Patients with osteoarthritis or rheumatoid arthritis have similar severity of pain and functional disability when compared according to the same patient questionnaire measure: data from 1979-2019

Purpose: To review evidence that disease burden in osteoarthritis (OA) is similar to rheumatoid arthritis (RA) in studies between 1979 and 2019, in which the same patient questionnaire measure was used to assess patients with OA or RA, and to analyze some possible reasons for underestimation of OA by the rheumatology community and general public. Methods: All published studies found in the medical literature between 1979 and 2019 were analyzed...