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Association of Relapse with Renal Outcomes under the Current Therapy Regimen for IgA Nephropathy: A Multi-Center Study

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  • Yanhong Yuan
  • Xiajing Che
  • Zhaohui Ni
  • Yifei Zhong
  • Yinghui Qi
  • Xinghua Shao
  • Qin Wang
  • Liou Cao
  • Minfang Zhang
  • Yuanyuan Xie
  • Chaojun Qi
  • Lei Tian
  • Shan Mou

Abstract

Background and Objectives: Renal relapse is a very common manifestation of IgA nephropathy (IgAN). The clinical characteristics and long-term outcomes of this condition have not yet been carefully explored. Design and Patients: Patients with biopsy-proven IgAN between January 2005 and December 2010 from three medical centers in China was a primary cohort of patients. From January 2010 to April 2012, data of an independent cohort of IgAN patients from Ren Ji Hospital, Shanghai, China was collected using the same inclusion and exclusion criteria. These patients formed the validation cohort of this study. Results: Of the patients with biopsy-proven IgAN from three medical centers, 489 patients achieved remission within 6 months following the therapy. Additionally, 76 (15.5%) of these patients experienced a relapse after achieving remission. During the median follow-up period of 66 months, 6 patients (1.4%) in the non-relapse group experienced renal deterioration, compared with 22 patients (29.6%) in the relapse group. Our study indicated that each 1-mmHg increase in the baseline diastolic blood pressure (DBP) was associated with a 4.5% increase in the risk of renal relapse; additionally, the male patients had a 3.324-fold greater risk of relapse compared with the female patients according to the adjusted multivariate Cox analysis. The nomogram was based on 489 patients achieved remission. The predictive accuracy and discriminative ability of the nomogram were determined by concordance index (C-index) and calibration curve. The results were validated using bootstrap resampling on the validation cohort. Conclusions: This study demonstrated that renal relapse is a potential predictor of prognostic outcomes in patients under the current therapeutic regimens for IgAN. And male patients with higher diastolic blood pressure had a greater risk of experiencing relapse.

Suggested Citation

  • Yanhong Yuan & Xiajing Che & Zhaohui Ni & Yifei Zhong & Yinghui Qi & Xinghua Shao & Qin Wang & Liou Cao & Minfang Zhang & Yuanyuan Xie & Chaojun Qi & Lei Tian & Shan Mou, 2015. "Association of Relapse with Renal Outcomes under the Current Therapy Regimen for IgA Nephropathy: A Multi-Center Study," PLOS ONE, Public Library of Science, vol. 10(9), pages 1-16, September.
    • Handle: RePEc:plo:pone00:0137870
    DOI: 10.1371/journal.pone.0137870
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    1. Kim, Jaehoon & Kim, Sangsin, 2015. "2012년 국회법 개정의 효과 연구 [A Study on the Effect of the 2012 National Assembly Act Amendment]," KDI Research Monographs, Korea Development Institute (KDI), volume 127, number v:2015-03(k):y:2015:p:1-1.
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