| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations |
The PROMIS PF Upper Extremity CAT has been used in samples with various shoulder disorders, including general shoulder pain, upper extremity trauma (including fractures), rotator cuff disorders, instability, and shoulder arthritis before and after shoulder arthroplasty. |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
r = 0.82 to 0.96 for item reliability (ISI) and r = 0.84 to 0.85 for person reliability (PSI) Item and person separation indices are techniques by which it can be assessed how well a set of items has the ability to differentiate different respondents. They may be interpreted similarly to other more traditional reliability indices in classical test theory (i.e.,Cronbach’s alpha). Values closer to 1 indicate a more internally consistent measure. |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
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| 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 PROMIS item banks were developed following rigorous protocols that involved extensive formative research and statistical analysis. |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description |
Principal component analysis of 1197 adult patients with varying hand and upper extremity complaints (nonshoulder) showed the item bank fit a unidimensional model (Eigen value of 1.96), with 4.2% unexplained variance. There was also no differential item functioning and item fit in the Rasch model was adequate. |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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