I'm trying to track down a questionnaire which originated with the International Federation of Medical Students' Associations. It was used in a couple of studies but the original seems to have vanished from the IFMSA website.
Reference
International Federation of Medical Students’ Association (IFMSA). Influence of studying on student’s Health (ISSH). Questionnaire. From www.issh-ifmsa.org. Accessed June 2007 (link now dead)