Table 5.
Rating the Quality of Evidence Using the Grading of Recommendations Assessment, Development and Evaluation System
| Level of evidence | Quality rating | Explanation of quality rating |
|---|---|---|
| A | High | High level of confidence in the effects of the intervention. |
| • Several high-quality studies with consistent outcomes | ||
| B | Moderate | Confidence in the effects of the intervention may change with future research findings |
| • Only one high-quality study or | ||
| • Several lower quality studies | ||
| C | Low | Confidence in the effects of the intervention is very likely to change with future research findings |
| • All studies have severe limitations | ||
| D | Very Low | Uncertainty about the effects of the intervention |
| • Only expert opinion and/or | ||
| • No research evidence or | ||
| • Very low-quality evidence |
Source: GRADE.103