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Validation of the Oxford classification of IgA nephropathy for pediatric patients from China

Weibo Le1, Cai-Hong Zeng, Zhangsuo Liu

  • 1Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China.

BMC Nephrology
|November 28, 2012
PubMed

Insights

Tubular atrophy/interstitial fibrosis is the key predictor of kidney outcomes in children with IgA nephropathy (IgAN). This finding validates the Oxford classification

Area of Science:

  • Nephrology
  • Pediatric Nephrology
  • Renal Pathology

Background:

  • The Oxford classification aids in predicting IgA nephropathy (IgAN) prognosis.
  • Validation in diverse pediatric populations is needed for the Oxford classification.
  • IgA nephropathy is a common cause of glomerulonephritis in children.

Purpose of the Study:

  • To evaluate the Oxford classification's utility in predicting renal outcomes in Chinese children with IgAN.
  • To identify pathological predictors of renal function decline in pediatric IgAN.

Main Methods:

  • Retrospective analysis of 218 children with IgAN from 7 Chinese renal centers.
  • Inclusion criteria mirrored the original Oxford study.
  • Median follow-up of 56 months to assess renal outcomes (ESRD or 50% GFR decline).

Main Results:

  • Tubular atrophy/interstitial fibrosis (T1/T2) and segmental glomerulosclerosis (S1) were significant univariate predictors.
  • Mesangial proliferation (M1), endocapillary proliferation (E1), and crescents were not significant predictors.
  • Tubular atrophy/interstitial fibrosis remained the sole independent predictor in multivariate analysis (HR 2.9, P=0.04).

Conclusions:

  • Tubular atrophy/interstitial fibrosis is the primary pathological feature associated with poor renal outcomes in Chinese children with IgAN.
  • The Oxford classification's T score is crucial for risk stratification in pediatric IgAN.
  • Further validation of the Oxford classification in diverse ethnic groups is warranted.
Abstract

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