Table 2 Scheme of level of evidence for each single study
From: Effects of organisational-level interventions at work on employees’ health: a systematic review
Level | Definition |
|---|---|
High | The study has a randomized controlled design whose quality is greater than the median study quality. |
Medium | The study is either a randomized controlled design whose quality is less than the median study quality, or the study is a quasi-experimental control study whose quality is greater than the median study quality |
Low | The study is either a quasi-experimental control trial whose quality is less than the median study quality, or the study is a quasi-experimental one-group prospective or a cross-sectional one. |