The Korean EGFR Registry is a prospective multicenter observational cohort study designed to enroll all stage EGFR-mutated non-small cell lung cancer (NSCLC) patients. However, due to the extended follow-up period required to confirm clinical outcomes, a retrospective cohort has been included. This retrospective cohort comprises patients with recurrent or metastatic NSCLC who began taking EGFR TKI after January 2021. The recruitment phase was planned to span 36 months, commencing in May 2022, with scheduled follow-up activities continuing until December 2026. The target enrollment for this study is set at 2,000 patients, with competitive enrollment to be carried out across 40 university hospitals in Korea.
