The findings, reported in the Journal of Neurology, showed that people with Alzheimer's performed significantly worse than the other two groups.

BBC: Test improves Alzheimer diagnosis

The Alzheimer's prevention study published in today's issue of the Journal of the American Medical Association (JAMA) provides interesting clues as to how Alzheimer's might be prevented in women, but its results are less than ironclad.

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The second sentence is apparently a reference to another study, authored by researcher John Breitner and published in the Nov. 6 issue of the Journal of the American Medical Association, that indicated that estrogen replacement might help prevent Alzheimer's but also that there was a big time lag--about a decade--between taking the drugs and seeing any benefit.

FORBES: Magazine Article