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Modern rheumatology · Jan 2021
Efficacy of add-on iguratimod in patients with rheumatoid arthritis who inadequately respond to either tocilizumab or tumor necrosis factor alpha inhibitors.
- Kyosuke Hattori, Yuji Hirano, Yasuhide Kanayama, Yosuke Hattori, Takefumi Kato, Nobunori Takahashi, Naoki Ishiguro, and Toshihisa Kojima.
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
- Mod Rheumatol. 2021 Jan 1; 31 (1): 80-87.
ObjectivesThis study aimed to evaluate the efficacy of add-on iguratimod (IGU) in patients with rheumatoid arthritis (RA patients) who inadequately respond to either tocilizumab (TCZ) or tumor necrosis factor alpha inhibitors (TNFi).MethodsTwenty-three RA patients treated with TCZ (the TCZ group) and 23 RA patients treated with TNFi (the TNFi group) were enrolled in this 24-week retrospective study from our multicenter registry. All inadequate responders to either TCZ or TNFi received add-on IGU. Baseline demographics and disease activity at 24 weeks after initiating add-on IGU were compared between the two groups.ResultsBaseline clinical disease activity index (CDAI) values in the TCZ group and TNFi group were 14.1 and 11.8 (p = .24 between the two groups). At 24 weeks, CDAI values in the TCZ group and TNFi group were 5.1 and 7.5 (p = .002 and .002 compared to baseline, respectively) and ΔCDAI values were -9.0 and -4.3 (p = .007 between the two groups). Multiple linear regression analysis revealed that add-on IGU in the TCZ group was associated with greater improvement in CDAI relative to the TNFi group.ConclusionAdd-on IGU was more effective in inadequate responders to TCZ than in inadequate responders to TNFi.
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