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The British Journal of Psychiatry 140: 249-256 (1982)
© 1982 The Royal College of Psychiatrists

A study of familial factors in Alzheimer's disease

LJ Whalley, AD Carothers, S Collyer, R De Mey and A Frackiewicz

Data on the families of 74 probands with autopsy-proven Alzheimer's disease did not support the hypothesis, advanced by Heston and co- workers, of a familial association between Alzheimer's disease, Down's syndrome and immunoproliferative disorders. However, there are difficulties of interpreting negative conclusions in this type of study, particularly those resulting from small sample size and the impossibility of tracing all relatives; only the data for immunoproliferative disorders are incompatible with the hypothesis, those for Down's syndrome being too few to be informative. The incidence of presenile dementia among the first-degree relatives of probands was raised, as in many previous studies, and was consistent with a simple polygenic model. The mean parental age at birth of the probands was significantly raised by about 2 years (P divided by 0.01), but so also was that of their unaffected sibs, suggesting that the mechanism differs from that occurring in trisomy 21 and certain other aneuploidies.


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Copyright © 1982 The Royal College of Psychiatrists.