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J Clin Med . Acute Kidney Disease and Mortality in Acute Kidney Injury Patients with COVID-19

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  • J Clin Med . Acute Kidney Disease and Mortality in Acute Kidney Injury Patients with COVID-19


    J Clin Med


    . 2021 Oct 6;10(19):4599.
    doi: 10.3390/jcm10194599.
    Acute Kidney Disease and Mortality in Acute Kidney Injury Patients with COVID-19


    Filipe Marques 1 , Joana Gameiro 1 , João Oliveira 1 , José Agapito Fonseca 1 , Inês Duarte 1 , João Bernardo 1 , Carolina Branco 1 , Claúdia Costa 1 , Carolina Carreiro 1 , Sandra Braz 1 , José António Lopes 1



    Affiliations

    Abstract

    Background: The incidence of AKI in coronavirus disease 2019 (COVID-19) patients is variable and has been associated with worse prognosis. A significant number of patients develop persistent kidney damage defined as Acute Kidney Disease (AKD). There is a lack of evidence on the real impact of AKD on COVID-19 patients. We aim to identify risk factors for the development of AKD and its impact on mortality in COVID-19 patients.
    Methods: Retrospective analysis of COVID-19 patients with AKI admitted at the Centro Hospitalar Universitário Lisboa Norte between March and August of 2020. The Kidney Disease Improving Global Outcomes (KDIGO) classification was used to define AKI. AKD was defined by presenting at least KDIGO Stage 1 criteria for >7 days after an AKI initiating event.
    Results: In 339 COVID-19 patients with AKI, 25.7% patients developed AKD (n = 87). The mean age was 71.7 ± 17.0 years, baseline SCr was 1.03 ± 0.44 mg/dL, and the majority of patients were classified as KDIGO stage 3 AKI (54.3%). The in-hospital mortality was 18.0% (n = 61). Presence of hypertension (p = 0.006), CKD (p < 0.001), lower hemoglobin (p = 0.034) and lower CRP (p = 0.004) at the hospital admission and nephrotoxin exposure (p < 0.001) were independent risk factors for the development of AKD. Older age (p = 0.003), higher serum ferritin at admission (p = 0.008) and development of AKD (p = 0.029) were independent predictors of in-hospital mortality in COVID-19-AKI patients.
    Conclusions: AKD was significantly associated with in-hospital mortality in this population of COVID-19-AKI patients. Considering the significant risk of mortality in AKI patients, it is of paramount importance to identify the subset of higher risk patients.

    Keywords: COVID-19; acute kidney disease; acute kidney injury.

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