• Charles Chin Han Lew, Zheng-Yii Lee, Andrew G Day, Xuran Jiang, Danielle Bear, Gordon L Jensen, Pauline Y Ng, Lauren Tweel, Angela Parillo, Daren K Heyland, and Charlene Compher.
• Department of Dietetics & Nutrition, Ng Teng Fong General Hospital, Singapore, Singapore; Faculty of Health and Social Sciences, Singapore Institute of Technology, Singapore, Singapore.
• Chest. 2024 Jun 1; 165 (6): 138013911380-1391.

BackgroundPreexisting malnutrition in critically ill patients is associated with adverse clinical outcomes. Malnutrition can be diagnosed with the Global Leadership Initiative on Malnutrition using parameters such as weight loss, muscle wasting, and BMI. International critical care nutrition guidelines recommend high protein treatment to improve clinical outcomes in critically ill patients diagnosed with preexisting malnutrition. However, this recommendation is based on expert opinion.Research QuestionIn critically ill patients, what is the association between preexisting malnutrition and time to discharge alive (TTDA), and does high protein treatment modify this association?Study Design And MethodsThis multicenter randomized controlled trial involving 16 countries was designed to investigate the effects of high vs usual protein treatment in 1,301 critically ill patients. The primary outcome was TTDA. Multivariable regression was used to identify if preexisting malnutrition was associated with TTDA and if protein delivery modified their association.ResultsThe prevalence of preexisting malnutrition was 43.8%, and the cumulative incidence of live hospital discharge by day 60 was 41.2% vs 52.9% in the groups with and without preexisting malnutrition, respectively. The average protein delivery in the high vs usual treatment groups was 1.6 g/kg per day vs 0.9 g/kg per day. Preexisting malnutrition was independently associated with slower TTDA (adjusted hazard ratio, 0.81; 95% CI, 0.67-0.98). However, high protein treatment in patients with and without preexisting malnutrition was not associated with TTDA (adjusted hazard ratios of 0.84 [95% CI, 0.63-1.11] and 0.97 [95% CI, 0.77-1.21]). Furthermore, no effect modification was observed (ratio of adjusted hazard ratio, 0.84; 95% CI, 0.58-1.20).InterpretationMalnutrition was associated with slower TTDA, but high protein treatment did not modify the association. These findings challenge current international critical care nutrition guidelines.Clinical Trial RegistrationClinicalTrials.gov; No.: NCT03160547; URL: www.Clinicaltrialsgov.Copyright © 2024 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.

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