Cohort profile: the PRIMETIME 1 (PRecIsion MEdicine based on kidney TIssue Molecular interrogation in diabetic nEphropathy) cohort - a longitudinal Danish nationwide study of individuals with diabetes and a performed kidney biopsy.

The national population registries in Denmark provide a long follow-up period and a distinct opportunity to use superior registry data. This cohort offers a unique opportunity to study the prognostic value of findings in kidney biopsies, the impact of comorbidity and the effect of therapy at the time of kidney biopsy, with a follow-up period increasing over time with running updates.