Table 2 Criteria for inclusion or exclusion

• Males and females 45 years or older

• Activity-related hip and/or knee pain/complaints

AND

• Clinical signs and symptoms corresponding to hip and/or knee OA

OR

radiologically diagnosed OA

OR

registered in the medical journal with the ICPC codes L89 (osteoarthritis of the hip), L90 (osteoarthritis of knee), and/or L91 Osteoarthritis (not classified elsewhere).

• Total hip or knee replacement in the actual joint(s) and no pain/complaints in the other hip or knee joint(s)

• Inflammatory rheumatic diseases (e.g. rheumatoid arthritis, spondyloarthritis)

• Malignant illness or other major conditions (i.e. unstable cardiovascular disorders or lung disease, dementia) that restrict the ability to adhere to the recommended OA treatment

• Do not understand the Norwegian language