Background and objectives
Glomerular C3 deposition is often observed in renal biopsies of patients with IgA nephropathy (IgAN), however, the relationship between the level of C3 deposition and the long-term prognosis of IgAN have rarely been reported. In this observational cohort study, we aimed to evaluate the prognostic value of glomerular C3 deposition in the progression of IgAN.