Hi Lanier, >> I had heard a figure of 1 in 300 for people over 65. Can anyone else confirm what numbers we have heard before. << I thought it was as follows: 2 out of every 100 persons above 65 have PD 1 out of every 350 - 500 persons in general population. The variation (350 - 500) is a result from different methods of counting (and the accuracy and reliability of them) in various countries. Hans.