#2389 Enhancing immunoglobulin A nephropathy management: insights from the IGAN-MIC project

Abstract Background and Aims Immunoglobulin A nephropathy (IgAN) comprises a substantial proportion of primary glomerulonephritis cases in China, yet comprehensive nationwide data regarding its diagnosis and treatment are lacking. The Immunoglobulin A Nephropathy Management Quality Improvement Initiative Project in China (IGAN-MIC) seeks to establish an IgAN cohort collaboration network to comprehend real-world IgAN management practices in China. Method The IGAN-MIC project convened 15 Chinese experts from 14 regions to form an expert committee to develop a registry of IgAN patients to evaluate regional differences in IgAN management from 2015 to 2024. The registry will involve comprehensive data collection from electronic medical records, encompassing key aspects including demographic and clinical characteristics, renal biopsies, diagnoses, comorbidities, laboratory findings, and treatment modalities, facilitating a detailed analysis of disease progression and changes in treatment strategies from initial diagnosis through subsequent follow-up periods. Results The IGAN-MIC project has garnered applications from 78 healthcare institutions, with 7 of them already incorporated into the initiative and initiated data collection. As of January 1, 2024, the project has enrolled 543 pathologically confirmed IgAN patients diagnosed between 2015 and 2023 from these 7 centers. At the time of diagnosis, the median (IQR) of age was 38.00 (30.00, 48.00) years; 54.51% were females; the median (IQR) of eGFR was 75.41 (51.93, 104.09) mL/min/1.73 m2 and the median (IQR) 24-hour urinary protein was 1263.50 (645.30, 2362.64) mg/day. For these patients, the utilization rates of RAS inhibitors (RASi), SGLT2 inhibitors (SGLT2i) and glucocorticoids at initial treatment were 53.41%, 3.51%, and 42.73% respectively. The utilization rate of SGLT2i from 2022 to 2023 was 9.90%, as the first indication for SGLT2i in CKD was approved in China in September 2022. A detailed outline of patient baseline characteristics is presented in Table 1 below. Conclusion These initial findings in the registry showed that the Chinese IgAN patients were young, had mildly reduced renal function, and with massive proteinuria at the time of initial diagnosis. For initial treatment, only half of the patients received RASi, and only one tenth received SGLT2i. More education needs to be focused on promoting guideline-directed medical therapies in the future. Given that nationwide data on Chinese IgAN patients are limited, the IGAN-MIC project is anticipated to broaden its registry to include more healthcare institutions and Chinese IgAN patients in the future, with the aim of providing a more in-depth understanding of the changing clinical presentations and ongoing follow-up scenarios among IgAN patients, contributing crucial insights to the clinical management of IgAN.