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  • Title: Comparison between nutritional risk tools and parameters derived from bioelectrical impedance analysis with subjective global assessment.
    Author: Meireles MS, Wazlawik E, Bastos JL, Garcia MF.
    Journal: J Acad Nutr Diet; 2012 Oct; 112(10):1543-9. PubMed ID: 23017565.
    Abstract:
    BACKGROUND: Nutritional risk and malnutrition are highly prevalent among hospitalized patients. As a result, several methods have been developed to produce an adequate nutritional diagnosis. OBJECTIVE: We aimed to assess the relationship between nutritional risk tools and parameters derived from bioelectrical impedance analysis with a Subjective Global Assessment (SGA). DESIGN: A cross-sectional study was conducted from April to September 2010. PARTICIPANTS/SETTING: The study included 124 patients admitted to the Surgical Clinic I, University Hospital, Federal University of Santa Catarina, Florianópolis, Brazil, to undergo elective surgery. MAIN OUTCOME MEASURES: We utilized SGA and Nutritional Risk Screening 2002 (NRS 2002), Nutritional Risk Index (NRI), Fat-Free Mass Index (FFMI), Fat Mass Index (FMI), body cell mass as a percentage of the total weight (%BCM), and standardized phase angle (SPA). STATISTICAL ANALYSIS PERFORMED: The agreement was tested by κ coefficient, while bivariate associations were tested by Mann-Whitney U test. RESULTS: Prevalence of nutritional risk by NRS 2002 and NRI or malnutrition by SGA, FFMI, FMI, %BCM, and SPA was 19.3%, 69.5%, 35.5%, 12.9%, 8.1%, 46.8%, and 4.8%, respectively. The best agreement was between SGA and NRS 2002 (κ=.490), possibly because they constitute similar instruments. Patients identified as malnourished by SGA (B+C) showed considerably lower values of FFMI, FMI, BCM, and SPA. CONCLUSIONS: The results suggest that the NRS 2002 and parameters derived from bioelectrical impedance analysis identify patients with impaired nutritional status.
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