Abstract
Prediction of major adverse kidney events in critically ill patients may help target therapy, allow risk adjustment, and facilitate the conduct of clinical trials. In a cohort comprised of all critically ill adults admitted to five intensive care units at a single tertiary care center over one year, we developed a logistic regression model for the outcome of Major Adverse Kidney Events within 30 days (MAKE30), the composite of persistent renal dysfunction, new renal replacement therapy (RRT), and in-hospital mortality. Proposed risk factors for the MAKE30 outcome were selected a priori and included age, race, gender, University Health System Consortium (UHC) expected mortality, baseline creatinine, volume of isotonic crystalloid fluid received in the prior 24 h, admission service, intensive care unit (ICU), source of admission, mechanical ventilation or receipt of vasopressors within 24 h of ICU admission, renal replacement therapy prior to ICU admission, acute kidney injury, chronic kidney disease as defined by baseline creatinine value, and renal failure as defined by the Elixhauser index. Among 10,983 patients in the study population, 1489 patients (13.6%) met the MAKE30 endpoint. The strongest independent predictors of MAKE30 were UHC expected mortality (OR 2.32 [95%CI 2.06–2.61]) and presence of acute kidney injury at ICU admission (OR 4.98 [95%CI 4.12–6.03]). The model had strong predictive properties including excellent discrimination with a bootstrap-corrected area-under-the-curve (AUC) of 0.903, and high precision of calibration with a mean absolute error prediction of 1.7%. The MAKE30 composite outcome can be reliably predicted from factors present within 24 h of ICU admission using data derived from the electronic health record.
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Funding
Biostatistical support was provided by the Vanderbilt Institute for Clinical and Translational Research (UL1 TR000445 from NCATS/NIH). M.W.S. was supported by a National Heart, Lung, and Blood Institute (NHLBI) T32 award (HL087738 09) and K12 award (K12HL133117). The funding institutions had no role in (1) conception, design, or conduct of the study, (2) collection, management, analysis, interpretation, or presentation of the data, or (3) preparation, review, or approval of the manuscript.
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McKown, A.C., Wang, L., Wanderer, J.P. et al. Predicting Major Adverse Kidney Events among Critically Ill Adults Using the Electronic Health Record. J Med Syst 41, 156 (2017). https://doi.org/10.1007/s10916-017-0806-4
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DOI: https://doi.org/10.1007/s10916-017-0806-4