期刊
JOURNAL OF RHEUMATOLOGY
卷 38, 期 4, 页码 672-679出版社
J RHEUMATOL PUBL CO
DOI: 10.3899/jrheum.100799
关键词
SYSTEMIC LUPUS ERYTHEMATOSUS; FATIGUE; FUNCTIONAL ASSESSMENT OF CHRONIC ILLNESS THERAPY-FATIGUE
类别
资金
- Genentech Inc.
Objective. Fatigue is a common symptom of systemic lupus erythematosus (SLE). Our objective was to validate the 13-item Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue scale in patients with SLE. Methods. The FACIT-Fatigue, Medical Outcomes Study Short-Form-36 (SF-36) questionnaire, Brief Pain Inventory (BPI), and Patient Global Assessment Visual Analog Scale (Patient-GA) were completed at baseline and at Weeks 12, 24, and 52 by patients with moderately to severely active extrarenal SLE. The patients were participating in a rituximab clinical trial. The British Isles Lupus Assessment Group (BILAG) disease activity index and the Physician Global Assessment Visual Analog Scale (Physician-GA) were completed by physicians at the same visits. Results. At baseline, 254 patients completed the FACIT-Fatigue scale. Cronbach's alpha was > 0.95 at all visits. In cross-sectional analyses, FACIT-Fatigue scores differentiated between groups defined by BILAG General domain ratings. FACIT-Fatigue had moderate-high correlations (r = 0.5-0.8) with SF-36, BPI, and Patient-GA, but poor correlations with BILAG total score and Physician-GA (r = 0.1-0.3). At Weeks 12, 24, and 52, mean FACIT-Fatigue scale improvement was higher in patients who improved versus those who remained unchanged on the BILAG General domain. FACIT-Fatigue scale scores remained stable for patients with worsened BILAG General domain ratings compared to baseline. Distribution and anchor-based estimates suggested a minimally important difference (MID) range of 3-6 points. Conclusion. The FACIT-Fatigue scale is a valid and responsive measure of fatigue in patients with SLE. MID in this SLE sample is similar to that derived previously in other populations. Since few patients experienced worsening BILAG General and Musculoskeletal domains in this study, further research is warranted to evaluate the responsiveness of FACIT-Fatigue to worsening of these domains. (First Release Jan 15 2011; J Rheumatol 2011;38:672-9; doi:10.3899/jrheum.100799)
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