| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Two articles, with a total of 3 study populations, assessed internal consistency, with standardized Cronbach α of 0.91, 0.88, and 0.81. |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Some reliability studies have been performed regarding specific items of the PMR-AS, but not for all components and not for the PMR-AS as a whole. |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
The PMR-AS was based on the core set of parameters of the PMR response criteria, and taking the SDAI as a model; the patient cohorts who were evaluated for the development of the PMR response criteria was tested to assess instrument validity. |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
Five out of 7 hypotheses concerning construct validity could be tested, from which 3 (60%) were confirmed with relatively limited sample sizes and adequate overall methodological quality. These confirmed hypotheses included the association between the PMR-AS andphysical function, QOL, and clinical disease state. |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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