ADAURA: Phase III, Double-blind, Randomized Study of Osimertinib Versus Placebo in EGFR Mutation-positive Early-stage NSCLC After Complete Surgical Resection

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Introduction:Currently, the role of epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors as adjuvant therapy for early-stage non–small-cell lung cancer after complete surgical tumor resection remains under investigation. We present the rationale and study design for the ADAURA ( identifier, NCT02511106) trial, a multicenter, double-blind, randomized, placebo-controlled study.Patients and Methods:Study entry will be limited to adults aged ≥ 18 years (and in Japan and Taiwan, age ≥ 20 years) with primary nonsquamous stage IB-IIIA non–small-cell lung cancer with central confirmation of an EGFR exon 19 deletion or L858R mutation. Patients will be randomized 1:1 to receive osimertinib 80 mg once daily or placebo once daily until disease recurrence, a treatment discontinuation criterion is met, or patients achieve the maximum treatment duration of 3 years. The primary endpoint of this study is disease-free survival. Secondary endpoints include the disease-free survival rate at 2, 3, and 5 years, overall survival, overall survival rate at 5 years, and safety and tolerability. Health-related quality of life and pharmacokinetics will also be evaluated. The exploratory objectives include assessment of osimertinib efficacy in patients with a confirmed baseline T790M mutation status and postrecurrence outcomes, health resource use, and a comparison of plasma-derived circulating tumor DNA EGFR mutation status at baseline and at disease recurrence.Results:Study enrollment began in August 2015, and results are expected in the third quarter of 2021 (depending on the actual event rate).

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