• Luca Molinari, Rio-PertuzGaspar DelGDCenter for Critical Care Nephrology, University of Pittsburgh, Pittsburgh, PA; Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN., Priyanka Priyanka, Ali Smith, Joseph C Maggiore, Jason Kennedy, Hernando Gomez, Christopher W Seymour, John A Kellum, and ProCESS and ProGReSS-AKI Investigators.
• Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA; Center for Critical Care Nephrology, University of Pittsburgh, Pittsburgh, PA; Department of Translational Medicine, Università degli Studi del Piemonte Orientale, Novara, Italy.
• Chest. 2024 Sep 1; 166 (3): 480490480-490.

BackgroundSepsis is the most common cause of acute kidney injury (AKI) in critically ill patients. Four phenotypes (α, β, γ, δ) for sepsis, which have different outcomes and responses to treatment, were described using routine clinical data in the electronic health record.Research QuestionDo the frequencies of AKI, acute kidney disease (AKD), chronic kidney disease (CKD), and AKI on CKD differ by sepsis phenotype?Study Design And MethodsThis was a secondary analysis of a randomized clinical trial of early resuscitation, including patients with septic shock at 31 sites. After excluding patients with end-stage kidney disease and missing data, we determined frequencies of the following clinical outcomes: AKI (defined within 24 h as Kidney Disease: Improving Global Outcomes stages 2 or 3 or stage 1 with tissue inhibitor of metalloproteinases-2 × insulin-like growth factor binding protein 7 value of > 2.0), CKD, and AKD (persistence of AKI at any stage on day 7 after enrollment) across four phenotypes. We performed multivariable logistic regression to assess the risk-adjusted association between development of AKI and AKD and phenotype.ResultsAmong 1,090 eligible patients, 543 patients (50%) had AKI. Across phenotypes, the frequencies of AKI varied, being highest in the δ and β phenotypes (78% and 71%, respectively) and the lowest in the α phenotype (26%; P < .001). AKD occurred most often in the δ phenotype (41%) and least often in the α phenotype (8%; P < .001). The highest frequencies of CKD and of AKI on CKD were found in the β phenotype (53% and 38% respectively; P < .001 for both). In the multivariable logistic regression models (α phenotype as reference), δ phenotype showed the strongest association with AKI (OR, 12.33; 95% CI, 7.81-19.47; P < .001) and AKD (OR, 9.18; 95% CI, 5.44-15.51; P < .001).InterpretationThe rates of AKI and AKD differed across clinical sepsis phenotypes and are more common among patients with phenotypes β and δ. Phenotype β showed a higher level of underlying CKD that predisposed patients to new AKI. The α and γ phenotypes showed lower frequencies of AKI and less progression to AKD.Copyright © 2024 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.

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