A mammogram is an x-ray of the breast that can be used to detect changes in the breast such as tumors and calcifications. The test may be done for screening or for diagnostic purposes. A positive screening mammogram leads to further testing to determine if cancer is present. Mammograms may also be used to evaluate known cases of breast cancer. Although mammograms do not detect all cases of breast cancer, they have been shown to increase early detection, thus reducing mortality. The Centers for Disease Control and Prevention (CDC) provides low-income, uninsured, and underserved women access to free or low-cost mammograms through the National Breast and Cervical Cancer Early Detection Program.
This indicator shows the percentage of women aged 40 and over who have had a mammogram in the past two years.