Validity, and Reliability of the Turkish Version of the Trapeziometacarpal Arthrosis Symptoms and Disability Questionnaire

The TASD questionnaire, the Thumb Disability Examination (TDX) questionnaire, the Visual Analogue Scale (VAS) for pain, as well as hand grip and pinch strength measurements using the Jamar® Hydraulic Hand Dynamometer and Jamar Hydraulic Pinch Gauge Dynamometer were employed to assess thumb function and muscle strength. The questionnaires were administered twice, with a 7-day interval, during which no medical or rehabilitation intervention was made that could alter the clinical condition of the patients.