title: Linkage of Alzheimer's disease to chromosome 21 and chromosome 19 markers: effect of age of onset assumptions.
abstract: Age of onset heterogeneity in Alzheimer's disease families was modelled by allowing for different liability classes for affected individuals according to their age of onset when calculating lod scores to chromosome 21 and chromosome 19 markers. Linkage to chromosome 21 was supported in the Boston data set, and the method of age correction did not greatly change the lod scores when only affected individuals were analyzed. The location of a gene on chromosome 19 for late age of onset illness was affected by the assumptions about early onset individuals.
authors.affiliation: Clinical Neurogenetics Branch, National Institute of Mental Health, Bethesda, MD 20892.
authors.forename: L R
authors.initials: LR
authors.lastname: Goldin
authors.forename: E S
authors.initials: ES
authors.lastname: Gershon
mesh_terms: D000328:Adult; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000453:epidemiology / Q000235:genetics*; D002874:Chromosome Mapping; D002888:Chromosomes, Human, Pair 19; D002891:Chromosomes, Human, Pair 21; D008040:Genetic Linkage; D005819:Genetic Markers; D006801:Humans; D008875:Middle Aged
chemical_list: D005819:Genetic Markers