title: Apolipoprotein E4 allele frequency in Spanish Alzheimer and control cases.
abstract: We have found an APOE epsilon 4 allelic frequency of 0.289 (95% CI 0.195-0.383) in Spanish AD patients (n = 88; average age = 71.2 +/- 9.37) and of 0.061 (95% CI 0.023-0.099) in age-matched controls (n = 147; average age = 71.5 +/- 10.29). Remarkably no ApoE 4/4 subjects were observed in any of the age-matched control groups compared to a total of 22 AD patients with the ApoE 4/4 phenotype. The combined odds ratio for subjects with one or two epsilon 4 alleles in the present study is 6.25 (95% CI 3.13-12.60), which is one of the highest so far reported. Altogether our results suggest a trans-European difference in the ApoE epsilon 4 frequency but no differences in the strength of the association between APOE4 and AD.
authors.affiliation: Human Genome and Molecular Genetics Research Group, Faculty of Medicine, University of Barcelona, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Adroer
authors.forename: P
authors.initials: P
authors.lastname: Santacruz
authors.forename: R
authors.initials: R
authors.lastname: Blesa
authors.forename: S
authors.initials: S
authors.lastname: López-Pousa
authors.forename: C
authors.initials: C
authors.lastname: Ascaso
authors.forename: R
authors.initials: R
authors.lastname: Oliva
mesh_terms: D000328:Adult; D017668:Age of Onset; D000368:Aged; D000483:Alleles; D000544:Alzheimer Disease / Q000235:genetics / Q000378:metabolism*; D053327:Apolipoprotein E4; D001057:Apolipoproteins E / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D008297:Male; D010641:Phenotype; D013030:Spain
chemical_list: D053327:Apolipoprotein E4; D001057:Apolipoproteins E