Study setting and participants
primary hip or knee OA, femoral head necrosis
SECONDARY
Patients with primary hip or knee OA, referred from primary care for an orthopedic assessment at Sahlgrenska University Hospital between October 2020 and February 2022, were asked to participate in the study. The following inclusion criteria were used: primary hip or knee OA and ability to understand written and spoken Swedish. Patients were excluded if they (a) had previously been assessed by an orthopedic surgeon for their hip or knee OA, (b) had secondary OA, i.e. femoral head necrosis, or (c) were referred to a specific orthopedic surgeon. Ethical approval was obtained (registration number 2020 − 01144) from the Swedish Ethical Review Authority prior to the initiation of the study. The trial is registered at Clinical Trials NCT04665908, registered 14/12/2020.