Cross-cultural adaptation, validity, and reliability of the Turkish version of the trapeziometacarpal arthrosis symptoms and disability questionnaire

Background The Trapeziometacarpal Arthrosis Symptoms and Disability questionnaire (TASD) is widely used to assess symptoms and disability associated with trapeziometacarpal (TMC) arthrosis. Objective To adapt the TASD into Turkish (TASD-TR) and evaluate its reliability and validity. Methods Forty-one patients with TMC arthrosis were included in the study. Thumb function was assessed using the TASD-TR and the Thumb Disability Examination (TDX). Pain intensity was rated using the Visual Analogue Scale (VAS). Power grip strength (PGS) and pinch strength (PS) were measured using the Jamar Hydraulic Hand Dynamometer and Jamar Pinch Gauge, respectively. Results The TASD-TR demonstrated good test-retest reliability and internal consistency (Cronbach's alpha = 0.786–0.859; Intraclass Correlation Coefficient (ICC) = 0.844). TASD-TR Total score showed a high correlation with TDX Total score (r = 0.706) but weak correlations with PGS (r = −0.342), PS (r = −0.290), and VAS (r = 0.373) scores. The TASD-TR Disability subscale was highly correlated with both TDX Total (r = 0.882) and TDX-ADL (r = 0.877) scores, and the TASD-TR Symptoms subscale was moderately correlated with TDX Pain score (r = 0.508). Conclusion The TASD-TR is a reliable and valid tool for assessing thumb symptoms and function in Turkish-speaking patients with TMC arthrosis.