Trial reportJournal of neurology2026
Clinical effectiveness of efgartigimod in a broad population of patients with generalized myasthenia gravis: subgroup analyses from a randomized, double‑blind, placebo‑controlled, phase 3 trial (ADAPT).
Trial report in Journal of neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03669588 (A Randomized, Double-Blind, Placebo-Controlled, Multicenter Phase 3 Trial to Evaluate the Efficacy, Safety and Tolerability of ARGX-113 in Patients With Myasthenia Gravis Having Generalized Muscle Weakness), which is not on this map. Not yet cited in PubMed.
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A Randomized, Double-Blind, Placebo-Controlled, Multicenter Phase 3 Trial to Evaluate the Efficacy, Safety and Tolerability of ARGX-113 in Patients With Myasthenia Gravis Having Generalized Muscle Weakness
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11 authors.
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Abstract
backgroundThe ADAPT phase 3 trial (NCT03669588) showed efgartigimod was well tolerated and efficacious in acetylcholine receptor antibody-positive (AChR-Ab +) patients with generalized myasthenia gravis (gMG). This analysis utilized data from the ADAPT trial to investigate the efficacy and safety of efgartigimod in different patient subgroups.
methodsADAPT included a broad population of AChR-Ab + participants who received a stable dose of ≥ 1 (any) treatment for gMG and were randomized 1:1 to efgartigimod (10 mg/kg) or placebo (administered as four once-weekly infusions per cycle) for 26 weeks. Myasthenia Gravis Activities of Daily Living (MG-ADL) and Quantitative Myasthenia Gravis (QMG) responder rates in cycles 1 and 2, and rates of treatment-emergent adverse events (TEAEs) were analyzed in the following patient subgroups: history of nonsteroidal immunosuppressive treatment (NSIST), concomitant use of gMG treatments throughout the study, and baseline patient and disease characteristics, including time since diagnosis, age, baseline MG-ADL score, body mass index (BMI), sex, and prior thymectomy.
resultsIn total, 129 AChR-Ab + participants were included (efgartigimod, n = 65; placebo, n = 64). Across all subgroups, higher MG-ADL and QMG responder rates were observed in participants treated with efgartigimod versus placebo during cycles 1 and 2. Rates of TEAEs were similar between participants treated with efgartigimod and placebo, regardless of concomitant gMG treatment type.
conclusionSimilar to outcomes observed in the ADAPT overall population, efgartigimod was well tolerated and efficacious across a broad range of patients, regardless of NSIST treatment history, concomitant use of gMG treatments, or baseline patient and disease characteristics.
trial registrationClinicalTrials.gov: NCT03669588 (registered September 13, 2018).
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