Overview Abatacept Post-marketing Clinical Study in Japan Status: Completed Trial end date: 2016-12-26 Target enrollment: Participant gender: Summary The purpose of this study is to compare the clinical efficacy including joint damage progression and safety of Abatacept plus Methotrexate (MTX) to placebo plus MTX. Phase: Phase 4 Details Lead Sponsor: Bristol-Myers SquibbCollaborator: Ono Pharmaceutical Co. LtdTreatments: AbataceptMethotrexate