Journal
NEUROCASE
Volume 11, Issue 1, Pages 3-7Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/13554790490903038
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Funding
- NIA NIH HHS [P01AG09466, P01AG14449, R01 AG1589, P30 AG10161] Funding Source: Medline
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Possession of one or more copies of the apolipoprotein E (APOE) epsilon4 allele is a known risk factor for Alzheimer's disease (AD), but it is uncertain whether the epsilon4 allele is associated with disease incidence among persons with mild cognitive impairment (MCI). We addressed this issue with data from the Religious Orders Study. Participants were 181 older Catholic clergy members who met criteria for MCI based on a uniform structured clinical evaluation; 56 (30.9%) had at least one epsilon4 allele. Clinical evaluations, which included clinical classification of dementia and AD, were repeated annually. During a mean of 5.7 years of observation, 79 persons (43.6%) developed AD. In a proportional hazards model that controlled for age, sex, and education, possession of an epsilon4 allele was associated with a 93% increase in the risk of developing Alzheimer's disease (95% CI: 1.02, 2.63). There was a marginally significant reduction in the effect of epsilon4 in older compared to younger participants (p=.053). The results suggest that possession of an epsilon4 allele does increase risk of AD in persons with MCI.
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