title: Hepatitis B vaccine response in obesity: A meta-analysis.
abstract: Hepatitis B vaccination is critical in preventing hepatitis B virus (HBV) infection and transmission. However, the impact of obesity on immune response to hepatitis B vaccine remains unclear.
  
  
  
  We performed a meta-analysis of the literature and summarized the results of immune response to hepatitis B vaccine among persons with and without obesity. We used Pubmed, Embase, Web of Science and Cochrane Library to identify all related studies between January 1973 and November 2015. Unadjusted and adjusted pooled OR and 95% CI were calculated by fixed-effect model or random-effect model according to the heterogeneity of the selected studies.
  
  
  
  Totally, 16 studies contributed to the present meta-analysis. Fifteen of them provided absolute numbers of non-responders in obese group and non-obese group. Overall, we found that the obese population was significantly associated with non-response to hepatitis B vaccination (adjusted OR: 2.46, 95% CI: 1.50-4.03). Significant heterogeneity was present in most of the pooled analyses, but was markedly reduced when analyses were restricted to study reports with uniform criteria of obesity and restricted to study in adults. No publication bias was observed in the present analysis.
  
  
  
  The present meta-analysis suggested that obesity is significantly associated with the decreased response to hepatitis B vaccines. Future studies should be performed to unravel this relationship in order to prevent HBV infection and transmission.
authors.affiliation: Department of Epidemiology and Statistics, School of Public Health, Jiangsu Key Laboratory and Translational Medicine for Geriatric Disease, Medical College of Soochow University, Suzhou 215123, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Fan
authors.affiliation: Suzhou Industrial Park Centers for Disease Control and Prevention, Suzhou 215123, China.
authors.forename: Xiao-Fang
authors.initials: XF
authors.lastname: Chen
authors.affiliation: Department of Epidemiology and Statistics, School of Public Health, Jiangsu Key Laboratory and Translational Medicine for Geriatric Disease, Medical College of Soochow University, Suzhou 215123, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Shen
authors.affiliation: Department of Epidemiology and Statistics, School of Public Health, Jiangsu Key Laboratory and Translational Medicine for Geriatric Disease, Medical College of Soochow University, Suzhou 215123, China. Electronic address: guozhirong28@163.com.
authors.forename: Zhi-Rong
authors.initials: ZR
authors.lastname: Guo
authors.affiliation: Department of Epidemiology and Statistics, School of Public Health, Jiangsu Key Laboratory and Translational Medicine for Geriatric Disease, Medical College of Soochow University, Suzhou 215123, China. Electronic address: cdong@suda.edu.cn.
authors.forename: Chen
authors.initials: C
authors.lastname: Dong
mesh_terms: D006509:Hepatitis B / Q000517:prevention & control*; D017325:Hepatitis B Vaccines / Q000276:immunology* / Q000627:therapeutic use; D006801:Humans; D009765:Obesity / Q000276:immunology*
chemical_list: D017325:Hepatitis B Vaccines
keywords: Hepatitis B vaccine; Meta-analysis; Obesity