The Functional Assessment of Chronic Illness Therapy - Fatigue (FACIT-Fatigue Subscale): Validity and Reliability of the Iranian Version

Background: The aim of this study was to translate and validate the Functional Assessment of Chronic illnesses Therapy-Fatigue (FACIT-fatigue subscale) in Iran.Methods: The Persian version of the FACIT-fatigue scale was developed using the forward-backward translation method. The questionnaire was then presented to a consecutive sample of breast cancer patients (n = 208) attending the Iranian Center of Breast Cancer (ICBC). The reliability was assessed by internal consistency and test-retest using Cronbach's α and intraclass correlation coefficient (ICC), respectively. Convergent validity was examined by correlation between the FACIT-fatigue scale and the Hospital and Depression Scale (HADS). In addition, discriminant validity was evaluated by the ability of the scale to differentiate between patients who differed in disease stage.Results: The internal consistency of the questionnaire was excellent (Cronbach's α = 0.92). The ICC for the FACIT-fatigue was 0.84. Strong correlations were observed between FACIT-fatigue and depression (r = -0.69) and anxiety (r = -0.72) scores. The FACIT-fatigue discriminated well between subgroups of patients who differed in stage (p
Source: Oncology Research and Treatment - Category: Cancer & Oncology Source Type: research