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The prevalence of kidney injury indicators increased in parallel with disease severity of COVID-19. The prevalence of kidney injury according to (A) cohorts and (B) disease severity at admission. Disease severity was classified as mild and moderate, severe, or critical; 35 individuals for proteinuria, 35 individuals for hematuria, 35 individuals for in-hospital AKI, 35 individuals for prehospital AKI, and six individuals for any kidney injury were excluded due to missing data.
