摘要
To the Editor:Breast cancer is the most commonly diagnosed cancer and the leading cause of cancer death among females.Due to the advantages of low pain,high resolution,and good reproducibility,mammography is widely used in early breast cancer clinical screening.Mammography density(MD)is the proportion of dense breast tissue in mammograms and is one of the strongest risk factors for breast cancer.Studies have shown that high MD increases breast cancer risk by 4 to 6 times.A previous meta-analysis of 13 case-control studies showed a positive correlation(odds ratio[OR]:1.52,95%confidence interval[CI]:1.39-1.66)between percentage dense area and breast cancer risk,[1]but it did not assess the relationship between MD and breast cancer prognosis.
基金
supported by a grant from the Hebei Key Technology Research and Development Program(No.19277739D).
