{"title":"Acute kidney injury predicts mortality in very elderly critically-ill patients","authors":"","doi":"10.1016/j.ejim.2024.05.007","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>The increasing admissions of very elderly patients to intensive care units (ICUs) over recent decades highlight a growing need for understanding acute kidney injury (AKI) in this population. Although these individuals are potentially at high risk for AKI and adverse outcomes, data on AKI in this population is scarce. This study investigates the AKI incidence and outcomes of critically-ill patients aging at least 90 years.</p></div><div><h3>Methods</h3><p>This retrospective cohort study conducted at the Department of Intensive Care Medicine, University Medical Centre Hamburg-Eppendorf, Germany (2008–2020), investigates AKI incidence and outcomes between 2008 and 2020 in critically-ill patients aged ≥ 90 years. AKI was defined according to Kidney Disease: Improving Global Outcomes (KDIGO) criteria using creatinine dynamics and/or urine output. Primary endpoint was overall mortality after 1 year. Secondary endpoints were in-hospital mortality, length of ICU and hospital stay.</p></div><div><h3>Results</h3><p>During the study period 92,958 critically-ill patients were treated and 1108 were ≥ 90 years. Of these, 1054 patients had available creatinine values and were included in the present study. AKI occurred in 24.4%, mostly classified as mild (17.5%). AKI was independently associated with a significant increase in overall mortality (HR 1.21, 95 %-CI: 1.01–1.46), in-hospital mortality (OR 2, 1.41–2.85), length of ICU (+2.8 days, 2.3–3.3) and hospital stay (+2.3 days, 0.9–3.7). Severity escalated these effects, but even mild AKI showed significance. Introducing urine-based criteria increased incidence but compromised mortality prediction.</p></div><div><h3>Conclusions</h3><p>AKI is a frequent complication in very elderly critically-ill patients. Occurrence of AKI at any stage was associated with increased mortality. Predictive ability applied to AKI defined by creatinine but not urine output. Careful attention of creatinine dynamics is essential in very elderly ICU-patients.</p></div>","PeriodicalId":50485,"journal":{"name":"European Journal of Internal Medicine","volume":null,"pages":null},"PeriodicalIF":5.9000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0953620524001936/pdfft?md5=6515fceb6fccd7f1a0f2c0be605fbdbb&pid=1-s2.0-S0953620524001936-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Internal Medicine","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0953620524001936","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 0
Abstract
Background
The increasing admissions of very elderly patients to intensive care units (ICUs) over recent decades highlight a growing need for understanding acute kidney injury (AKI) in this population. Although these individuals are potentially at high risk for AKI and adverse outcomes, data on AKI in this population is scarce. This study investigates the AKI incidence and outcomes of critically-ill patients aging at least 90 years.
Methods
This retrospective cohort study conducted at the Department of Intensive Care Medicine, University Medical Centre Hamburg-Eppendorf, Germany (2008–2020), investigates AKI incidence and outcomes between 2008 and 2020 in critically-ill patients aged ≥ 90 years. AKI was defined according to Kidney Disease: Improving Global Outcomes (KDIGO) criteria using creatinine dynamics and/or urine output. Primary endpoint was overall mortality after 1 year. Secondary endpoints were in-hospital mortality, length of ICU and hospital stay.
Results
During the study period 92,958 critically-ill patients were treated and 1108 were ≥ 90 years. Of these, 1054 patients had available creatinine values and were included in the present study. AKI occurred in 24.4%, mostly classified as mild (17.5%). AKI was independently associated with a significant increase in overall mortality (HR 1.21, 95 %-CI: 1.01–1.46), in-hospital mortality (OR 2, 1.41–2.85), length of ICU (+2.8 days, 2.3–3.3) and hospital stay (+2.3 days, 0.9–3.7). Severity escalated these effects, but even mild AKI showed significance. Introducing urine-based criteria increased incidence but compromised mortality prediction.
Conclusions
AKI is a frequent complication in very elderly critically-ill patients. Occurrence of AKI at any stage was associated with increased mortality. Predictive ability applied to AKI defined by creatinine but not urine output. Careful attention of creatinine dynamics is essential in very elderly ICU-patients.
期刊介绍:
The European Journal of Internal Medicine serves as the official journal of the European Federation of Internal Medicine and is the primary scientific reference for European academic and non-academic internists. It is dedicated to advancing science and practice in internal medicine across Europe. The journal publishes original articles, editorials, reviews, internal medicine flashcards, and other relevant information in the field. Both translational medicine and clinical studies are emphasized. EJIM aspires to be a leading platform for excellent clinical studies, with a focus on enhancing the quality of healthcare in European hospitals.