Slide 31.htm Research Evidence of Benefit: Mammography by Age GroupAgeTrials included, nRR for Breast Cancer Mortality (95% CrI)NNI to Prevent 1 Breast Cancer Death (95% CrI)39-49 y80.85 (0.75-0.96)1904 (929-6378)50-59 y60.86 (0.75-0.99)1339 (322-7455)60-69 y20.68 (0.54-0.87)377 (230-1050)70-74 y11.12 (073-1.72)Not availablehttp://www.uspreventiveservicestaskforce.org/uspstf09/breastcancer/brcanup.htm#tab1 Previous Slide Contents Next Slide Current as of December 2012 Internet Citation: Slide 31.htm. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/professionals/clinicians-providers/kt/webinars/tfmethods/tfmethodsld31.html