| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations |
Translated versions can be found on the official website: http://dash.iwh.on.ca/translations. Researchers and commercial organisations wishing to use the translated measure should contact the developers. |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
The Cronbach’s alpha were high (0.92 and 0.94) |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Test–retest reliability was evaluated in four studies (from 5 publications): one excellent, one fair and two poor quality ratings. Intraclass correlation coefficients (ICC) ranged from 0.90 to 0.94 and thus met the cut-point for a positive rating (C>.70) and for use in individual patients. |
| C. Reliability interobserver or Measurement error | Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
MDC90: 11.0–17.2 |
| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
|
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description |
Summary of the validation study that used the QuickDASH in prospective data collection: 1 factor model High interitem correlation (Cronbach’s alpha 0.92) but factor loadings and variance not reported 2 factor model Factor 1 (function): 59 % variance, eigenvalue 6.5 Factor 2 (symptoms): 14 % variance, eigenvalue 1.55. Later the authors chose to leave the two factor model and return to a single summative score combining Factor 1 (n = 7 items) and 2 items from Factor 2 (n = 2), with a Cronbach’s alpha of 0.925 and factor analysis findings suggesting one factor. The other two items (pins and needles, sleep) from Factor 2 were dropped based on focus group work. |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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