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乳腺癌已成为威胁妇女生命健康的第一位癌症。国内已有数家单位对城市妇女作了乳腺癌的流行病学调查，但目前农村地区妇女乳腺癌发病的危险因素的调查较少。我们于1996年在浙江省慈溪市农村地区对乳腺癌作了病例一对照调查，为乳腺癌的防治提供依据。一、材料和方法1．材料：本
Breast cancer has become the first cancer that threatens the health of women. Several domestic units have conducted epidemiological investigations of breast cancer in urban women. However, there are fewer investigations of risk factors for breast cancer in rural areas. We conducted a case-control survey on breast cancer in a rural area of Cixi, Zhejiang Province in 1996 to provide evidence for the prevention and treatment of breast cancer. First, materials and methods Material: This