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Development of the cohort, definitions of COVID-19–associated AKI, and comparative mortality rates. (A) Overall prevalence of AKI by different AKI definitions in a total of 336,473 adult cohorts. (B) Serum creatinine trajectories by day of admission between patient groups classified in different AKI definitions. (C) 60-day survival after diagnosis of COVID-19 in the patient shown in panel A (this analysis excluded one site with a COVID inpatient mortality rate of <1%).
