Avelumab Versus Platinum-Based Doublet Chemotherapy as First-Line Treatment for Patients With High-Expression Programmed Death-Ligand 1–Positive Metastatic NSCLC: Primary Analysis From the Phase 3 JAVELIN Lung 100 Trial

Introduction: We report the primary analysis from JAVELIN Lung 100, a phase 3 trial comparing avelumab (anti⁠–programmed death-ligand 1 [PD-L1]) versus platinum-based doublet chemotherapy as first-line treatment for PD-L1–positive (+) advanced NSCLC. Methods: Adults with PD-L1+ (≥1% of tumor cells; PD-L1 immunohistochemistry 73-10 pharmDx), EGFR and ALK wild-type, previously untreated, stage IV NSCLC were randomized to avelumab 10 mg/kg every 2 weeks (Q2W), avelumab 10 mg/kg once weekly (QW) for 12 weeks and Q2W thereafter, or platinum-based doublet chemotherapy every 3 weeks. Primary end points were overall survival (OS) and progression-free survival (PFS) per independent review committee. The primary analysis population was patients with high-expression PD-L1+ tumors (≥80% of tumor cells). Results: A total of 1214 patients were randomized to avelumab Q2W (n = 366), avelumab QW (n = 322), or chemotherapy (n = 526). In the primary analysis population, hazard ratios (HRs) for OS and PFS with avelumab Q2W (n = 151) versus chemotherapy (n = 216) were 0.85 (95% confidence interval [CI]: 0.67–1.09; one-sided p = 0.1032; median OS, 20.1 versus 14.9 mo) and 0.71 (95% CI: 0.54–0.93; one-sided p = 0.0070; median PFS, 8.4 versus 5.6 mo), respectively. With avelumab QW (n = 130) versus chemotherapy (n = 129), HRs were 0.79 (95% CI: 0.59–1.07; one-sided p = 0.0630; median OS, 19.3 versus 15.3 mo) and 0.72 (95% CI: 0.52–0.98; one-sided p = 0.0196; median PFS, 7.5 versus 5.6 mo), respectively. No new safety signals were observed. Conclusions: Longer median OS and PFS were observed with avelumab versus platinum-based doublet chemotherapy in advanced NSCLC, but differences in OS and PFS were not statistically significant, and the trial did not meet its primary objective. ClinicalTrials.gov Identifier: NCT02576574.