Table 5.
Criteria for the Level of Evidence and Overall Assessment of Measurement Properties
| Criteriaa | Overall Assessment | Level of Evidence |
|---|---|---|
| Consistent findings in multiple studies of good methodological quality OR in 1 study of excellent methodological quality | + + + or − − − | Strong |
| Consistent findings in multiple studies of fair methodological quality OR in 1 study of good methodological quality | + + or − − | Moderate |
| 1 study of fair methodological quality | + or − | Limited |
| Conflicting findings from multiple studies | +/− | Conflicting |
| Only studies of poor methodological quality OR only indeterminate results from multiple studies regardless of methodological quality | ? | Unknown |
| Measurement property not assessed | 0 | Not assessed |
a
Adapted from Uijen et al.70