BCSC Mammography Data

Distribution of Number of Screening Mammograms per Woman for 1996-2007

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One strength of the BCSC data is the ability to follow women longitudinally. This figure shows the number of screening mammograms per woman in the current data from 1996-2007. While approximately 37% of the women have had only a single screening mammogram, it should not be interpreted that these women have had only one mammogram in eleven years. They may have had mammography at a facility that was not included in the BCSC. However, for women with multiple exams, we can begin to explore the effect of multiple mammograms on the performance of screening mammography.

Distribution of Mammograms in 1996-2007 by Race/Ethnicity

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This figure shows the racial distribution of 7,303,730 mammograms recorded in the Breast Cancer Surveillance Consortium for the years 1996-2007 inclusive. The BCSC standardized questions for race and ethnicity are asked in the same manner as those on the 2000 census to allow future comparisons to census data. The large number of unknowns reflects both the sensitivity of the question (some women prefer not to answer the question) and that not all radiology facilities ask about race.

Distribution of U.S. Women in 2000 by Race/Ethnicity

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This figure shows the racial distribution of approximately 139 million women in the US from the 2000 Census. The BCSC racial/ethnic distribution is similar to the 2000 data.

Number of Mammograms in 1996-2007 by Age & Year

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This figure shows the number of screening and diagnostic mammograms recorded in the BCSC data for the years 1996-2007 inclusive. There were 418,601 in 1996; 548,354 in 1997; 662,242 in 1998; 679,844 in 1999; 694,006 in 2000; 706,636 in 2001; 751,930 in 2002; 718,876 in 2003; 690,908 in 2004; 549,602 in 2005; 447,997 in 2006; and 434,734 in 2007. These data suggest that mammography is occurring commonly in women aged 40 to 59.

Months since Previous Mammogram

From Yankaskas et al. Association between mammography timing and measures of screening performance in the United States. Radiology 2005 Feb; 234(2):363-73.

Sensitivity by Months of Follow-Up and by Initial Versus Work-Up Assessment

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The following source must be cited when reproducing these data:

NCI-funded Breast Cancer Surveillance Consortium co-operative agreement (U01CA63740, U01CA86076, U01CA86082, U01CA63736, U01CA70013, U01CA69976, U01CA63731, U01CA70040). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium website - http://breastscreening.cancer.gov/ .