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  • Sundström, Anna, 1969-, et al. (författare)
  • APOE influences on neurosychological function after mild head injury : within-person comparisons
  • 2004
  • Ingår i: Neurology. - Minneapolis, Minn : Lancet Publications Inc.. - 0028-3878 .- 1526-632X. ; 62:11, s. 1963-1966
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To examine the relationship between neuropsychological outcome following mild head injury (MHI) and APOE genotype. Methods: Data from a population-based longitudinal study (n = 3,500) were used to identify 34 adults who experienced MHI during the course of the study. Their pre- and postinjury performances on a battery of nine neuropsychological tests were compared within person, and the postinjury performance was compared with that of age- and gender-matched control subjects. Results: The within-person comparisons showed that participants with at least oneAPOE ε4 allele (n = 11) had a significantly decreased postinjury performance on three of the tests, whereas the postinjury performance for APOE ε4-negative participants (n = 23) was unchanged. There was no significant difference in postinjury performance between participants with/without the ε4 allele, and neither group was impaired relative to controls. Conclusions: APOE genotype may influence the outcome following an MHI. Pre/postinjury within-person comparisons seem more sensitive than control group comparisons for detecting injury-related effects.
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  • Sundström, Anna, 1969-, et al. (författare)
  • Increased risk of dementia following mild head injury for carriers but not for non-carriers of the APOE ε4 allele
  • 2007
  • Ingår i: International psychogeriatrics. - New York : Springer. - 1041-6102 .- 1741-203X. ; 19:1, s. 159-165
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The ε4 allele of apolipoprotein E (APOE) and head injury are risk factors for dementia diseases, and may act synergistically to further increase the risk. The aim of this study was to examine the association between mild head injury, APOE and dementia.Methods: Data were obtained from the Betula prospective population-based study of aging, memory, and health. The study included 543 participants in the age range 40–85 years, free of dementia at baseline, who were followed up within a 5-year interval. Dementia was classified using DSM-IV criteria. Information on previous head injury was obtained through screening of the participants' answers to health questionnaires at baseline and at follow-up.Results: Subjects with head injury but without APOE ε4 had no increased risk of dementia. Subjects with APOE ε4 had an increased risk and those with both APOE ε4 and head injury had the highest risk of dementia (odds ratio = 5.2).Conclusions: APOE ε4 constitutes a risk factor for dementia, mild injury in isolation does not increase the risk, but head injury in combination with the APOE ε4 leads to increased risk of dementia.
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