title: Responsiveness of four patient-reported outcome measures to assess physical function in patients with knee osteoarthritis: comments on the article by Mahler et al.
authors.affiliation: a School of Rehabilitation Science , McMaster University , Hamilton , ON , Canada.
authors.forename: P
authors.initials: P
authors.lastname: Stratford
authors.affiliation: b Holland Orthopaedic and Arthritic Centre , Toronto , ON , Canada.
authors.forename: D
authors.initials: D
authors.lastname: Kennedy
mesh_terms: D006801:Humans; D020370:Osteoarthritis, Knee; D017063:Outcome Assessment, Health Care; D000071066:Patient Reported Outcome Measures; D057566:Self Report