hospitalisation. No major depression in last 6 months (Beck score >16). Not currently taking medication known to affect CNS 2003 USA 20 No Clinically No clinical dementia N = 20; male = diagnosed PD (DSM-III) or history 100%; age = 72; of substance or DUR = 9 head injury. Male and right-handed Miller 2011, UK Cohort 104 No IPD (PDBB H&Y 3 at N = 104; age = 72; ≤ 2008 criteria) assessment. No DUR = 7 comorbid conditions likely to affect communication. No DBS or SLT treatment. Native English speaking. Monetta 2008 Canada 14 No IPD (Calne criteria) No dementia (Mattis N = 14; age = 66 other serious medical conditions or history of substance or alcohol abuse Pell 2014 Canada 15 No Clinically No dementia (Mattis N = 15; male = diagnosed PD scale), other 53%, age = 71; neurological DUR = 11 conditions, major psychiatric
hospitalisation. No major depression in last 6 months (Beck score >16). Not currently taking medication known to affect CNS 2003 USA 20 No Clinically diagnosed PD No clinical dementia (DSM-III) or history of substance or head injury. Male and right-handed N = 20; male = 100%; age = 72; DUR = 9 Miller 2011, 2008 UK Cohort 104 No IPD (PDBB criteria) H&Y ≤ 3 at assessment. No comorbid conditions likely to affect communication. No DBS or SLT treatment. Native English speaking. N = 104; age = 72; DUR = 7 Monetta 2008 Canada 14 No IPD (Calne criteria) No dementia (Mattis other serious medical conditions or history of substance or alcohol abuse N = 14; age = 66 Pell 2014 Canada 15 No Clinically diagnosed PD No dementia (Mattis scale), other neurological conditions, major psychiatric N = 15; male = 53%, age = 71; DUR = 11
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