title: Relationship between exposure to extremely low-frequency electromagnetic fields and breast cancer risk: a meta-analysis.
abstract: OBJECTIVE
  To comprehensively analyze the relationship between human exposure to extremely low frequency electromagnetic fields (ELF-EMFs) and breast cancer and to discuss the potential risk of ELF-EMFs to human breast cancer.
  
  
  METHODS
  Sixteen research reports of case-control studies which were published from 2000 to 2007 were collected. The fixed effect model (FEM) or the random effect model (REM) was chosen to calculate total ORs depending on the outcomes of the test of homogeneity (Q test): the subgroup was analyzed with the menopause and the non-menopause.
  
  
  RESULTS
  Sixteen research outcome was ORDL = 1.10, 95% CI = (1.01, 1.20), the OR(MH) of the non-menopause status group was 1.25, 95% CI = (1.05, 1.49), the OR(MH) of the menopause status group was OR(MH) = 1.04, 95% CI = (0.93, 1.18).
  
  
  CONCLUSIONS
  The authors found that ELF-EMFs may be increase the risk of human breast cancer. The women's exposure to ELF-EMFs may be the risk factor of breast cancer when they are non-menopausal.
authors.forename: G
authors.initials: G
authors.lastname: Zhao
authors.forename: X
authors.initials: X
authors.lastname: Lin
authors.forename: M
authors.initials: M
authors.lastname: Zhou
authors.forename: J
authors.initials: J
authors.lastname: Zhao
mesh_terms: D001943:Breast Neoplasms / Q000209:etiology*; D016022:Case-Control Studies; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005260:Female; D006801:Humans; D012306:Risk