title: Trajectory of cognitive decline as a predictor of psychosis in early Alzheimer disease in the cardiovascular health study.
abstract: OBJECTIVE
  To compare the trajectories of cognitive decline between groups with, and without, the later development of psychotic symptoms during Alzheimer disease (AD) or mild cognitive impairment (MCI).
  
  
  METHODS
  : The authors examined cognitive function in a new analysis of an existing data set, the Cardiovascular Health Study, an epidemiologic, longitudinal follow-up study. Our analyses examined 9 years of follow-up data.
  
  
  METHODS
  Community.
  
  
  METHODS
  The authors examined subjects who were without dementia at study entry, received a diagnosis of AD or MCI during follow-up, and had been rated on the Neuropsychiatric Inventory for the presence of psychosis; 362 participants for the modified Mini-Mental State Examination (3MS) analysis and 350 participants for the digit symbol substitution test (DSST) analysis had sufficient follow-up data and apolipoprotein-∊ (APOE) genotyping.
  
  
  METHODS
  The 3MS and DSST were administered annually and analyzed using mixed-effects models including APOE4 status.
  
  
  RESULTS
  : Mean 3MS and DSST scores did not differ between AD with psychosis (AD + P) and without psychosis groups at baseline. The 3MS and DSST scores decreased more rapidly in subjects who ultimately developed psychosis.
  
  
  CONCLUSIONS
  Individuals who ultimately develop psychosis have more rapid cognitive deterioration during the earliest phases of AD than individuals with AD not developing psychosis. The genetic and other neurobiologic factors leading to the expression of AD + P may exert their effects by acceleration of the neurodegenerative process.
authors.affiliation: Departments of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA.
authors.forename: James E
authors.initials: JE
authors.lastname: Emanuel
authors.forename: Oscar L
authors.initials: OL
authors.lastname: Lopez
authors.forename: Patricia R
authors.initials: PR
authors.lastname: Houck
authors.forename: James T
authors.initials: JT
authors.lastname: Becker
authors.forename: Elise A
authors.initials: EA
authors.lastname: Weamer
authors.forename: Mary Ann A
authors.initials: MA
authors.lastname: Demichele-Sweet
authors.forename: Lewis
authors.initials: L
authors.lastname: Kuller
authors.forename: Robert A
authors.initials: RA
authors.lastname: Sweet
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000150:complications / Q000523:psychology*; D016009:Chi-Square Distribution; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009483:Neuropsychological Tests; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000209:etiology / Q000523:psychology*; D013997:Time Factors
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