Kidney disease and all-cause mortality in patients with COVID-19 hospitalized in Genoa, Northern Italy

Kidney disease and all-cause mortality in patients with COVID-19 hospitalized in Genoa, Northern Italy

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Background

The prevalence of kidney involvement during SARS-CoV-2 infection has been reported to be high. Nevertheless, data are lacking about the determinants of acute kidney injury (AKI) and the combined effect of chronic kidney disease (CKD) and AKI in COVID-19 patients.

Methods

We collected data on patient demographics, comorbidities, chronic medications, vital signs, baseline laboratory test results and in-hospital treatment in patients with COVID-19 consecutively admitted to our Institution. Chronic kidney disease was defined as eGFR<60 mL/min per 1.73 m2 or proteinuria at urinalysis within 180 days prior to hospital admission. AKI was defined according to KDIGO criteria. The primary and secondary outcomes were the development of AKI and death.

Results

Of  777 patients eligible for the study, acute kidney injury developed in 176 (22.6%). Of  these, 79 (45%) showed an acute worsening of a pre existing CKD, and 21 (12%) required kidney replacement therapy. Independent associates of AKI were chronic kidney disease, C-reactive protein (CRP) and ventilation support.

Among patients with acute kidney injury, 111 died (63%) and its occurrence increased the risk of death by 60% (HR 1.60 [95% IC 1.21–2.49] p=0.002) independently of potential confounding factors including hypertension, pre existing kidney damage, and comorbidities.

Conclusion 

Awareness of kidney function, both pre existing CKD and development of acute kidney injury, may help to identify those patients at increased risk of death.

Credits

Russo, E., Esposito, P., Taramasso, L. et al. Kidney disease and all-cause mortality in patients with COVID-19 hospitalized in Genoa, Northern Italy. J Nephrol (2020). https://doi.org/10.1007/s40620-020-00875-1

Source: https://link.springer.com/article/10.1007/s40620-020-00875

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