title: [Estimation of the reliability and validity of the short version of the 28-item Dementia Behavior Disturbance scale].
abstract: OBJECTIVE
  The aim of this study was to make a short version of the 28-item Dementia Behavior Disturbance (DBD) scale.
  
  
  METHODS
  The 28-item DBD was evaluated twice, with a mean interval of 1 year in 221 outpatients with dementia attending our institution (mean age, 78.3 years). First, 6 items which did not show substantial changes were excluded. Next, 4 items that were less frequent were excluded. After factor analysis, a new, 13-item short version of the DBD scale (DBD13) was developed.
  
  
  RESULTS
  The DBD13 showed high internal consistency (Cronbach's alpha=0.96). A high correlation was observed between the scores of the DBD13 and those of the Mini-Mental State Examination (r=-0.27, p<0.0001), Assessment of Daily Living (r=-0.307, p<0.0001), Instrumental Activities of Daily Living (r=-0.375, p<0.0001) and Zarit Burden Interview (r=-0.68, p<0.0001).
  
  
  CONCLUSIONS
  The DBD13 may be a useful and valid measure of the behavioral and psychological symptoms of dementia to evaluate response to care for patients with dementia.
authors.affiliation: National Center for Geriatrics and Gerontology, Department of Geriatric Medicine, Kyorin University School of Medicine, Japan.
authors.forename: Ayako
authors.initials: A
authors.lastname: Machida
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D003704:Dementia / Q000175:diagnosis* / Q000451:nursing / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D015203:Reproducibility of Results