Validation of Turkish version of the Cochin 17-item Scleroderma Functional scale

Abstract

ABSTRACT Introduction The Cochin 17-item Scleroderma Functional (CSF-17) Scale is a patient-reported outcome measure evaluating activities and participation in patients with systemic sclerosis (SSc) Objective The aim of the present study was to translate and cross-culturally adapt the CSF-17 into the Turkish language and investigate its convergent validity and reliability in Turkish-speaking patients with SSc Methods The CSF-17 was cross-culturally adapted according to Beaton’s guideline. Participants completed CSF-17 Scale, Scleroderma Health Assessment Questionnaire (SHAQ), Short Form-12 (SF-12) Health Survey and Hospital Anxiety and Depression Scale (HADS). Internal consistency and test–retest reliability were determined interpreting Cronbach’s alpha and Intraclass Correlation Coefficient (ICC) values, respectively. Convergent validity was tested using Pearson’s correlation coefficient Results Fifty-six patients with SSc were enrolled in the study. Cronbach’s alpha and ICC values of the CSF-17 total score were found to be as 0.963 and 0.958, respectively, indicating excellent reliability. As for the convergent validity, it was determined that CSF-17 total score has a good correlation with SHAQ. Correlations of subscales of CSF-17 with subscales of SF-12 and HADS ranged from poor to moderate Conclusion Turkish version of CSF-17 met the set criteria of reliability and convergent validity. According to the results of the analysis, it was concluded that the Turkish version of the CSF-17 is a reliable and valid tool for Turkish-speaking SSc patients