Hi Ian,
thanks for your post. I have looked at your questionnaire and it does not really seem to ask questions that relate to what you are trying to do. If you want to get demographic data like that you are asking then ask any national physiotherapy association. They, and many registration boards, ask the type of questions you are asking on a yearly basis. Perhaps that would be your fastest route to this information at a larger level.
On a partient support front, I would suggest using various web keyword analysis tools to find out what the public are searching for in relation to health. This will give you your answer for what the patient is looking for. You see you need to ask them, not us!
On a physio support forum, well that's what we do. So please don't ask for that type of advice from this forum as really we would view that as a direct conflict and fragmentation of what we are trying to make a collective environment. There is already to much fragmentation and not enough collaboration.
Might I ask if you are yourself a physiotherapist?
best of luck and I hope the above comments assist your search. 8o