Objectives: This study in critically ill patients with shock assessed the prognostic value of body weight variations occurring each day from day 3 to day 7 on the 30-day outcome in terms of mortality, occurrence of ventilator-associated pneumonia and of bedsore, and occurrence of length of stay . Design: Retrospective analysis of data. Multivariate subdistribution survival models were used at each day, from day 3 to day 7. The impact of body weight variations on length of stay was estimated through a multivariate negative binomial regression model. Setting: Prospective multicenter cohort study. Patients: Critically ill patients admitted in ICU with shock and requiring mechanical ventilation within 48 hours. Intervention: None. Measurements and Main Results: Two-thousand three-hundred seventy-four patients were included. Their median body weight variations increased from 0.4 kg (interquartile range, 0–4.8 kg) on day 3 to 3 kg (interquartile range, –0.4 to 8.2 kg) on day 7. Categories of body weight variations were defined depending on body weight variations interquartiles: weight loss, no weight gain, moderate and severe weight gain. A severe weight gain tended to be associated with death at days 5 and 6 (day 5: subdistribution hazard ratio, 1.27; 95% CI, 0.99–1.63; p = 0.06 and day 6: subdistribution hazard ratio, 1.43; 95% CI, 1.08–1.89; p = 0.01), a weight loss tended to be associated with bedsore, and a severe gain between at days 5 and 6 was associated with ventilator-associated pneumonia. Any body weight variations were associated with an increased length of stay. Conclusions: In survivors at day 3, body weight variations during the first days of ICU stay might be a clinically relevant tool to prevent weight gain but also for prognostication of 30-day mortality, occurrence of ventilator-associated pneumonia, and occurrence of prolonged ICU stay. Drs. Gros and Dupuis contributed equally to the article as co-first authors. Members of the OUTCOMEREA Study Group are listed in the Acknowledgments. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal’s website (https://ift.tt/29S62lw). Supported, in part, by the OUTCOMEREA study group (Aulnay ss bois, France). Dr. Azoulay’s institution received research support from Alexion, Fisher & Payckle, Gilead, Jazz Pharma, Ablynx, and Astellas, and he received funding from lectures for Alexion, Gilead, Baxter, and Merck. Dr. Darmon received other support outside the submitted work from Merck (research grant, speaker fees, and support in organizing educational meetings), Astute medical (research grant), Astellas (speaker fees and support in organizing educational meetings), Bristol Myers Squibb (speaker fees), JazzPharma (support in organizing educational meetings), and Sanofi-Aventis (advisory board). The remaining authors have disclosed that they do not have any potential conflicts of interest. For information regarding this article, E-mail: Jean-francois.timsit@aphp.fr Copyright © by 2018 by the Society of Critical Care Medicine and Wolters Kluwer Health, Inc. All Rights Reserved.
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