Outcome measurements
A short form of the Swedish version of the QPP questionnaire [The questionnaire was sent to each patient (either by post or as an online survey as decided by the patient) within a week of their visit to the orthopedic clinic. Up to four reminders (within three weeks) were sent by email/post and finally one reminder by phone. Improve IT (Halmstad, Sweden) distributed and administered the online survey questionnaire. The first author of the study (LG) sent the questionnaire by post.Demographic data including age, gender, civil status, country of birth and education level were collected at baseline to describe the study population.