Inclusion Criteria:  A clinical diagnosis of hip or knee OA Participated for three months in any of the programs between 2018-04-01 and 2020- 03-31 Reported pain at both baseline and at 3 months follow-up Adherence of ≥80%, i.e., ≥80% completed education videos, exercises and questionnaires offered in the digital program and participation in two out of three educational lessons and at least 10 of the 12 supervised group exercise sessions offered in the BOA.  Exclusion Criteria  None