MPH O bjectives.
Older women have the highest breast cancer rates but are underscreened relative to their risk.
In response, Medicare introduced subsidized biennial mammogram benefits in 1991. This study examined the effect on mammography rates of an intervention that informed women about the Medicare benefit. A list frame method of subject selection was used to select random samples of eligible women from the Health Care Financing Administration's master beneficiary file. One control and 2 treatment communities participated. Mammogram use increased significantly among minorities in the treatment groups.