TY - JOUR T1 - Course of patient-reported health outcomes in rheumatoid arthritis: comparison of longitudinal and cross-sectional approaches. JF - The Journal of Rheumatology JO - J Rheumatol SP - 228 LP - 233 VL - 33 IS - 2 AU - Ines Rupp AU - Hendriek C Boshuizen AU - Leo D Roorda AU - Huibert J Dinant AU - Catharina E Jacobi AU - Geertrudis van den Bos Y1 - 2006/02/01 UR - http://www.jrheum.org/content/33/2/228.abstract N2 - OBJECTIVE: To describe health outcomes reported by patients with rheumatoid arthritis (RA), i.e., pain, disability and health-related quality of life, as a function of disease duration in a longitudinal approach, and to compare the course of patient-reported health outcomes by a longitudinal versus a cross-sectional approach. METHODS: Data were collected with 4 series of questionnaires between 1997 and 2002 among patients with RA (maximum number = 882) of varying disease duration. The course of patient-reported health outcomes as a function of disease duration was evaluated using both longitudinal data and cross-sectional data of the first series. RESULTS: The course of RA shows a different pattern for various health outcomes. We observed similar trends in health outcomes in this large patient sample using the longitudinal and the cross-sectional approach. CONCLUSION: Although longterm consequences of RA are preferably assessed in longer duration followup studies, cross-sectional studies, including patients with a broad range of disease durations, seem to provide fairly reliable estimates of the course of health outcomes. ER -