A retrospective single-center cohort study of major subtypes of primary glomerular diseases (MN, IgAN, and MCD): clinical characteristics, prognostic outcomes, and risk factors.

Background: This study aims to investigate patients with the three major types of primary glomerular diseases who underwent kidney biopsy at our center, with the objectives of characterizing their clinical phenotypes and pathological features, and identifying risk factors for clinical outcome events. Methods: Between January 2013 and December 2023, consecutive patients diagnosed with membranous nephropathy (MN), immunoglobulin A nephropathy (IgAN), and minimal change disease (MCD) by kidney biopsy were included in this retrospective follow-up study. Outcome measures included proteinuria remission and kidney disease progression events. Multivariate-adjusted Cox proportional hazards models were utilized. Results: A total of 608 patients were included in the follow-up cohort, comprising 438 with MN, 110 with IgAN, and 60 with MCD. Clinical remission was achieved in 481 (79.1%) patients, including 333 (54.8%) with complete remission (CR) and 148 (24.3%) with partial remission (PR). Kidney disease progression occurred in 79 (13.0%) patients. After balancing for baseline data and pathological diagnoses in relation to different outcomes, 24-h urinary total protein (24 h-UTP; ≥ 3.5 g/d vs. < 3.5 g/d: HR 1.35, 95% CI 1.10-1.64, Conclusion: Undertaken at a single center, this study outlines the spectrum of current treatments, clinical outcomes, and factors influencing these outcomes among patients newly diagnosed with the three principal glomerular diseases through kidney biopsy.