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Insights From the Women's Health Initiative Memory Study

Lon S. Schneider, MD

JAMA. 2004;291:3005-3007.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Alzheimer disease (AD) increases exponentially with age, with an annual incidence of approximately 0.08% at age 60 to 64 years, and more than doubling every 5 years to an incidence of 0.7% at age 75 to 79 years and 1.4% at age 80 to 85 years.¹ Approximately 43% of people with AD are between 75 and 85 years.¹ A substantial number of observational studies have suggested that hormone therapy decreases incidence or delays onset of dementia, primarily AD.^2-7 Laboratory studies have shown that estrogen receptors are present on cholinergic neurons and have neurotropic, antioxidant, and anti-inflammatory effects.^8-9 Estrogen deficiency in middle age has been postulated to account, at least in part, for the somewhat higher incidence of AD in women than men and may constitute a risk factor for AD.

The Women's Health Initiative Memory Study (WHIMS), the estrogen-alone portion of which is reported in this . . . [Full Text of this Article]

Author Affiliations: Departments of Psychiatry and Behavioral Sciences, and Neurology, Keck School of Medicine, University of Southern California, Los Angeles.

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