Validation of the Unified Parkinson's Disease Rating Scale (UPDRS) section I as a screening and diagnostic instrument for apathy in patients with Parkinson's disease
We examined the validity of the motivation/initiative item of the Unified Parkinson's Disease Rating Scale (UPDRS) section I as a screening and diagnostic measure for apathy in Parkinson's disease (PD). Fifty-eight patients with PD were evaluated with the UPDRS, the 14-item Apathy Scale (AS), and standardized rating scales of depression and cognitive impairment. Apathy was diagnosed using specific items of the AS together with proposed criteria for apathy. A score of 2 or more on the motivation/initiative item was adequate to screen for apathy, whereas a score of 4 had high diagnostic accuracy at the cost of unacceptable low sensitivity. (c) 2007 Elsevier Ltd. All rights reserved.
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UCL, Royal Free Hosp, Royal Free & Univ Coll Med Sch, Dept Clin Neurosci, London, England
UCL, Inst Neurol, London, EnglandUCL, Royal Free Hosp, Royal Free & Univ Coll Med Sch, Dept Clin Neurosci, London, England
Gallagher, D. A.
Lees, A. J.
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UCL, Inst Neurol, London, EnglandUCL, Royal Free Hosp, Royal Free & Univ Coll Med Sch, Dept Clin Neurosci, London, England
Lees, A. J.
Schrag, A.
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UCL, Royal Free Hosp, Royal Free & Univ Coll Med Sch, Dept Clin Neurosci, London, England
UCL, Inst Neurol, London, EnglandUCL, Royal Free Hosp, Royal Free & Univ Coll Med Sch, Dept Clin Neurosci, London, England