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

ABSTRACT

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.