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  • Title: Estrogen therapy and risk of cognitive decline: results from the Women's Estrogen for Stroke Trial (WEST).
    Author: Viscoli CM, Brass LM, Kernan WN, Sarrel PM, Suissa S, Horwitz RI.
    Journal: Am J Obstet Gynecol; 2005 Feb; 192(2):387-93. PubMed ID: 15695976.
    Abstract:
    OBJECTIVE: This study was undertaken to assess whether estrogen therapy (ET) reduces the risk of cognitive decline in women with cerebrovascular disease. STUDY DESIGN: We conducted a randomized, double-blind trial of estradiol 17beta versus placebo for secondary stroke prevention in 664 postmenopausal women with a recent stroke or transient ischemic attack. The Mini-Mental State Examination (MMSE) and 5 domain measures were obtained at baseline and exit. RESULTS: Among 461 women withdrawn alive without stroke, ET did not have a significant effect on cognitive measures after an average of 3 years (relative risk of MMSE decline: 0.74, 95% CI, 0.49-1.13). In women with normal MMSE at entry, estrogen was associated with less decline (relative risk, 0.46, 95% CI, 0.24-0.87). CONCLUSION: In this study, estradiol did not have significant effects on cognitive measures. However, in women with normal function at baseline, there may be a benefit for ET in reducing the risk for cognitive decline.
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