Hi Dennis, Marling, Phil, Nita, et al [who's Al ?]; I goofed. I should never have equated 'median' and 'average'. I think I even knew better at the time. I certainly know better now, having looked up both terms in my dictionary. Maybe instead of 'median', I meant to say 'medium' or 'close to middling'. The clarification that Nita was looking for in re 'ages' seems a tad murky. But maybe this is a fair indication of the status of statistics in re PD in general anyway. Irregardless, the stereotypical image of a Parkie in the eye and mind of Josephina Public needs to be changed, howsomever we tackle the job and scrunch the numbers. Just your average cyber-sibling Janet diagnosis at age 41 onset of symptoms at age 37 [log in to unmask]