Abstract:Background:Flare in osteoarthritis (OA) of the knee and hip (KHOA) is an important outcome for patients’ daily life and clinical research. A definition of a flare was set, and a core set of domains was recently endorsed by OMERACT/OARSI. No patient reported outcome (PRO) yet focusses on flare in OA specifically.Objectives:To develop a self-reporting instrument measuring flare in 5 languages, using qualitative methods and international Delphi consensus.Methods:We generated items using a dual-language (English a… Show more
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