Criteria for occupational health intervention studies
| Intervention studies | Any kind of active manipulation of the environment, behaviour, or disease |
|---|---|
| A1 | RCT or cluster RCT |
| A2 | Controlled trial: before/after measurement with concurrent control group |
| A3 | Time series: three outcome measurements before and three after the intervention |
| A4 | Before/after comparison without control group |
| A5 | Quality of care studies, comparison of outcome among different levels of intervention, comparison with arbitrary controls |
| Occupational health studies | Intervention aimed to improve workers’ health |
| B1 | Intervention to remove/eliminate adverse exposure |
| B2 | Intervention to influence healthy and safe behaviour of workers |
| B3 | Intervention to influence occupational disease or work related symptoms or signs |
| B4 | Intervention to prevent occupational disability, maintain working ability, reduce sickness absence, increase return to work |
| B5 | Intervention to reduce injuries and occupational accidents |
| B6 | Intervention to increase the quality of occupational health services or the quality of occupational health professionals |