title: Screening for DSM-IV-TR cognitive disorder NOS in Parkinson's disease using the Mattis Dementia Rating Scale.
abstract: OBJECTIVE
  This study explores the utility of the Mattis Dementia Rating Scale (MDRS) as a screening tool for the Diagnostic and Statistical Manual for Mental Disorders 4th edition (DSM-IV-TR) diagnosis cognitive disorder not otherwise specified (NOS) in Parkinson's disease (PD).
  
  
  METHODS
  A total of 125 individuals with PD were diagnosed using DSM-IV-TR criteria for cognitive disorder NOS and dementia. Receiver operating characteristics (ROC) tested the discriminant validity of the MDRS, with the clinician's diagnosis serving as the gold standard.
  
  
  RESULTS
  The MDRS ROC curve to discriminate subjects with cognitive disorder NOS from non-demented subjects had an area under the curve of 0.59 (standard error = 0.08, 95% CI: 0.43-0.74).
  
  
  CONCLUSIONS
  The MDRS is not effective for identifying PD patients with cognitive disorder NOS without dementia.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA. gponton1@jhmi.edu
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Pontone
authors.forename: Justin
authors.initials: J
authors.lastname: Palanci
authors.forename: James R
authors.initials: JR
authors.lastname: Williams
authors.forename: Susan Spear
authors.initials: SS
authors.lastname: Bassett
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D003072:Cognition Disorders / Q000175:diagnosis*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000523:psychology*; D011569:Psychiatric Status Rating Scales