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Clinical Demographics for 4,032,556 Screening Mammography Examinations from 1996 - 2005

	All Screening Examinations
All examinations	4,032,556
Age (y)
<30	4,914 (0.1)
30-39	170,967 (4.2)
40-49	1,160,492 (28.8)
50-59	1,192,141 (29.6)
60-69	785,133 (19.5)
70-79	545,418 (13.5)
80+	173,491 (4.3)
Mean (y)	56.6
Median (y)	55.0
Family history of breast cancer
Yes	476,256 (14.3)
No	2,859,294 (85.7)
Unknown	697,006
Personal history of breast cancer
Yes	236,937 (7.5)
No	2,916,943 (92.5)
Unknown	878,676
Previous mammography performed
Yes	3,427,445 (90.2)
No	370,403 (9.8)
Unknown	234,708
Self-report of Symptoms
Yes	116,844 (3.2)
No	3,538,457 (96.8)
Unknown	377,255

Note: Numbers in parentheses are percentages based on non-missing values.

Note: Self-report of symptoms includes lump, discharge and other symptoms, but does not include pain.

The following source must be cited when reproducing this table: NCI-funded Breast Cancer Surveillance Consortium co-operative agreement (U01CA63740, U01CA86076, U01CA86082, U01CA63736, U01CA70013, U01CA69976, U01CA63731, U01CA70040). Downloaded xx/xx/xx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/data/benchmarks/screening/table2.html

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Maintained by the Applied Research Program,
Division of Cancer Control and Population Sciences