Table 4 Levels of evidence for the quality of the measurement property for COSMIN
| Level | Ratinga | Criteria |
|---|---|---|
| Strong | +++ or — | Consistent findings in multiple studies of adequate methodological quality OR in one study of very good methodological quality. |
| Moderate | ++ or – | Consistent findings in multiple studies of doubtful methodological quality OR in one study of adequate methodological quality. |
| Limited | + or - | One study of inadequate methodological quality. |
| Conflicting | +/− | Conflicting findings. |
| Unknown | ? | Only studies of inadequate/doubtful methodological quality. |