title: Examination of the Lille Apathy Rating Scale in Parkinson disease.
abstract: Apathy is a unique, multidimensional syndrome commonly encountered in patients with Parkinson disease (PD). Recently, the Lille Apathy Rating Scale (LARS), a semistructured interview yielding a global score, and composite subscores for different domains of apathy (i.e., cognitive, behavioral, affective, self awareness), was developed and given to a sample of patients with PD in France. This study is the first outside of its original developers to examine the English language version of the LARS in PD. We found the LARS to be a coherent instrument demonstrating both convergent and divergent validity, as compared to the Apathy Scale (AS) and Beck Depression Inventory (BDI-II). Using a receiver operating characteristic (ROC) analysis comparing the LARS to the AS, a validated and widely-used measure, we identified a cut-off score (sensitivity = 64%, specificity = 92%, PPV = 88%, NPV = 75%) that was higher than that proposed by the original authors, who derived their cut-off by comparing LARS global scores to clinical judgments of apathy. Although the present study does not compare the LARS to a diagnostic gold standard or promote its utility for diagnosing apathy, it provides further support for the LARS as a promising instrument to examine apathy in PD.
authors.affiliation: Department of Clinical & Health Psychology, University of Florida, Gainesville, Florida 32610-0165, USA. lzahodne@phhp.ufl.edu
authors.forename: Laura B
authors.initials: LB
authors.lastname: Zahodne
authors.forename: Shamar
authors.initials: S
authors.lastname: Young
authors.forename: Lindsey
authors.initials: L
authors.lastname: Kirsch-Darrow
authors.forename: Anne
authors.initials: A
authors.lastname: Nisenzon
authors.forename: Hubert H
authors.initials: HH
authors.lastname: Fernandez
authors.forename: Michael S
authors.initials: MS
authors.lastname: Okun
authors.forename: Dawn
authors.initials: D
authors.lastname: Bowers
mesh_terms: D000328:Adult; D000339:Affect / Q000502:physiology; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D003863:Depression / Q000175:diagnosis / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019964:Mood Disorders / Q000175:diagnosis* / Q000209:etiology; D010300:Parkinson Disease / Q000150:complications / Q000523:psychology*; D011569:Psychiatric Status Rating Scales; D012372:ROC Curve; D015203:Reproducibility of Results