乳房X光筛查是妇女保健中一个既定的部分,但它们所带来的麻烦是否比他们的价值多呢?早在1980年,加拿大的研究人员就试图搞清一个问题:究竟有多少妇女可以因乳腺癌筛查而获益?当时,许多研究人员希望通过这个相对较新的技术可以在肿瘤有机会生长之前就检测到它们。然而事情远非这么简单。加拿大的一项试验纳入了来自加拿大全境的近90 000名妇女,将她们随机分配分别接受乳房X光检查或乳房体格检查或者只是 Mammograms are an established part of women’s health, but are they more troublesome than their worth? As early as 1980, Canadian researchers were trying to figure out the question: How many women could Benefit from Breast Cancer Screening At the time, many researchers hoped that this relatively new technique would detect tumors before they had a chance to grow. However, things are far from simple. A Canadian study included nearly 90,000 women from across Canada, who were randomly assigned to either mammograms or breast biopsy, or just