Reliability and Validity of the Cross-Culturally Adapted Thai Version of the Tampa Scale for Kinesiophobia in Knee Osteoarthritis Patients.

PURPOSE The aim of this study was to develop a cross-culturally adapted Thai version of the Tampa Scale for Kinesiophobia (TSK) and investigate its reliability and validity among patients with knee osteoarthritis. METHODS The TSK was translated into Thai language and culturally adapted in line with the international standards. The Thai TSK questionnaire was then tested for internal consistency, test-retest reliability, and convergent validity by comparing it with the visual analogue scale, Western Ontario and McMaster Universities Osteoarthritis Index, State-Trait Anxiety Inventory, and Timed Up and Go Test. RESULTS Eighty patients with knee osteoarthritis were included in the study. The Thai version of the TSK was easily comprehended and completed within 6 minutes. The questionnaire showed a good internal consistency (α = 0.90) and high test-retest reliability {ICC (2,1) = 0.934}. Convergent validity showed high correlations with the visual analogue scale, Western Ontario and McMaster Universities Osteoarthritis Index, and State-Trait Anxiety Inventory (r = 0.741, 0.856, and 0.817, respectively). However, there was no significant correlation between the Thai version of the TSK scores and the Timed Up and Go Test results. CONCLUSION The Thai version of the TSK has satisfactory reliability and validity for the evaluation of pain-related fear of movement/(re)injury in patients with knee osteoarthritis.