Efficacy and Safety of Brigatinib Compared With Crizotinib in Asian vs. Non-Asian Patients With Locally Advanced or Metastatic ALK–Inhibitor-Naive ALK+ Non–Small Cell Lung Cancer: Final Results From the Phase III ALTA-1L Study
Myung‐Ju Ahn, Hye Ryun Kim, James Chih‐Hsin Yang, Ji-Yu Han, Jacky Yu-Chung. Li, Maximilian J. Hochmair, Gee-Chen Chang, Angelo Delmonte, Ki Hyeong Lee, Rosario García Campelo, Cesare Gridelli, Alexander I. Spira, Raffaele Califano, Frank Griesinger, Sharmistha Ghosh, Enriqueta Felip, Dong‐Wan Kim, Yuyin Liu, Pingkuan Zhang, Sanjay Popat, D. Ross Camidge
Abstract
BACKGROUND: Brigatinib is a next-generation anaplastic lymphoma kinase (ALK) inhibitor with demonstrated efficacy in locally advanced and metastatic non-small cell lung cancer (NSCLC) in crizotinib-refractory and ALK inhibitor-naive settings. This analysis assessed brigatinib in Asian vs. non-Asian patients from the first-line ALTA-1L trial. PATIENTS AND METHODS: This was a subgroup analysis from the phase III ALTA-1L trial of brigatinib vs. crizotinib in ALK inhibitor-naive ALK+ NSCLC. The primary endpoint was progression-free survival (PFS) as assessed by blinded independent review committee (BIRC). Secondary endpoints included confirmed objective response rate (ORR) and overall survival (OS) in the overall population and BIRC-assessed intracranial ORR and PFS in patients with brain metastases. RESULTS: Of the 275 randomized patients, 108 were Asian. Brigatinib showed consistent superiority in BIRC-assessed PFS vs. crizotinib in Asian (hazard ratio [HR]: 0.35 [95% CI: 0.20-0.59]; log-rank P = .0001; median 24.0 vs. 11.1 months) and non-Asian (HR: 0.56 [95% CI: 0.38-0.84]; log-rank P = .0041; median 24.7 vs. 9.4 months) patients. Results were consistent with investigator-assessed PFS and BIRC-assessed intracranial PFS. Brigatinib was well tolerated. Toxicity profiles and dose modification rates were similar between Asian and non-Asian patients. CONCLUSION: Efficacy with brigatinib was consistently better than with crizotinib in Asian and non-Asian patients with locally advanced or metastatic ALK inhibitor-naive ALK-+ NSCLC. There were no clinically notable differences in overall safety in Asian vs. non-Asian patients.