Dr. Ferran J. García

The Spanish version of the FibroFatigue Scale: validation of a questionnaire for the observer's assessment of fibromyalgia and chronic fatigue syndrome.
Gen Hosp Psychiatry. 2006 Mar-Apr;28(2):154-60.

Garcia-Campayo J, Pascual A, Alda M, Marzo J, Magallon R, Fortes S.

Department of Psychiatry, Miguel Servet University Hospital and University of Zaragoza Faculty of Medicine, Avenida Isabel La Catolica, s/n 50.009. Zaragoza, Spain.

PMID: 16516066

OBJECTIVE: To examine some of the psychometric properties of the Spanish version of the FibroFatigue Scale (FFS).

METHODS: FFS was administered to 120 patients diagnosed with fibromyalgia and chronic fatigue syndrome. Internal consistency was evaluated by using Cronbach's alpha, test-retest reliability with weighted kappa and construct validity by correlations among FFS, the Fibromyalgia Impact Questionnaire
(FIQ), the EuroQol 5D (EQ-5D) and the Hospital Anxiety and Depression Scale (HADS). The interrater reliability was tested using analysis of variance with patients and raters as independent factors.

RESULTS: Internal consistency (alpha) was .88, test-retest reliability was .91, and interrater reliability was .93. Significant correlations were obtained between overall FFS and the FIQ (.55, P<.01), the EQ-5D (-.48, P<.01) and the HADS depression subscale (.25, P<.01), but not with the HADS anxiety subscale.

CONCLUSION: These results support the reliability and validity of the data obtained with the Spanish version of the FSS.