Rachel Batteson, Alison Hammond, Frank Burke , Shiladitya Sinha
The aim of this study was to provide evidence for the content and construct validity and test-retest and inter-rater reliability of the DQST. The DQST diagnostic criteria were initially generated from a literature review and content validity was established. The DQST was then tested in people either already diagnosed with, or reported as having some of the symptoms of, de Quervain's disease. Construct validity was tested with people with CTS or OA of the CMC joint. Inter-rater reliability was excellent, test retest reliability was good and sensitivity and specificity testing demonstrated that the DQST discriminated between people with de Quervain's disease, CTS or OA of the CMC joint.
The DQST is a valid, reliable tool which could be of assistance in aiding correct diagnosis for recruitment to clinical trials and in clinical practice.
Musculoskeletal Care, 10 July 2008, online article ahead of print