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CMAJ • July 13, 1999; 161 (1)
© 1999 Canadian Medical Association or its licensors

Evidence
Études

Use of hormone replacement therapy among cardiac patients at a Canadian academic centre

Michelle R. Wise, MD, Donna E. Stewart, MD, Peter Liu, MD and Beth L. Abramson, MD

From the Divisions of Cardiology and Women's Health, The Toronto Hospital, Faculty of Medicine, University of Toronto, Toronto, Ont. Dr. Stewart holds the Lillian Love Chair of Women's Health, University of Toronto. Dr. Liu holds a Research Chair from the Heart and Stroke Foundation of Ontario.

Abstract

Background: Although hormone replacement therapy (HRT) is associated with a reduced risk of coronary artery disease (CAD), use of this treatment among postmenopausal women is not widespread. The authors sought to determine the extent of HRT use in a select population of women at high risk for CAD.

Methods: A cross-sectional survey was performed involving all consecutive post-menopausal women who attended a cardiology clinic in a Toronto teaching hospital between January 1996 and August 1997. A chart review was followed by a telephone interview with the patients or their physicians. The utilization rate of HRT was obtained. Predictors of HRT use were identified using a multivariate logistic regression model.

Results: A total of 80 women with risk factors for CAD, symptoms suspicious of CAD or definite CAD diagnosed after cardiac investigations were included in the survey. Information on HRT use or nonuse was documented in 17 (21%) of the charts. Of the 72 women for whom data on HRT were available 16 (22%) were currently using it, 41 (57%) were not, and 15 (21%) had used it in the past. Five women (7%) were receiving HRT but there was no chart documentation. On multivariate analysis, younger women were more likely than older women to use HRT (odds ratio 0.91, 95% confidence interval 0.22-0.96; p < 0.05). Coronary risk profile, CAD diagnosis and history of hysterectomy were not associated with HRT use. Of the 41 women who had never received HRT 10 (24%) had possible contraindications (e.g., breast cancer or deep vein thrombosis); the proportion was similar in the group of women who were current or past users of HRT (29%).

Interpretation: Documentation of HRT use in patient charts is lacking. Few women in the study who were at risk for CAD were currently using HRT. The data support the need for better adherence to optimal practices in the management of women at high risk for CAD.




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S. A. Grover
Estrogen replacement for women with cardiovascular disease: Why don't physicians and patients follow the guidelines?
Can. Med. Assoc. J., July 1, 1999; 161(1): 42 - 43.
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