The Reliability and Validity of the Turkish Version of the Fibrofatigue Scale

ABSTRACTObjective: To validate translated Turkish version of the Fibrofatigue Scale [FFS].Methods: The Turkish version of FFS was administered to a consecutive sample of 82 patients with fibromyalgia syndrome [FMS; 78 women]; mean age was 37 years and mean symptom duration was 2.3 years. The Turkish version of the Fibromyalgia Impact Questionnaire, the Beck Depression Inventory [BDI], and the Medical Outcome Survey Short Form-36 [SF-36] were documented. Reliability was tested by the test-to-test reliability [intraclass correlation coefficient] and internal consistency [Cronbach's alpha coefficients]. Construct validity was assessed by association with BDI and SF-36 [Spearman's correlation coefficient]. Paired t-test was used to determine the statistical significance of change score [responsiveness].Results: The test–retest reliability and internal consistency of the FFS were excellent with intraclass correlation coefficient of 0.98 [0.97–0.99] and Cronbach's alpha of 0.74. The correlations between the FFS...