Objective: Early detection of limited physical activity and nutritional deficiencies in cancer survivors could contribute to early treatment and preservation of quality of life. The aim of this study is to describe the association of physical condition and nutritional status with fatigue and quality of life in oncological out-patients.
Methods: Data in this descriptive study was collected on bioelectrical impedance analysis, postural stability (stability index), body mass index, Karnofsky Index, quality of life (Short-Form 36-Item Health Survey) and fatigue (multidimensional fatigue inventory-20) in a consecutive sample of 203 oncological out-patients. Phase angle was calculated from bioelectrical impedance analysis. Values were intercorrelated and compared to appropriate standard values.
Results: Phase angle and stability index outcomes were far below the values of a healthy population of similar age (p < 0.001). Quality of life was significantly lower than in the normal population (p < 0.001), and the level of fatigue was significantly higher (p < 0.001). Phase angle correlated with Karnofsky Index (p = 0.002) and Short-Form 36-Item Health Survey Summary physical function (p < 0.001). Furthermore, multidimensional fatigue inventory-20 scales 'physical fatigue' and 'reduced activity' were significantly associated with phase angle (p = 0.04, p = 0.005). Stability indices correlated with Short-Form 36-Item Health Survey physical function.
Conclusion: The physical condition and the nutritional status are key components determining the individual quality of life of oncological out-patients. These variables also showed an association with the manifestation of fatigue. Results highlight the need for interdisciplinary cooperation to detect physical, nutritional and psychological deficiencies in oncological out-patients.
Keywords: Lifestyle medicine; bioelectrical impedance analysis; cancer survival; exercise; fatigue; nutrition; quality of life.