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Study evaluates efficacy and safety of filgotinib to treat refractory rheumatoid arthritis

Study evaluates efficacy and safety of filgotinib to treat refractory rheumatoid arthritis Study evaluates efficacy and safety of filgotinib to treat refractory rheumatoid arthritis
Study evaluates efficacy and safety of filgotinib to treat refractory rheumatoid arthritis Study evaluates efficacy and safety of filgotinib to treat refractory rheumatoid arthritis

A subgroup analysis of the FINCH 2 study was carried to investigate the efficacy and safety of filgotinib (inhibitor of Janus kinase 1) in Japanese rheumatoid arthritis patients who have failed or were intolerant to one or more biologic DMARDs from the global FINCH 2 study.

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Key take away

In Japanese patients having active refractory rheumatoid arthritis refractory to biologic disease-modifying antirheumatic drugs (DMARDs) therapy, both doses of once-daily 200 mg filgotinib and 100 mg filgotinib were found to be effective and showed good tolerability.

Background

A subgroup analysis of the FINCH 2 study was carried to investigate the efficacy and safety of filgotinib (inhibitor of Janus kinase 1) in Japanese rheumatoid arthritis patients who have failed or were intolerant to one or more biologic DMARDs from the global FINCH 2 study.

Method

This study was carried out utilizing the predefined statistical analyses. The FINCH 2 study is a randomized, Phase 3, double-blind, placebo-controlled trial in adult rheumatoid arthritis patients with an unsatisfactory response to biological DMARDs. The randomized subjects were treated with once-daily 200 mg filgotinib, 100 mg filgotinib, or placebo on the background of conventional synthetic DMARDs for 24 weeks.

The primary outcome was the percentage of patients who attained an American College of Rheumatology (ACR) 20% improvement (ACR20) response at week 12. The secondary outcomes were: (i) Percentage of subjects who attained Disease Activity Score for 28 joint count using C-reactive protein (DAS28-CRP) ≤ 3.2 at week 12 (ii) Alterations from baseline at week 12 in the Health Assessment Questionnaire-Disability Index (HAQ-DI) score (iii) Percentage of patients who achieved DAS28-CRP < 2.6 at week 24 (or other time points) (iv) Alterations from baseline at week 12 (or other time points) in 36-Item Short-Form Health Survey (SF-36) Physical Component Summary (PCS) score and Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue score.

Result

Of 449 subjects recruited in the overall population, 40 subjects were recruited from Japan. At week 12, the ACR 20% response rates in the Japanese population for 200 mg filgotinib, 100 mg filgotinib, and placebo are shown in the following table:


Compared to placebo, filgotinib demonstrated a greater efficacy for all of the key secondary endpoints. Filgotinib displayed good tolerability, similar to the overall population.

Conclusion

Filgotinib is effective, well-tolerated, and yields satisfactory outcomes in rheumatoid arthritis patients. 

Source:

Modern Rheumatology

Article:

Efficacy and safety of filgotinib in Japanese patients with refractory rheumatoid arthritis: Subgroup analyses of a global Phase 3 study (FINCH 2)

Authors:

Tsutomu Takeuchi et al.

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