI 7–49 | Muscular work | β −0.22 (0.067) | 4A, C 5A, B |
| Poor work postures | β −0.44 (Sign.) | 4A, C 5A, B | |||
| Intelligence demand | β 0.46 (Sign.) | 4A, C 5A, B | |||
| Poor work tools and rooms | β −0.35 (Sign.) | 4A, C 5A, B | |||
| Poor physical climate | β −0.29 (Sign.) | 4A, C 5A, B | |||
| Restless work environment | β −0.33 (Sign.) | 4A, C 5A, B | |||
| Poor management | β −0.54 (Sign.) | 4B, C | |||
| Lack of freedom | β −0.31 (Sign.) | 4B, C | |||
| Uninspiring work | β −0.65 (Sign.) | 4B, C | |||
| Utilisation of work experience | β 0.94 (Sign.) | 4B, C | |||
| Possibilities for development and influence at work | β 0.65 (Sign.) | 4C | |||
| Job retraining | β −3.41 (Sign.) | 4C | |||
| Subjective improvement in work and tasks | β 1.05 (Sign.) | 4A, C 5A, B | |||
| Subjective improvement in work environment and tools | β 0.47 (0.089) | 4A, C 5A, B | |||
| Subjective increase in mental workload | β −1.21 (Sign.) | 4A, C 5A, B |
*For the identification of the covariates, see table 6.
β, linear regression coefficient; F, females; M, males; OR, odds ratio; Sign., p<0.05.