Slide 42.htm Research Evidence of Net Benefit of MammographyEstimation of certainty and magnitude of net benefit (benefit minus harm):For biennial screening mammography in women aged 40 to 49 years, there is moderate certainty that the net benefit is small.http://www.uspreventiveservicestaskforce.org/uspstf09/breastcancer/brcanrs.htm Previous Slide Contents Next Slide Current as of December 2012 Internet Citation: Slide 42.htm. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/professionals/clinicians-providers/kt/webinars/tfmethods/tfmethodsld42.html