Favourable effect of a 'second hit' after 13 weeks in early RA non-responders: the Amsterdam COBRA treat-to-target randomized trial

Rheumatology (Oxford, England)(2022)

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摘要
Objective: The aim of this study was to investigate the effect of treat-to-target combination therapy with intensification at 13 weeks in early RA. Methods: Early RA patients were classified as being at high or low risk of worsening RA based on disease activity and prognostic factors. High risk patients received COBRA-light (prednisolone 30 mg/day tapered to 7.5 mg/day, MTX increasing to 25 mg/week), and low-risk patients received MTX monotherapy increasing to 25 mg/week. The primary outcome (target) was DAS44 < 1.6 or EULAR good response at 26 weeks. At 13 weeks, non-responders were randomized to (open-label) intensification [high-risk patients: prednisolone 60 mg/day tapered to 7.5 mg/day, addition of SSZ (2 g/day) and HCQ (400 mg/day); low-risk patients: prednisolone 30 mg/day tapered to 7.5 mg/day] or continuation. Results: In the high-risk group (n= 150), 110 patients (73%) reached the target at 13 weeks, and 9 dropped out. Non-responders were randomized to intensification (n = 15) or continuation (n= 16), and after 26 weeks, 12 (80%) vs 7 (44%) of these, respectively, reached the target [difference: 36%, (95% CI 2%, 71%); P= 0.04]. In the low-risk group (n = 40), 17 (43%) reached the target. Non-responders were randomized to intensification (n = 8) or continuation (n = 7); 4 vs 3, respectively, reached the target. Adverse event rates were higher in the high-risk group, and higher in the intensification subgroup of that group. Serious adverse events were rare. Protocol violations were frequent and mostly led to mitigation of actual treatment intensification. kConclusion: Initial combination therapy was very successful in high-risk RA, and early intensification was beneficial in patients not reaching the strict target. The low-risk group was too small for drawing conclusions. In routine practice, adherence to early intensification based on strict targets is difficult.
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关键词
RA,DMARDs,immunosuppressants,study design,epidemiology
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