Clinical characteristics and risk factors associated with acute kidney injury among patients hospitalized with primary COVID-19 infection
Keywords:
Acute kidney injury, clinical characteristics, COVID-19, risk factorsAbstract
Background: Coronavirus disease 19 (COVID-19) primarily affects the respiratory system with symptoms ranging from mild to severe. In addition, acute kidney injury (AKI) is an important complication of COVID-19 that causes substantially high morbidity and mortality rates. During the COVID-19 pandemic, public healthcare in Thailand experienced many cases and complications thereof.
Objective: This study aimed to establish the incidence, clinical characteristics, independent risk factors of AKI, and mortality in patients hospitalized with COVID-19 with or without AKI.
Methods: This was a retrospective; observational study performed in Lerdsin Hospital from August 2021 to August 2022. A total of 576 patients who were hospitalized with a diagnosis of COVID-19 infection were analyzed. AKI was diagnosed based on the extended Kidney Disease Global Outcomes criteria. Clinical characteristics were compared between patients with COVID-19 with or without AKI. Furthermore, independent risk factors were reported using adjusted odds ratios (aORs).
Results: One hundred and forty-five patients with COVID-19 developed AKI. The AKI group exhibited a higher proportion of male, older patients, and a higher rate of pneumonia. The independent risk factors were male gender (aOR, 1.8; 95% confidence interval (CI): 1.2–3.0), age ≥ 60 years (aOR, 2.0; 95% CI: 1.2–3.5), chronic kidney disease (aOR, 5.5; 95% CI: 2.0–14.7), coronary artery disease (aOR, 3.3; 95% CI: 1.1–9.2), pneumonia (aOR, 4.0; 95% CI: 1.5–10.5), serum potassium ≥4.5 mEq/L (aOR, 2.3; 95% CI: 1.1–5.0), and serum bicarbonate < 22 mEq/L (aOR, 2.4; 95% CI: 1.3–4.3). Patients with a history of COVID-19 vaccination exhibited a reduced incidence of AKI (aOR, 0.5; 95% CI: 0.3–0.8).
Conclusion: The identified independent risk factors offered predictive potential for the development of AKI. Administration of the COVID-19 vaccine in patients with COVID-19 potentially protected them against AKI.
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