Population and study design:
We conducted a retrospective, analytical and observational cohort study in a population consisted in patients with chronic kidney disease (CKD) with stages 1- 5 from the Hospital Edgardo Rebagliati Martins (EsSalud) in Lima, Peru. The inclusion criteria were: Patient with CKD who enters the surveillance system of the Chronic Kidney Disease Management Unit (SSCKD) between 2016 and 2018 and patient with complete blood count with a maximum separation month between the start of follow-up and the blood test. The exclusion criteria were: Patient with CKD stage 5 in dialysis and patient with a history of renal transplantation.