title: Development of the Korean version of Alzheimer's Disease Assessment Scale (ADAS-K).
abstract: OBJECTIVE
  The purpose of this study was the development of the Korean Version of Alzheimer's Disease Assessment Scale (ADAS-K).
  
  
  METHODS
  ADAS-K was administrated to 84 AD patients as well as 105 non-demented control subjects. Three aspects of reliability were tested. To evaluate the validity of ADAS-K, discriminant validity and concurrent validity were tested. To evaluate the sensitivity of ADAS-K to disease severity, all subjects, AD patients and control subjects, were grouped by CDR scale and their mean scores on ADAS-K were compared.
  
  
  RESULTS
  ADAS-K demonstrated high levels of reliability. Mean ADAS-K scores for AD patients were significantly different from the control group (p < 0.01). Furthermore, ADAS-K exhibited significant correlations with other tests and scales (range 0.45-0.85, p < 0.01). In ROC curve analysis, ADAS-K displayed high diagnostic efficacy and the optimal cut-off point was selected between 18/19. ADAS-K was able to discriminate the degree of AD severity according to CDR classification. Our results suggested that ADAS-K-cog was sensitive to very mild AD.
  
  
  CONCLUSIONS
  We demonstrated that ADAS-K is a reliable and valid instrument not only for AD diagnosis but also for evaluation of its severity.
authors.affiliation: Department of Neuropsychiatry, Seoul National University, College of Medicine and Seoul National University Hospital, Seoul, Korea.
authors.forename: J C
authors.initials: JC
authors.lastname: Youn
authors.forename: D Y
authors.initials: DY
authors.lastname: Lee
authors.forename: K W
authors.initials: KW
authors.lastname: Kim
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: J H
authors.initials: JH
authors.lastname: Jhoo
authors.forename: K U
authors.initials: KU
authors.lastname: Lee
authors.forename: J
authors.initials: J
authors.lastname: Ha
authors.forename: J I
authors.initials: JI
authors.lastname: Woo
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D014175:Translating