A previous study found that only 49 percent of patients took aromatase inhibitors "at the full duration at the optimal schedule," Gallicchio said. "That means 51 percent did not."
The current research was partially funded by pharmaceutical company Astra Zeneca.
A final study, this time by researchers at Yale University, found that exercising for at least 150 minutes a week reduces the odds of developing endometrial cancer by 34 percent.
The benefit was greater for slim women, who had a 73 percent reduced risk compared with heavy, sedentary women. But even overweight and obese women who exercised had a 52 percent reduced risk compared to their counterparts who didn't exercise.
The U.S. National Cancer Institute has more on breast cancer.
SOURCE: Nov. 9, 2010 teleconference with Anne Weaver, graduate student, University at Buffalo and research apprentice, Roswell Park Cancer Institute; Konstantinos Tsilidis, Ph.D., postdoctoral fellow, Cancer Epidemiology Unit, University of Oxford; and Lisa Gallicchio, Ph.D., epidemiologist, The Prevention and Research Center, Mercy Medical Center, Baltimore; study abstracts.
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