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Hormone replacement therapy and stroke: risk, protection or no effect?
1Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA 90089-9175, USA. annlia@juno.com
Maturitas
|May 19, 2001
Summary
Hormone replacement therapy (HRT) does not appear to increase stroke risk in women. Some evidence suggests estrogen may reduce fatal stroke risk, but more research is needed for optimal use.
Area of Science:
- Neurology
- Endocrinology
- Epidemiology
Background:
- Stroke is a leading cause of death and disability, particularly for women.
- Primary prevention is crucial for stroke control.
- Estrogen's potential role in reducing stroke risk is under investigation.
Purpose of the Study:
- To review epidemiologic studies on the association between hormone replacement therapy (HRT) and stroke.
- To evaluate the evidence for HRT's effect on stroke morbidity and mortality.
Main Methods:
- Systematic review of 29 epidemiologic studies published over 25 years.
- Analysis of studies evaluating hormone replacement therapy (HRT) and stroke outcomes.
Main Results:
- No conclusive evidence of a beneficial effect of HRT on stroke risk was found.
- The majority of evidence suggests HRT does not increase stroke risk.
- Some studies indicate a moderately reduced risk of fatal stroke with estrogen use, but optimal parameters are unclear.
Conclusions:
- Inconsistencies in study designs may explain unclear relationships.
- Estrogen might prevent fatal stroke or improve survival, warranting further investigation.
- Ongoing randomized clinical trials are expected to clarify HRT's impact on stroke.