Objective: To describe the serum organochlorines residues and explore the relationship between organochlorines exposure and the female breast cancer in Ningxia.
Methods: 1:1 matched case-control study based on 92 new diagnostic breast cancer patients and 92 patients without tumors from Ningxia medical university general hospital was designed. The risk factors of breast cancer were investigated by a questionnaire. GC-ECD was used to measure the serum level of organochlorines residues. The adjusted odds rations (OR) of organochlorines residues to breast cancer were evaluated by conditional Logistic regression model.
Results: 15 organochlorines residues could be detected in serum of cases and controls. The detecting rates of beta-HCH, delta-HCH, p,p'-DDE, PCB28 and PCB52 were higher than 90%. There were significant differences of serum level of beta-HCH, p,p'-DDE and PCB52 between cases and controls (P < 0.05). After adjusting confounding factors, serum beta-HCH, p,p'-DDE and PCB52 level were positively related to the risk of breast cancer (adjusted OR > 2, P < 0.05).
Conclusion: Organochlorines resides, including DDT, HCH and PCB, may increase women's risk of getting breast cancer.
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