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The Role of Adiponectin in Breast Cancer: A Meta-Analysis

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  • Li-Yuan Liu
  • Meng Wang
  • Zhong-Bing Ma
  • Li-Xiang Yu
  • Qiang Zhang
  • De-Zong Gao
  • Fei Wang
  • Zhi-Gang Yu

Abstract

Published results suggests that high adiponectin level may decrease the risk of breast cancer. However, available evidence on breast cancer is conflicting. Therefore a meta-analysis was performed to assess the association between blood adiponectin and breast cancer risk. PubMed database, Web of Science, Elsevier Science, Springer Link and bibliographies of retrieved articles were searched for epidemiological studies published up to March 2013. Meta-analysis was performed on the combined effect values (OR) as well as standardized mean difference (SMD) including 17 studies. Fixed or random effect pooled measure was selected on the basis of homogeneity test among studies. The publication bias was assessed by the Egger’s regression asymmetry test and Begg’s rank correlation test with Begg’s funnel plot. Subgroup analyses and sensitivity analysis were also performed. A total of 13 studies involving 3578 breast cancer cases and 4363 controls contributed to the OR analysis. The high adiponectin level did not significantly affect breast cancer risk (OR=0.902, 95% CI=0.773–1.053). After excluding articles that were the key contributors to between-study heterogeneity, the OR of high adiponectin level was associated with decreased breast cancer risk (OR=0.838, 95% CI=0.744–0.943). There was a significantly association between high adiponectin level and postmenopausal breast cancer women (OR=0.752, 95%CI=0.604-0.936); and it was not associated with premenopausal breast cancer women (OR=0.895, 95%CI=0.638-1.256). The result of pooled measure on SMD was that the high adiponectin level was associated with decreased breast cancer risk (SMD= -0.348, 95% CI= -0.533--0.614) after excluding articles which were the key contributors to between-study heterogeneity. Our findings indicate that high adiponectin level might decrease the risk of postmenopausal breast cancer. More randomized clinical trials and observational studies are needed to confirm this association with underlying biological mechanisms in the future.

Suggested Citation

  • Li-Yuan Liu & Meng Wang & Zhong-Bing Ma & Li-Xiang Yu & Qiang Zhang & De-Zong Gao & Fei Wang & Zhi-Gang Yu, 2013. "The Role of Adiponectin in Breast Cancer: A Meta-Analysis," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-1, August.
    • Handle: RePEc:plo:pone00:0073183
    DOI: 10.1371/journal.pone.0073183
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    References listed on IDEAS

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    1. Aurelio Tobias, 1999. "Assessing the influence of a single study in the meta-anyalysis estimate," Stata Technical Bulletin, StataCorp LP, vol. 8(47).
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