A Global Study to Assess the Effects of Osimertinib in Participants With EGFRm Stage IA2-IA3 NSCLC Following Complete Tumour Resection

This is a Phase III, double-blind, randomised, placebo-controlled, 2-arm, international study assessing the efficacy and safety of adjuvant osimertinib versus placebo in participants with stage IA2-IA3 EGFRm Non-Small Cell Lung Cancer, who have previously undergone complete tumour resection. All participants must have had a tumour which harbours one of the 2 common EGFR mutations known to be associated with EGFR-TKI sensitivity (Ex19del, L858R). Eligible participants will be randomised in a 1:1 ratio to one of the 2 intervention arms: osimertinib 80 mg or matching placebo, once daily for 3 years unless discontinuation criteria is met.