Detailed study characteristics First Year Country Design Sizeb Diagnostic Other inclusion Participant author criteria for PD criteria characteristics funded Alpert 1990 USA 10 No IPD (H&Y 3-4) Mild-to-moderate N = 10; male = dementia. No 80%; Mean age = psychiatric 77 years; mean conditions or disease duration substance abuse (DUR) = 6 years Ash 2011 USA 14a No PD (Hughes No other causes of N = 14; male = criteria) dementia 71%; Mean age = 73; DUR = 7 Barnish 2013 UK 45 No IPD (PDBB No clinical evidence N = 45; male = criteria) of dementia or 62%; age = 71, previous serious DUR = 7 (median) medical conditions that affect cognition or speech. Judged by clinics to be suitable for the study Coates 1997 UK 48 Clinically No severe N = 48; male = diagnosed IPD intercurrent illness 42%; age = 70; or clinical evidence DUR = 7 of dementia 2008, USA 25 No PD (H&Y1-4) Aged between 18 N = 25; male = 2005 and 90. No history 56%; age =70 of neurologic, psychiatric or language deficit. MMSE Not ≥23.
Detailed study characteristics First author Year Country Design Sizeb funded Diagnostic criteria for PD Other inclusion criteria Participant characteristics Alpert 1990 USA 10 No IPD (H&Y 3-4) Mild-to-moderate dementia. No psychiatric conditions or substance abuse N = 10; male = 80%; Mean age = 77 years; mean disease duration (DUR) = 6 years Ash 2011 USA 14a No PD (Hughes criteria) No other causes of dementia N = 14; male = 71%; Mean age = 73; DUR = 7 Barnish 2013 UK 45 No IPD (PDBB criteria) No clinical evidence of dementia or previous serious medical conditions that affect cognition or speech. Judged by clinics to be suitable for the study N = 45; male = 62%; age = 71, DUR = 7 (median) Coates 1997 UK 48 Clinically diagnosed IPD No severe intercurrent illness or clinical evidence of dementia N = 48; male = 42%; age = 70; DUR = 7 2008, 2005 USA 25 No PD (H&Y1-4) Aged between 18 and 90. No history of neurologic, psychiatric or language deficit. MMSE ≥23. Not N = 25; male = 56%; age =70
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