| MEASUREMENT PROPERTIES | |
| Limitations | English only |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Not Tested |
| Cronbach's (Describe) | |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
For RA-BEAM and RA-BUILD, the ICCs for weekly mean Duration of MJS and Severity of MJS ranged from 0.88 to 0.91 from Week 1 to 2 (RA-BEAM n = 412; RA-BUILD n = 185) and from 0.90 to 0.93 from Week 4 to Week 8 (RA-BEAM n = 417; RA-BUILD n = 215). |
| 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 content validity was supported through a targeted literature review, interviews with health-care providers, and qualitative concept elicitation and cognitive debriefing interviews with patients with RA. These interviews confirmed the relevance of duration and severity of MJS as symptoms of RA, as well as the appropriateness of terminology used to assess these symptoms. |
| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description | |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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