The impact of malnutrition on morbidity, mortality, length of hospital stay and costs evaluated through a multivariate model analysis

  • M Isabel T. D. Correia
    Affiliations
    Department of Surgery, Faculdade de Medicina da, Universidade Federal de Minas Gerais, Brazil
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  • Dan L Waitzberg
    Affiliations
    Department of Gastroenterology — Digestive Surgery Discipline, Faculdade de Medicina da, Universidade de São Paulo, Brazil (Correspondence to: MITDC, Department of Surgery, Faculdade de Medicina da, Universidade Federal de Minas Geris, Rua Gonçalves Dias 332 apt. 602 Belo Horizonte, MG 30140-090, Brazil)
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      Abstract

      Malnutrition has been identified as affecting patient outcome. The purpose of this study was to correlate the nutritional status of hospitalized patients with their morbidity, mortality, length of hospital stay and costs. The patients were nutritionally assessed within the first 72h of hospital admission. The patients’ charts were surveyed on the incidence of complications and mortality. Hospital costs were calculated based on economic tables used by insurance companies. Multivariate logistic regression analysis and the Cox regression model were used to identify possible confounding factors. A P<0.05 was considered statistically significant.
      The mean age was 50.6±17.3 years with 50.2% being male. The incidence of complications in the malnourished was 27.0% [Relative risk (RR)=1.60]. Mortality in the malnourished patients was 12.4% vs 4.7% in the well nourished (RR = 2.63). Malnourished patients stayed in the hospital for 16.7±24.5 days vs 10.1±11.7 days in the nourished. Hospital costs in malnourished patients were increased up to 308.9%.
      It was concluded that malnutrition, as analyzed by a multivariate logistic regression model, is an independent risk factor impacting on higher complications and increased mortality, length of hospital stay and costs.

      Keywords

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