Does Pain Medication Use Influence the Outcome of 8 Weeks of Education and Exercise Therapy in Patients with Knee or Hip Osteoarthritis? An Observational Study.

" : Conflicts of interest: E.M.R. and S.T.S. are developers of the Good Life with osteoArthritis in Denmark (GLA: D) programme, a not-for profit initiative to implement clinical guidelines in primary care. E.M.R. is deputy editor of Osteoarthritis and Cartilage, the developer of Knee injury and Osteoarthritis Outcome Score (KOOS) and several other freely available patient-reported outcome measures. S.T.S. is an Associate Editor of Journal of Orthopedic & Sports Physical Therapy and has received grants from The Lundbeck Foundation, personal fees from Munksgaard, all of which are outside the submitted work. S.T.S. also report to currently be funded by a grant from Region Zealand (Exercise First) and a grant from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 801790). JBT holds a research grant from Pfizer outside the submitted work. B.K., A.C., and D.T.G. declare no conflict of interest.: Funding sources: The Danish Physiotherapist Association’s fund for research, education and practice development; the Danish Rheumatism Association; and the Physiotherapy Practice Foundation supported the start-up phase of GLA: D®."

" : Conflicts of interest: E.M.R. and S.T.S. are developers of the Good Life with osteoArthritis in Denmark (GLA: D) programme, a not-for profit initiative to implement clinical guidelines in primary care. E.M.R. is deputy editor of Osteoarthritis and Cartilage, the developer of Knee injury and Osteoarthritis Outcome Score (KOOS) and several other freely available patient-reported outcome measures. S.T.S. is an Associate Editor of Journal of Orthopedic & Sports Physical Therapy and has received grants from The Lundbeck Foundation, personal fees from Munksgaard, all of which are outside the submitted work. S.T.S. also report to currently be funded by a grant from Region Zealand (Exercise First) and a grant from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 801790). JBT holds a research grant from Pfizer outside the submitted work. B.K., A.C., and D.T.G. declare no conflict of interest.: Funding sources: The Danish Physiotherapist Association’s fund for research, education and practice development; the Danish Rheumatism Association; and the Physiotherapy Practice Foundation supported the start-up phase of GLA: D®."