R Schwarz1, O Krauss, A Hinz. 1. Abteilung für Sozialmedizin, Universität Leipzig, Germany. schwarzr@medizin.uni-leipzig.de
Abstract
BACKGROUND: Fatigue symptoms are often found in cancer patients. One test to assess fatigue is the Multidimensional Fatigue Inventory (MFI-20). It has been successfully applied to specific groups of cancer patients. However, until now population-based norm values are missing. METHODS: We conducted an investigation on a representative sample of the adult German population, which comprised 2,037 subjects aged 14-92 years. RESULTS: The reliability of the 5 MFI-20 subscales (general fatigue, physical fatigue, reduced activity, reduced motivation, and mental fatigue) is satisfying. The correlations between MFI-20 subscales and the fatigue scale of the quality-of-life questionnaire EORTC indicate convergent validity. As an important result we found that all subscales of the MFI-20 showed a clear and nearly linear dependency on age with higher fatigue values for older subjects (p < 0.0001). Females as compared with males are characterized by higher mean values in all MFI-20 subscales (p < 0.001). CONCLUSIONS: The results show that it is necessary to take into account age and sex when different groups of cancer patients have to be compared. Copyright 2003 S. Karger GmbH, Freiburg
BACKGROUND: Fatigue symptoms are often found in cancerpatients. One test to assess fatigue is the Multidimensional Fatigue Inventory (MFI-20). It has been successfully applied to specific groups of cancerpatients. However, until now population-based norm values are missing. METHODS: We conducted an investigation on a representative sample of the adult German population, which comprised 2,037 subjects aged 14-92 years. RESULTS: The reliability of the 5 MFI-20 subscales (general fatigue, physical fatigue, reduced activity, reduced motivation, and mental fatigue) is satisfying. The correlations between MFI-20 subscales and the fatigue scale of the quality-of-life questionnaire EORTC indicate convergent validity. As an important result we found that all subscales of the MFI-20 showed a clear and nearly linear dependency on age with higher fatigue values for older subjects (p < 0.0001). Females as compared with males are characterized by higher mean values in all MFI-20 subscales (p < 0.001). CONCLUSIONS: The results show that it is necessary to take into account age and sex when different groups of cancerpatients have to be compared. Copyright 2003 S. Karger GmbH, Freiburg
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