title: Assessment of radiographs in longitudinal observational studies.
abstract: Radiographs are important to assess structural damage in longitudinal studies. This article describes several issues on the selection of films, frequency of followup, scoring of radiographs, and presentation of results, especially in the context of longitudinal studies.
authors.affiliation: Department of Internal Medicine, University Hospital Maastricht, Maastricht, The Netherlands.
authors.forename: Désirée M F M
authors.initials: DM
authors.lastname: van der Heijde
mesh_terms: D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging* / Q000503:physiopathology; D018450:Disease Progression; D006801:Humans; D008137:Longitudinal Studies; D017063:Outcome Assessment, Health Care; D011859:Radiography / Q000379:methods*; D012720:Severity of Illness Index