hi all i thought it interesting that there is a european definition and an american definition - makes for tricky discussions! numbers are not definite as in pd in general but i've read that dementia in pd occurs in from 10% to 33% of all pd cases [an aside: as compared to clinical depression = 40% to 60%] another tough fact to absorb but absorb it we must if all parkies are to have a voice when we gain an opportunity to raise awareness about pd let's remember those who are silent janet janet paterson 52 now / 41 dx / 37 onset snail-mail: PO Box 171 Almonte Ontario K0A 1A0 Canada website: a new voice <http://www.geocities.com/SoHo/Village/6263/> e-mail: <[log in to unmask]>