We studied the impact of progestin dose on this risk. The pattern and number of days per month that progestin is given in postmenopausal combined hormone therapy appears to affect endometrial cancer risk. We assessed the impact of progestin dose on this risk.
Department of Obstetrics and Gynecology, Division of Public Health Sciences, University of Washington, 325 9th Avenue, Seattle, WA 98115, USA. reeds@u.washington.edu