Cancer Rate (per 1,000 examinations) and Cancer Detection Rate (per 1,000 examinations) for 1,960,150 Screening Mammography Examinations from 2002 to 2006 by Time (Months) Since Previous Mammography --- based on BCSC data as of 2009

¹Screening mammography examination: Mammography examinations indicated by the radiologist to be for screening with bilateral routine views done and no other mammogram within the last 9 months among women without breast implants or a prior mastectomy or a prior breast cancer diagnosis.

² Cancers = The number of examinations with a tissue diagnosis of ductal carcinoma in situ or invasive cancer within 1 year following the examination and before the next screening mammography examination.

³Cancer rate (per 1,000 examinations) = The number of cancers among 1,000 screening mammography examinations.

⁴ Cancer detection rate (per 1,000 examinations) = The number of cancers with a positive interpretation (BI-RADS category 4, 5, or 0 --- 3 with a recommendation for immediate follow-up were recoded as 0) among 1,000 screening mammography examinations.

^* Table numbers last updated December 14, 2009. 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/xxxx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/data/performance/screening/2009/rate_time.html .

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