American Journal of Epidemiology Vol. 124, No. 2: 268-274
Copyright © 1986 by The Johns Hopkins University School of Hygiene and Public Health
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CORRELATES OF CHANGE IN POSTMENOPAUSAL ESTROGEN USE IN A POPULATION-BASED STUDY
1 School of Nursing, San Diego State University San Diego, CA
2 Division of Epidemiology, Department of Comunity and Family Medicine, University of California San Diego, La Jolla, CA
Reprint requests to Dr. Michael H. Criqui, Division of Epidemiology, Department of Community and Family Medicine, M-007, University of California, San Diego, La Jolla, CA 92093
During the late 1970s, there was a dramatic reduction in postmenopausal estrogen use in the United States, which may have reflected concern over a well-publicized postmenopausal estrogen-endometrial cancer link. The authors studied 310 postmenopausal women in a defined population over the period 1974–1981 to evaluate whether hysterectomy and certain other characteristics predicted change in postmenopausal estrogen use status during this period and, as a secondary issue, whether women who subsequently began postmenopausal estrogen use had different characteristics prior to use, an important question in the evaluation of the relation of postmenopausal estrogen use to morbidity and mortality from cancer, cardiovascular disease, or other diseases in observational studies. The only strong predictor of whether postrnenopausal estrogen use would be discontinued was the presence of an intactuterus. Women who discontinued postmenopausal estrogen use were also some what older and heavier than those who continued, but were otherwise quite similar on a wide range of variables, including risk factors for and the presence of various chronic diseases. Similarly, the absence of a uterus was the only strpredictor of the initiation of postmenopausal estrogen use. Thus, concern about a possible postmenopausal estrogen-endometrlal cancer link appeared to have been the major determinant of change in postmenopausal estrogen use in this time period. In the secondary analysis, variables other than hysterectomy did not discriminate between women who initiated postmenopausal estrogen use versus those who did not report use of postmenopausal estrogens, suggesting that a broad range of other characteristics was not a priori different in these two groups.
chronic disease; endometrium; estrogen; hysterectomy; neoplasms
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