Efficacy and Safety of Sarilumab and Adalimumab Monotherapy in Patients With Rheumatoid Arthritis (SARIL-RA-MONARCH)

A Randomized, Double-blind, Parallel-group Study Assessing the Efficacy and Safety of Sarilumab Monotherapy Versus Adalimumab Monotherapy in Patients With Rheumatoid Arthritis

Primary Objective:

To demonstrate that sarilumab monotherapy was superior to adalimumab monotherapy with respect to signs and symptoms as assessed by disease activity score 28 (DAS28)-erythrocyte sedimentation rate (ESR) in participants with active rheumatoid arthritis (RA) who were either intolerant of, or considered inappropriate candidates for continued treatment with methotrexate (MTX), or after at least 12 weeks of continued treatment with MTX, were determined to be inadequate responders.

Secondary Objectives:

To demonstrate that sarilumab monotherapy was superior to adalimumab monotherapy in participants with active RA who were either intolerant of, or considered inappropriate candidates for continued treatment with MTX, or after at least 12 weeks of continued treatment with MTX, were determined to be inadequate responders, with respect to:

• Reduction of signs and symptoms of RA.
• Improvement in quality of life assessed by participant reported outcome questionnaires.

Assessment of the safety and tolerability of sarilumab monotherapy (including immunogenicity) throughout the study.

Total study duration was up to 310 weeks: Up to a 4 week screening period, 24 week randomized double-blind treatment phase, 276-week open-label extension, and 6 weeks post-treatment final study visit.

Inclusion criteria:

• Diagnosis of RA greater than or equal to (>=)3 months duration.
• American College of Rheumatology (ACR) Class I-III functional status.
• Active RA was defined as:

At least 6 of 66 swollen joints and 8 of 68 tender joints, high sensitivity C-reactive protein (hs-CRP) >=8 mg/L or ESR >=28 millimeter per hour (mm/H), and DAS28-ESR greater than (>) 5.1.

• Participants as per Investigator judgment were either intolerant of, or considered inappropriate candidates for continued treatment with MTX, or after at least 12 weeks of continued treatment with MTX, or inadequate responders treated with an adequate MTX dose for at least 12 weeks.

Exclusion criteria:

• Age <18 years or the legal age of consent in the country of the study site, whichever was higher.
• Current treatment with disease-modifying antirheumatic drug (DMARDs)/immunosuppressive agents including MTX, cyclosporine, mycophenolate, tacrolimus, gold, penicillamine, sulfasalazine or hydroxychloroquine within 2 weeks prior to the baseline (Randomization Visit) or azathioprine, cyclophosphamide within 12 weeks prior to baseline (Randomization Visit) or leflunomide within 8 weeks prior to the Randomization Visit, or 4 weeks after cholestyramine washout.
• Treatment with any prior biologic agent, including anti-interleukin 6 (IL-6), IL-6 receptor (IL-6R) antagonists, and prior treatment with a Janus kinase inhibitor.
• Use of parenteral corticosteroids or intra-articular corticosteroids within 4 weeks prior to screening.

The above information was not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.