Turkish Translation, Cultural Adaptation, Reliability, and Validity of the Exercise-Induced Leg Pain Questionnaire

Abstract

CONTEXT: Exercise-induced leg pain (EILP) is a chronic condition that generally arises in elite and recreational athletes' lower quarter of the legs. OBJECTIVES: The study aimed to translate and culturally adapt the EILP questionnaire into Turkish (T-EILP) and evaluate its reliability and validity. DESIGN: A cross-sectional study. METHODS: Established guidelines were preferred for translation and adaptation. T-EILP was filled twice with a 1-week interval. In the first assessment, patients were also evaluated with Short Form-36 and Visual Analog Scale, both for preexercise and postexercise. Test-retest reliability and internal consistency of the T-EILP were measured with the intraclass correlation coefficient and Cronbach α coefficient, respectively. The construct validity was demonstrated with the Pearson correlation coefficient (r). Further, the minimum detectable change and standard error of measurement with 95% confidence were calculated. RESULTS: A total of 121 participants (23.0 [3.59] y) were included in the study. The test-retest reliability was excellent and internal consistency was acceptable (intraclass correlation coefficient = .821, α = .808). T-EILP was highly correlated with the physical function subscore of the Short Form-36 (r = .509, P < .01). There was a moderate correlation between T-EILP with the bodily pain subscore of the Short Form-36 and Visual Analog Scale (postexercise; r1 = .436, r2 = -.355, P < .01). The standard error of measurement and minimum detectable change with 95% confidence were 3.54 and 9.81, respectively. CONCLUSION: T-EILP is a reliable and valid tool in Turkish-speaking participants. The minimum detectable change with 95% confidence of the T-EILP provides an essential reference for monitoring EILP