Estrogen therapy not beneficial for secondary prevention of coronary heart disease

Data from the HERS-II trial on the incidence of coronary heart disease events (death or nonfatal myocardial infarction) in 2763 postmenopausal women with a prior history of myocardial infarction or interventional procedure who were treated with combined HRT or placebo. There was no difference between the two groups. The curves are truncated at year 7 when less than half of the cohort remained in follow-up.