• Journal of critical care · Oct 2022

    Observational Study

    Changes in body composition in the year following critical illness: A case-control study.

    • Matthew Thackeray, Mark A Kotowicz, Julie A Pasco, Mohammadreza Mohebbi, and Neil Orford.
    • Deakin University, IMPACT (Institute of Mental and Physical Health and Clinical Translation), Geelong, Australia; Barwon Health, Geelong, Australia. Electronic address: mthack@barwonhealth.org.au.
    • J Crit Care. 2022 Oct 1; 71: 154043.

    PurposeTo measure changes in dual x-ray absorptiometry (DXA) derived body composition in Intensive Care Unit (ICU) survivors in the year following discharge and compare to population controls.Materials And MethodsUsing prospective observational data changes in hip and spine DXA estimated lean and fat mass between ICU discharge and 1-year follow-up were calculated and compared with age-sex-height matched controls from the Geelong Osteoporosis Study via multivariable linear regression.ResultsSixty-four participants were included, with median age 68.8 yr [IQR 60.8, 74.6], ICU length of stay 6.5 d [IQR 4, 9] and duration of mechanical ventilation 87 h [IQR 47, 143]. ICU survivors demonstrated greater annual increases in lean (+0.92 kg; 95%CI 0.67 to 1.18, p < 0.01) and fat mass (+2.50 kg, 95%CI 1.94 to 3.05; p < 0.01) than controls. At 1-yr follow-up, the ICU group had lower lean mass (-0.96 kg, 95%CI -1.91 to -0.01; p = 0.047) and greater fat mass (6.79 kg, 95%CI 4.55 to 9.03; p < 0.001).ConclusionsMechanically ventilated adult ICU patients gained lean mass in the year following critical illness but did not reach the level of matched population-based peers. Understanding the factors associated with, and effect of increasing muscle mass and reducing fat mass in the year after critical illness requires further investigation.Copyright © 2022 Elsevier Inc. All rights reserved.

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