• Désirée van der Heijde, Ferdinand C Breedveld, Arthur Kavanaugh, Edward C Keystone, Robert Landewé, Kaushik Patra, and Aileen L Pangan.
• Leiden University Medical Center, Leiden, The Netherlands.
• J Rheumatol. 2010 Nov 1; 37 (11): 2237-46.

ObjectiveTo evaluate the efficacy and safety of initial combination treatment with adalimumab (ADA) and methotrexate (MTX) versus monotherapy with ADA or MTX during an open-label extension of PREMIER.MethodsPatients with early rheumatoid arthritis (RA) received blinded ADA plus MTX, ADA alone, or MTX alone for 2 years in PREMIER. At Year 2, patients could enroll in an open-label extension and receive ADA monotherapy; MTX could be added at the investigator's discretion. Longterm efficacy results are presented as observed data.ResultsIn the open-label period, 497 of the original 799 randomized patients had ≥ 1 dose of ADA (by original randomization: ADA plus MTX, n = 183; ADA, n = 159; MTX, n = 155). In the completers cohort [patients with available Year-5 ACR responses and modified total Sharp scores (mTSS)], the Year-5 mean change from baseline in mTSS for the ADA+MTX arm (n = 124) was 2.9, compared with 8.7 and 9.7 in the ADA (n = 115) and MTX (n = 115) arms. Comprehensive disease remission, defined as the combination of DAS28 remission, normal function (Health Assessment Questionnaire ≤ 0.5), and radiographic nonprogression (ΔmTSS ≤ 0.5), was achieved by more patients in the initial ADA+MTX arm (35%) than in the ADA (13%) or MTX (14%) arms.ConclusionInitial combination treatment with ADA plus MTX, followed by open-label ADA, led to better longterm clinical, functional, and radiographic outcomes than either initial ADA or MTX monotherapy during 5 years of treatment.

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