Definitions and End Points
CKD
MAY
CKD was defined if the patient previously received a diagnosis of CKD (supported either by medical record or history-taking) or if the estimated glomerular filtration rate (GFR) was below 60mL/min/1.73mPatient follow-up was conducted at 1, 6, and 12 months and annually thereafter. The clinical follow-up was completed in May 2022. Patients missing the scheduled follow-up visits were contacted by telephone. For patients lost to follow-up, mortality status was confirmed using the Korean National Health Insurance database.