临床实验证实乳房摄片筛查的使用和治疗方法的改进可改善女性乳腺癌的预后。KennethC.Chu等人对来自国家卫生统计中心的死亡率数据和国立癌症研究所SEER的发病、生存资料，按病人年龄分层，使用回归统计分析得出，从1989年到1993年美国白人妇女乳腺癌年龄调整死亡率下降了6．8 Clinical trials have confirmed that the use of mammographic screening and treatment improvements can improve the prognosis of breast cancer in women. Kenneth C.Chu et al. calculated the mortality data from the National Center for Health Statistics and the incidence and survival data of the National Cancer Institute SEER according to the patient’s age. Using regression analysis, we found that the white women from 1989 to 1993 were breast cancers in the United States. Cancer age adjusted mortality decreased by 6.8