The reliability and validity of the Turkish version of the Fibromyalgia Participation Questionnaire

Abstract

Objective: The objective of this study was to test the reliability and validity of the Turkish version of theFibromyalgia Participation Questionnaire (FPQ).Methods: One hundred and eighty-four female patients with fibromyalgia syndrome were includedin the study. All patients filled out the Turkish FPQ (FPQ-T) questionnaire, which was obtained bytranslation from German according to the guideline for the process of cross-cultural adaptation Thepatients filled out the revised Fibromyalgia Impact Questionnaire (FIQ) and reevaluated the FPQ-Ttwo hours later. Internal consistency reliability of the FPQ-T was assessed by calculating the “if itemdeleted” using Cronbach’s alpha and the “item-total correction” coefficient for each item of the ques-tionnaire. The consistency of the subscales and the correlation of the test-retest values were assessed.The test-retest values were compared using the Wilcoxon test. Criterion validity was measured usingFIQ scales by Spearman’s rank correlation coefficient.Results: For internal reliability, Cronbach’s alpha coefficient was calculated as 0.957 for nonworkingpatients and 0.958 for working patients. Cronbach’s alpha values of 0.939, 0.871, and 0.914 were ob-tained for daily, social, and work life, respectively. Correlation coefficients were 0.888 for daily life, 0.859for social life, and 0.901 overall in the nonworking group versus 0.896 the in working group. The com-parison of scores obtained from test-retest measurements showed no significant difference exceptfor Item 3. The correlation of the symptom severity score (SSS) and the FPQ-T was r=0.385 (p