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    Rapidly progressive iga nephropathy: clinicopathological characteristics and outcomes assessed according to the revised definition of the KDIGO 2021 guideline

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    Author
    Barratt, Jonathan
    Keyword
    crescents
    rapidly progressive IgA nephropathy
    IgA nephropathy
    Date
    2022
    
    Metadata
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    Publisher's URL
    https://academic.oup.com/ndt/advance-article/doi/10.1093/ndt/gfac004/6502370
    Abstract
    Background: Rapidly progressive IgA nephropathy (RPIgAN) is a severe clinical phenotype of IgAN, associated with a poor outcome. The recently published KDIGO 2021 Guideline for the Management of Glomerular Diseases has proposed a new definition for RPIgAN, which is based simply on a ≥ 50% decline in eGFR ≤ 3 months. Methods: In 1,677 IgAN patients followed at a single centre in China, we evaluated the utility of this new definition to identify the highest risk IgAN patients who might be suitable for combination immunosuppressive therapy. Results: The proportion of a ≥ 50% decline in eGFR ≤ 3 months was 5.2%. The majority of these patients had reversible causes, only 2.3% (39/1,677) meeting the KDIGO 2021 criteria for RPIgAN. These patients had a significantly higher risk for ESKD than non-RPIgAN patients (log rank P < 0.001). RPIgAN was an independent risk factor for ESKD (hazard ratio [HR] 3.99; 95% confidence interval [CI] 2.25 - 7.09; P < 0.001). A minority of the RPIgAN patients (25.6%) had ≥ 50% crescents. There was no significant difference in the risk for ESKD between patients in the RPIgAN group with ≥ 50% crescents and ˂ 50% crescents (log rank P = 0.27). Patients with RPIgAN and ≥ 50% crescents had a higher risk for ESKD than patients with non-RPIgAN and ≥ 50% crescents (log rank P = 0.04). Conclusions: These data support the validity of the KDIGO 2021 definition but require independent validation in other non-Chinese cohorts.
    Citation
    Yu, B., Shi, S., Lv, J., Liu, L., Zhou, X., Zhu, L., Chen, P., Yang, H., Wang, Z., Wang, S., Barratt, J., & Zhang, H. (2022). Rapidly progressive iga nephropathy: clinicopathological characteristics and outcomes assessed according to the revised definition of the KDIGO 2021 guideline. Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association, gfac004. Advance online publication. https://doi.org/10.1093/ndt/gfac004
    Type
    Article
    URI
    http://hdl.handle.net/20.500.12904/15118
    Collections
    Renal and Transplant

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