Real-world assessment of treatment effectiveness in patients with advanced non-small cell lung cancer (aNSCLC) with MET exon 14 skipping (METex14).

e21112 Background: Capmatinib is approved for patients (pts) with advanced stage (a)NSCLC harboring METex14. However, there is limited data on capmatinib activity in comparison to other approved therapies. We assessed real-world (rw) clinical outcomes of pts with aNSCLC with METex14 who initiated treatment with capmatinib, immunotherapy (IO), or chemotherapy (CT) regimens. Methods: In a retrospective chart review, data were abstracted by a sample of oncologists invited nation-wide in the US who randomly selected prespecified numbers of charts, with larger sampling targets for capmatinib and IO therapies. Eligible pts were aged ≥18 years, had stage ≥IIIB NSCLC and METex14; received first-line (1L) systemic therapy after 1 January 2017 with follow up of ≥6 months after starting 1L therapy (except death) as of the data abstraction date; and did not receive MET inhibitors other than capmatinib. Clinical outcomes included best overall real world response rate (rwORR), progression-free survival (rwPFS), overall survival (OS), and time to treatment discontinuation (TTD). RwORR was assessed using rw-RECIST guided by RECIST 1.1 criteria or physician documentation. All measures were descriptively analyzed. Time-to-event outcomes were assessed per line of therapy via Kaplan-Meier methods. Results: In total, 287 eligible pts were identified. Median age was 63.3 years, 71% were male, 41% were non-White, and 49.5% were treated in community settings. 15 pts had brain metastasis at diagnosis. Pts who received 1L capmatinib had higher rwORR and longer rwPFS, OS, and TTD than pts who received 1L IO mono or CT alone or in combination (Table 1). Pts treated with second-line (2L) capmatinib had higher rwORR than other treatments but was a smaller pt population. Conclusions: Our analysis suggests that capmatinib in aNSCLC with METex14 yields numerically better clinical outcomes than IO or CT alone or in combination. These findings support use of capmatinib in this setting and may inform clinical decision making in routine practice. [Table: see text]