CKD and Rapid Kidney Function Decline During the COVID-19 Pandemic.

Rationale & Objective: The direct and indirect effects of the coronavirus disease 2019 (COVID-19) pandemic on kidney function in the chronic kidney disease (CKD) population are not well understood.

Study Design: Cohort study.

Setting & Participants: Retrospective study of kidney function trajectories using deidentified administrative claims and laboratory data for Medicare Advantage and commercially insured enrollees with CKD stages G3-4 between 2018 and 2021.