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Impact of cultural and linguistic factors on symptom reporting by patients with cancer.
Wang, Xin Shelley,Cleeland, Charles S,Mendoza, Tito R,Yun, Young Ho,Wang, Ying,Okuyama, Toru,Johnson, Valen E U.S. Dept. of Health, Education, and Welfare, Publ 2010 Journal of the National Cancer Institute Vol.102 No.10
<P>Patient reporting of the severity and impact of symptoms is an essential component of cancer symptom management and cancer treatment clinical trials. In multinational clinical trials, cultural and linguistic variations in patient-reported outcomes instruments could confound the interpretation of study results.</P>
Yun, Y.H.,Lee, M.K.,Chun, H.N.,Lee, Y.M.,Park, S.M.,Mendoza, T.R.,Wang, X.S.,Cleeland, C.S. Dept. of Anesthesiology, University of Wisconsin-- 2008 Journal of pain and symptom management Vol.36 No.3
The purpose of this study was to provide normative data for the Brief Fatigue Inventory (BFI) in the general Korean population so that the results for the general population could be compared with those for patients. We constructed a questionnaire that included the BFI and items on demographic characteristics and conducted a population-based, cross-sectional survey in 1,000 individuals. We used multivariate logistic analysis to investigate factors associated with ''usual'' and ''worst'' fatigue. The internal consistency was very high (Cronbach's alpha=0.96) and construct validity was confirmed by factor analysis. All patients had a mean+/-SD BFI score of 4.33+/-2.48 for ''worst'' fatigue and of 4.07+/-2.27 for ''usual'' fatigue, and the global BFI score was 3.44+/-2.05. The prevalence of each moderate-to-severe fatigue type was similar in severity of fatigue, with 55.2% in ''usual'' fatigue, and 57.3% in ''worst'' fatigue. Among the types of fatigue, the prevalence of severe fatigue was lowest for ''usual'' fatigue (16.5%). In multivariate analyses, the group aged 40-59 years had greater levels of ''usual'' and ''worst'' fatigue compared with the group aged 20-29 years. Poor general health and the presence of comorbidities were also associated with increased ''usual'' and ''worst'' fatigue. Regular physical activity was associated with reduced levels of ''worst'' fatigue. The normal values of BFI with proper psychometric properties may help us to better understand the correlates of fatigue in the general population and patients. Our findings indicate that comorbidities should be considered when comparing fatigue data from the general population with data from patients.
Validation Study of the Korean Version of the Brief Fatigue Inventory
Yun, Young Ho,Wang, Xin Shelley,Lee, Jung Suk,Roh, Ju Won,Lee, Chang Geol,Lee, Won Sup,Lee, Keun Seok,Bang, Soo-Mee,Mendoza, Tito R.,Cleeland, Charles S. Dept. of Anesthesiology, University of Wisconsin-- 2005 Journal of Pain and Symptom Management Vol.29 No.2
<P><B>Abstract</B></P><P>The goal of this study was to evaluate the reliability and validity of the Korean version of the Brief Fatigue Inventory (BFI-K). One hundred seventy-eight cancer patients and the same number of age- and sex-matched control subjects completed the BFI-K, the European Organization for Research and Treatment of Cancer QLQ-C30 (EORTC QLQ-C30), the Beck Depression Inventory (BDI), and a Brief Pain Inventory (BPI). The Cronbach's alpha coefficient for the BFI-K was 0.956 in the cancer patient group and 0.955 in the control group. The global score and nine of the single item scores for the BFI-K were significantly correlated with the fatigue and global health status/QoL subscale of the EORTC QLQ-C30, BDI, and BPI (coefficient range 0.38–0.66). Discriminant validity showed that BFI-K could distinguish significant differences of performance status between subgroups of patients, and between the cancer patient group and the control group, as expected. Our study has shown that the BFI-K is a reliable, valid self-rating instrument in terms of its psychometric properties.</P>