The presence and location of OA diagnosed by a medical professional was examined through a single question (‘Have you been diagnosed with osteoarthritis by a medical professional?’). In the questionnaire, the following definition of OA was given to participants ‘Osteoarthritis is the damage of the joint’s cartilage that might lead to symptoms such as pain, stiffness or swelling in the given joint and that might impact functioning in either sport, work or daily life’.