Three-year mortality in 30-day survivors of critical care with acute kidney injury : data from the prospective observational FINNAKI study

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Mildh , H , Pettilä , V , Korhonen , A-M , Karlsson , S , Ala-Kokko , T , Reinikainen , M , Vaara , S & FINNAKI Study Grp 2016 , ' Three-year mortality in 30-day survivors of critical care with acute kidney injury : data from the prospective observational FINNAKI study ' Annals of intensive care , vol. 6 , 118 . DOI: 10.1186/s13613-016-0218-5

Title: Three-year mortality in 30-day survivors of critical care with acute kidney injury : data from the prospective observational FINNAKI study
Author: Mildh, Henriikka; Pettilä, Ville; Korhonen, Anna-Maija; Karlsson, Sari; Ala-Kokko, Tero; Reinikainen, Matti; Vaara, Suvi; FINNAKI Study Grp
Contributor: University of Helsinki, Clinicum
University of Helsinki, Department of Diagnostics and Therapeutics
University of Helsinki, Department of Diagnostics and Therapeutics
University of Helsinki, Department of Diagnostics and Therapeutics
Date: 2016-11-29
Language: eng
Number of pages: 9
Belongs to series: Annals of intensive care
ISSN: 2110-5820
URI: http://hdl.handle.net/10138/174740
Abstract: Background: The role of an episode of acute kidney injury (AKI) in long-term mortality among initial survivors of critical illness is controversial. We aimed to determine whether AKI is independently associated with decreased survival at 3 years among 30-day survivors of intensive care. Results: We included 2336 30-day survivors of intensive care enrolled in the FINNAKI study conducted in seventeen medical-surgical ICUs in Finland during a 5-month period in 2011-2012. The incidence of AKI, defined by the Kidney Disease: Improving Global Outcomes criteria, was 34.6%, and 192 (8.3%) commenced RRT. The 3-year mortality among AKI patients was 23.5% (95% CI 20.6-26.4%) compared to 18.9% (17.0-20.9%) of patients without AKI, p = 0.01. However, after adjustments using Cox proportional hazards regression, AKI was not associated with decreased 3-year survival (HR 1.05; CI 95% 0.86-1.27), whereas advanced age, poor pre-morbid functional performance, and presence of several comorbidities were. Additionally, we matched AKI patients to non-AKI patients 1: 1 according to age, gender, presence of severe sepsis, and a propensity score to develop AKI. In the well-balanced matched cohort, 3-year mortality among AKI patients was 136 of 662 (20.5%; 17.5-23.6%) and among matched non-AKI patients 143 of 662 (21.6%; 18.5-24.7%), p = 0.687. Neither AKI nor RRT was associated with decreased survival at 3 years in the sensitivity analyses that excluded patients (1) with chronic kidney disease, (2) with AKI not commenced renal replacement therapy (RRT), and (3) with estimated pre-admission creatinine, chronic kidney disease, or AKI stage 1. Conclusion: AKI was not an independent risk factor for 3-year mortality among 30-day survivors. Increased 3-year mortality among patients with AKI who survive critical illness may not be related to AKI per se, but rather to advanced age and pre-existing comorbidities.
Subject: Acute kidney injury
Renal replacement therapy
Long-term mortality
Intensive care
LONG-TERM MORTALITY
INTENSIVE-CARE
SERUM CREATININE
RISK-FACTORS
DISEASE
DEATH
GUIDELINES
SURGERY
ILLNESS
COHORT
3126 Surgery, anesthesiology, intensive care, radiology
3121 Internal medicine
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