In 2009, the US Preventive Services Task Force (USPSTF) recommended against routine screening mammography for women aged 40 to 49 years and advised biennial rather than annual screening for women aged 50 to 74 years. But it appears that women and physicians have ignored these recommendations.
A new study by researchers from Harvard Medical School and Brigham and Women's Hospital in Boston found that in 2005, 2008, and 2011, the percentage of women aged 40 to 49 years reporting that they had undergone mammography screening in the previous year was the same, about 47%. As for women aged 50 to 74 years, the percentage reporting mammography screening in the previous 12 months for each year analyzed also remained essentially the same, in the upper 50% range.
Mitka M. Physicians, Patients Not Following Advice From USPSTF on Mammography Screening. JAMA. 2013;309(20):2084. doi:10.1001/jama.2013.5951