While developing the new guidelines for diagnosis of dementia in PD, the MDS task force conducted a comprehensive and systematic review of studies in this area.2 The task force examined dementia over the course of PD, including its epidemiology; its effects on different aspects of cognition; its behavioural and psychiatric symptoms; and its relationship to motor and other non-motor symptoms.2

References:
1. Poewe W, Gauthier S, Aarsland D, et al. Diagnosis and management of Parkinson’s disease dementia. Int J Clin Pract 2008; 62 (10): 1581–1587.

2. Emre M, Aarsland D, Brown R, et al. Clinical diagnostic criteria for dementia associated with Parkinson’s disease. Mov Disord 2007; 22 (12): 1689–1707.

3. Dubois B, Burn D, Goetz C, et al. Diagnostic procedures for Parkinson’s disease dementia: recommendations from the Movement Disorder Society task force. Mov Disord 2007; 22 (16): 2314–2324.