Nancy Keating, assistant professor of healthcare policy at Harvard Medical School, says 77.6 percent had a mammogram 7-18 months after being diagnosed with breast cancer, and 56.7 percent had a mammogram annually three years after being diagnosed.

The study -- published in the January issue of the Journal of Clinical Oncology -- shows that women who are older, black, unmarried and living in certain regions were less likely than other women to have mammograms. National guidelines recommend strongly that all breast cancer survivors undergo annual mammography because they face an increased risk of new or recurrent breast cancer.