title: Incidence of dementia according to DSM-III-R and ICD-10: results of the Leipzig Longitudinal Study of the Aged (LEILA75+), Part 2.
abstract: BACKGROUND
  The impact of different case definitions on incidence rates remains unclear.
  
  
  OBJECTIVE
  To compare incidence rates of dementia according to DSM-III-R and ICD-10.
  
  
  METHODS
  A two-wave community study was conducted (n=1692, age 75+ years follow-up period 1.6 years). Cognitive function was assessed by the Structured Interview for Diagnosis of Dementia of Alzheimer Type, Multiinfarct Dementia and Dementia of other Aetiology according to ICD-10 and DSM-III-R (SIDAM).
  
  
  RESULTS
  The annual incidence rate for dementia by applying different case definitions was found to be quite similar (DSM-III-R: 47.4 (95% CI=36.1-61.2) per 1000 person-years; ICD-10: 45.8 (95% CI=35.0-59.0) per 1000 person-years). Age-specific incidence rates increase steeply with age.
  
  
  CONCLUSIONS
  The impact of different case definitions on incidence rates of dementia appears limited if case definitions and case-finding procedures at baseline and follow-up are applied consistently.
authors.affiliation: Department of Psychiatry, University of Leipzig, Germany. ries@medizin.uni-leipzig.de
authors.forename: S G
authors.initials: SG
authors.lastname: Riedel-Heller
authors.forename: A
authors.initials: A
authors.lastname: Busse
authors.forename: C
authors.initials: C
authors.lastname: Aurich
authors.forename: H
authors.initials: H
authors.lastname: Matschinger
authors.forename: M C
authors.initials: MC
authors.lastname: Angermeyer
mesh_terms: D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D003704:Dementia / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008137:Longitudinal Studies; D008297:Male; D011569:Psychiatric Status Rating Scales; D017678:Sex Distribution