Identification of potential predictors for subtype IgA nephropathy through analyses of blood biochemical indicators

Jing Gao, Juan Cui, Yong Wang, Zhennan Dong, Yaping Tian, Ying Xu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Background: Immunoglobulin A nephropathy (IgAN), a dominant glomerulonephritis in China, has presented challenges in its early non-invasive diagnosis and accordingly has drawn considerable attention regarding the need to develop effective easy-to-conduct methods. Methods: In this retrospective study, a support vector machine-based classifier was trained to obtain a minimum subset with the highest discerning power between IgAN and non-IgAN cases in China based on 36 biochemical indicators connected with a feature-selection procedure. Results: Our analyses indicated 19 biochemical indicators with differential distributions between IgAN and non-IgAN cases, indicating their potential as classifiers. Further examination for the discerning power of all k-feature combinations indicated a 5-feature combination, ALB. +. CK. +. Cr. +. HDL. +. CA125. +. TB, which gave the best accuracy, 79.71%, in classifying all training data into the 2 subtypes of nephropathy. Moreover, two combinations, ALB. +. CK. +. AFP. +. AST and TP. +. Glu. +. DB. +. CH, were gender-specific, giving the best classification accuracies of 81.90% and 80.22% for male and female patients, respectively. These 3 classifiers achieved classification accuracies of 75.36%, 72.00% and 84.09% in the entire, the male and the female independently validated datasets, respectively. Conclusions: Blood biochemical indicators could distinguish between IgAN and non-IgAN cases with a bioinformatic algorithm, providing a promising method to diagnose the subtypes of nephropathy.

Original languageEnglish (US)
Pages (from-to)441-445
Number of pages5
JournalClinica Chimica Acta
Issue number5-6
StatePublished - Feb 20 2011
Externally publishedYes


  • Biochemical indicator
  • Exhaustive search
  • IgA nephropathy

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Biochemistry, medical


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