RT Journal Article SR Electronic T1 Outcome variables for osteoarthritis clinical trials: The OMERACT-OARSI set of responder criteria. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1648 OP 1654 VO 30 IS 7 A1 Pham, Thao A1 Van Der Heijde, Désirée A1 Lassere, Marissa A1 Altman, Roy D A1 Anderson, Jennifer J A1 Bellamy, Nicholas A1 Hochberg, Marc A1 Simon, Lee A1 Strand, Vibeke A1 Woodworth, Thasia A1 Dougados, Maxime A1 OMERACT-OARSI YR 2003 UL http://www.jrheum.org/content/30/7/1648.abstract AB Improvement in analysis and reporting results of osteoarthritis (OA) clinical trials has been recently obtained because of harmonization and standardization of the selection of outcome variables (OMERACT 3 and OARSI). Moreover, OARSI has recently proposed the OARSI responder criteria.This composite index permits presentation of results of symptom modifying clinical trials in OA based on individual patient responses (responder yes/no). The 2 organizations (OMERACT and OARSI) established a task force aimed at evaluating: (1) the variability of observed placebo and active treatment effects using the OARSI responder criteria; and (2) the possibility of proposing a simplified set of criteria. The conclusions of the task force were presented and discussed during the OMERACT 6 conference, where a simplified set of responder criteria (OMERACT-OARSI set of criteria) was proposed.