Abstract
Background Malnutrition influences clinical outcomes. Although various screening tools are available to assess nutrition status, their use in the intensive care unit (ICU) has not been rigorously studied. Our goal was to compare the Nutrition Risk in Critically Ill (NUTRIC) to the Nutritional Risk Screening (NRS) 2002 in terms of their associations with macronutrient deficit in ICU patients. Methods We performed a retrospective analysis to investigate the relationship between NUTRIC vs NRS 2002 and macronutrient deficit (protein and calories) in critically ill patients. We performed linear regression analyses, controlling for age, sex, race, body mass index, and ICU length of stay. We then dichotomized our primary exposures and outcomes to perform logistic regression analyses, controlling for the same covariates. Results The analytic cohort included 312 adults. Mean NUTRIC and NRS 2002 scores were 4 +/- 2 and 4 +/- 1, respectively. Linear regression demonstrated that each increment in NUTRIC score was associated with a 49 g higher protein deficit (beta = 48.70: 95% confidence interval [CI] 29.23-68.17) and a 752 kcal higher caloric deficit (beta = 751.95; 95% CI 447.80-1056.09). Logistic regression demonstrated that NUTRIC scores >4 had over twice the odds of protein deficits >= 300 g (odds ratio [OR] 2.35; 95% CI 1.43-3.85) and caloric deficits >= 6000 kcal (OR 2.73; 95% CI 1.66-4.50) compared with NUTRIC scores <= 4. We did not observe an association of NRS 2002 scores with macronutrient deficit. Conclusion Our data suggest that NUTRIC is superior to NRS 2002 for assessing malnutrition risk in ICU patients. Randomized, controlled studies are needed to determine whether nutrition interventions, stratified by NUTRIC score, can improve patient outcomes.
