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Protein Energy Malnutrition Is Associated with Worse Outcomes in Sepsis—A Nationwide Analysis

      Abstract

      Background

      Protein-energy malnutrition (PEM), resulting from depleted energy and nutrient stores, compromises the body’s defense systems and may exacerbate sepsis and its impact. However, population-based studies examining the association of PEM on the prevalence and health-care burden of sepsis are lacking.

      Objective

      To investigate the relationship between PEM and sepsis, influence of PEM on clinical outcomes of sepsis, and impact of PEM on trends in sepsis mortality.

      Design

      The primary study is a retrospective cohort analysis of the 2012-2014 National Inpatient Sample (NIS) patient discharge records. Secondary analyses are cross-sectional study on the 2014 NIS and trend analysis on 2007-2014 NIS.

      Participants/setting

      The primary study included adult inpatient hospitalizations for sepsis in the United States.

      Main outcome measures

      Mortality, complicated sepsis, and 10 other metrics of clinical outcomes and health care utilization.

      Statistical analysis

      First, patients with sepsis (2014 NIS) were stratified into two groups: uncomplicated (without shock) and complicated (with shock). The adjusted odds ratio of having sepsis (total, uncomplicated, and complicated) was estimated with PEM as predictor using logistic regressions (binomial and multinomial). Second, among patients with sepsis (2012-2014 NIS), PEM cases were matched to cases without PEM (no-PEM) using a greedy-algorithm based propensity-matching methodology (1:1), and the outcomes were measured with conditional regression models. Finally, the trend in mortality from sepsis was calculated, stratified by PEM status, as an effect modifier, using Poisson models (2007-2014 NIS). All models accounted for the complex sampling methodology (SAS 9.4).

      Results

      In 2014, PEM was associated with higher odds for sepsis (3.97 [3.89 to 4.05], P<0.0001) and complicated vs uncomplicated sepsis (1.74 [1.67 to 1.81], P<0.0001). From 2012-2014, about 18% (167,133 of 908,552) of hospitalizations for sepsis had coexisting PEM. After propensity matching, PEM was associated with higher mortality (adjusted odds ratio: 1.35 [1.32 to 1.37], P<0.0001), cost ($160,724 [159,517 to 161,940] vs $86,650 [85,931 to 87,375], P<0.0001), length of stay (14.8 [14.9 to 14.8] vs 8.5 [8.5 to 8.6] days, P<0.0001), adverse events, and resource utilization. Although mortality in sepsis has been trending down from 2007-2014 (−1.19% per year, P trend<0.0001), the decrease was less pronounced among those with PEM vs no-PEM (−0.86% per year vs −1.29% per year, P<0.0001).

      Conclusions

      PEM is a risk factor for sepsis and associated with poorer outcomes among patients with sepsis. A concerted effort involving all health care workers in the prevention, identification, and treatment of PEM in community-dwelling people before hospitalization might mitigate against these devastating outcomes.

      Keywords

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      Biography

      A. C. Adejumo is an internal medicine resident, Department of Medicine, North Shore Medical Center, Salem, MA; research intern, Department of Medicine, University of Massachusetts Medical School, Worcester, MA; and a clinical instructor, Department of Medicine, Tufts University Medical School, Boston, MA.

      Biography

      O. Akanbi is an assistant professor, Division of Hospital Medicine, Department of Medicine, University of Kentucky College of Medicine, Lexington.

      Biography

      L. Pani is an endocrinologist and associate internal medicine program director, Department of Medicine, North Shore Medical Center, Salem, MA; and assistant clinical professor of medicine, Department of Medicine, Tufts University Medical School, Boston, MA.