STAR Study STAR Study The S tudy of T amoxifen a nd R aloxifene, known as STAR, is one of the largest breast cancer prevention trials ever undertaken. Close to 500 centers in the United States, Canada and Puerto Rico are participating. The Ireland Cancer Center at University Hospitals of Cleveland is proud to be part of the STAR team.
All participants receive one or the other drug for five years.
Breast cancer risk is based on age, family history of the disease, and personal medical history. Every woman considering STAR will have her risk of breast cancer assessed by a computerized program that will show how her risk compares to other women her age.