Meta Analysis on Relationship between Soyfood and Breast Cancer

Objective To collect literatures about breast neoplasms and soyfood，and detect the relationship between breast neoplasms and soyfood by meta analysis. Methods Using breast neoplasms and soyfood as key words ，CHKD，CBM and medline databases were searched，to collect literatures published from 2001 to 2011.And the data of literatures were analyzed by statistics software. Results Totally 14 literatures were involved.There was heterogenicity in the literatures(Q=15.7，P=0.000).According to random effects model，the pooled RR of soyfood and tofu were 0.73(95%CI:0.58~0.94) and 0.77(95%CI:0.69~0.88) respectively.It showed that soyfood could decrease the risk for breast cancer. Conclusion Soyfood might be protective factors for breast cancer，and decrease the risk of breast cancer through intake.