title: Screening for frontotemporal dementias and Alzheimer's disease with the Philadelphia Brief Assessment of Cognition: a preliminary analysis.
abstract: BACKGROUND
  A neuropsychological screening instrument sensitive to neuropsychological deficits associated with Alzheimer's disease (AD) and patients with frontotemporal dementia (FTD) would be valuable for diagnostic evaluation.
  
  
  METHODS
  The Philadelphia Brief Assessment of Cognition (PBAC) assesses working memory/executive control, language, visuospatial operations, verbal/visual episodic memory, and behavior/social comportment and can be administered and scored in 15-20 min. Participants included 149 patients with AD and four groups of FTD patients - i.e., patients with a decline in social comportment, personality, and executive functioning (SOC/EXEC), semantic dementia (SemD), progressive nonfluent aphasia (PNFA), and corticobasal syndrome (CBS).
  
  
  RESULTS
  The total PBAC score correlated with the Mini-Mental State Examination. Between-group analysis of PBAC subscales and the results of logistic regression analyses produced substantial between-group differences, emphasizing the sensitivity of the test to differentiate dementia subtypes. AD patients were impaired on tests of episodic memory, SOC/EXEC patients were impaired on a measure of social comportment/behavioral disturbance, PNFA patients obtained low scores on tests of working memory/executive control, SemD patients obtained lower scores on language-mediated measures, and CBS patients were impaired on visuospatial/visual memory tests.
  
  
  CONCLUSIONS
  These data support the usefulness of the PBAC as a relatively brief screening test of overall dementia severity across a wide range of dementia patients.
authors.affiliation: New Jersey Institute for Successful Aging, University of Medicine and Dentistry of New Jersey, School of Osteopathic Medicine, Stratford, NJ 08084, USA. libondj@gmail.com
authors.forename: David J
authors.initials: DJ
authors.lastname: Libon
authors.forename: Lauren
authors.initials: L
authors.lastname: Massimo
authors.forename: Peachie
authors.initials: P
authors.lastname: Moore
authors.forename: H Branch
authors.initials: HB
authors.lastname: Coslett
authors.forename: Anjan
authors.initials: A
authors.lastname: Chatterjee
authors.forename: Geoffrey K
authors.initials: GK
authors.lastname: Aguirre
authors.forename: Aaron
authors.initials: A
authors.lastname: Rice
authors.forename: Luisa
authors.initials: L
authors.lastname: Vesely
authors.forename: Murray
authors.initials: M
authors.lastname: Grossman
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000175:diagnosis* / Q000453:epidemiology*; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology; D003072:Cognition Disorders / Q000175:diagnosis* / Q000453:epidemiology*; D003704:Dementia / Q000175:diagnosis* / Q000453:epidemiology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008403:Mass Screening / Q000379:methods*; D009483:Neuropsychological Tests; D015995:Prevalence; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed