Abstract
BACKGROUND: This prospective, observational study evaluated the real-world safety of osimertinib in a broad Chinese population with non-small cell lung cancer (NSCLC). METHODS: Chinese NSCLC patients who received osimertinib were enrolled and followed up for 12 months. The primary endpoint was the incidence of adverse drug reactions (ADRs). RESULTS: From 20 April 2020 to 1 August 2022, 1,700 patients were enrolled from 30 centers, with 706 (41.5%) patients ≥65 years old. Osimertinib was administered as first-line, second-line, third/later-line and adjuvant therapy in 44.9%, 34.2%, 14.3% and 4.5% of the patients, respectively. ADRs, adverse events (AEs), Grade ≥3 AEs, and serious AEs were reported in 627 (36.9%), 959 (56.4%), 165 (9.7%), and 102 (6.0%) patients, respectively. AEs of special interests occurred in 59 (3.5%) patients, with 41 (2.4%) and 19 (1.1%) reporting QTc prolongation and interstitial lung disease/pneumonitis-like events, respectively. The safety profiles in patients ≥65 years old and those usually not included in randomized clinical trials were similar to that in the total population. CONCLUSION: This largest real-world safety study of osimertinib in China demonstrated that osimertinib was well-tolerated in a broad NSCLC population, including patients usually not included in randomized clinical trials, without new safety signals identified. CLINICAL TRIAL REGISTRATION: NCT03485326 (www.clinicaltrials.gov).