There has been quite a bit of discussion about this on another group, and one of the key things that has come out of that is the incredible bias towards males on it, i.e. you can answer the questions the same way and get different answers if you put male, or female down. If this is truly a screening test for symptoms, then being male or female shouldn't actually come into it. Also, as commented, if NSAIDS don't do anything because your pain has gone well beyond that level, then that also is going to throw a negative. Perhaps a slight change in wording on that might help - like "have you ever had relief from NSAIDS". It isn't a good screening test though, and a real pity to have it on such a website.
