The relation between proteinuria and the severity of COVID-19

Author:

Fukui AkiraORCID,Takeshita Kohei,Nakashima Akio,Maruyama Yukio,Tsuboi Nobuo,Hoshina Tokio,Yokoo Takashi

Abstract

Abstract Background The association between proteinuria, which is also an indicator of chronic kidney disease (CKD), and coronavirus disease 2019 (COVID-19) severity is unclear. Methods We selected 342 hospitalized patients with COVID-19 diagnosed via polymerase chain reaction testing between February 2020 and October 2022 and who had at least one urinalysis 14–365 days before admission. Results Proteinuria before admission was associated neither with oxygen administration nor developing pneumonia in multivariate analysis (odds ratio [OR] 1.03; 95% confidence interval (CI) 0.44–2.40, p = 0.95 and OR 1.01; 95% CI 0.47–2.17, p = 0.98, respectively). Proteinuria on admission was associated both with oxygen administration and developing pneumonia in multivariate analysis (OR 3.29; 95% CI 1.37–7.88, p < 0.01 and OR 3.81; 95% CI 1.68–8.62, p < 0.01, respectively). The percentage of patients with proteinuria on admission was significantly higher than those before admission (37.4% vs. 17.8%; p < 0.01). In the subgroup analysis, proteinuria on admission among patients with eGFR ≥ 60 mL/min/1.73 m2 was associated with both oxygen administration and developing pneumonia (OR 4.86; 95% CI 1.22–19.38, p = 0.03, OR 3.65; 95% CI 1.06–12.58, p = 0.04, respectively). In contrast, proteinuria on admission among patients with eGFR < 60 mL/min/1.73 m2 was associated with developing pneumonia (OR 6.45; 95%CI 1.78–23.35, p = 0.01), not with oxygen administration (OR 3.28; 95% CI 0.92–11.72, p = 0.07). Conclusions Although underlying proteinuria before admission was not associated with COVID-19 severity, proteinuria on admission was associated with oxygen demand and developing pneumonia.

Funder

Ministry of Health, Labour and Welfare

Publisher

Springer Science and Business Media LLC

Subject

Physiology (medical),Nephrology,Physiology

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