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©2013 UpToDate ® Print Email Breast cancer screening in women >50 years, according to life expectancy Age, years Life expectancy, years* Risk of dying from breast cancer, percent • Number needed to screen over remaining lifetime 50 40 4.4 95 33 3.1 133 24.5 2.0 226 70 21.3 3.3 142 15.7 2.2 242 9.5 1.2 642 75 17 2.8 176 11.9 1.8 330 6.8 0.9 1361 80 13 2.4 240 8.6 1.5 533 4.6 0.7 - 85 9.6 1.9 417 5.9 1.2 2131 2.9 0.6 - 90 6.8 1.4 1066 3.9 0.8 - 1.8 0.4 - * Life expectancy is depicted as the upper, middle, and lower quartiles of life expectancy for the United States population; placing an individual into the appropriate quartile depends upon a number of factors, including the number and severity of comorbid conditions and functional impairments. • Risk of dying refers to the risk of dying of breast cancer during the remaining lifetime. Data from: Walter LC, Covinsky KE, JAMA 2001; 285:2750.