Hi Tom, it sounds a realy interesting project, it'll be interesting to see the results.
Couple of comments-can't help noticing you're using the terms "prevalence" and "incidence," from experience, take care when performing your write up. It sounds like you're focussing on robust outcome measures, rather than unreliable proxy outcome measures- I should imagine there are many in the field of back pain.
Also, out of interest, what is your research question?
Last edited by gingernut; 23rd Nov 2011 at 21:05.