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IMpower132 explored the safety and efficacy of atezolizumab plus pemetrexed and platinum‐based chemotherapy as first‐line treatment for advanced non‐small‐cell lung cancer (NSCLC). Key eligibility criteria for the phase 3, open‐label, IMpower132 study included age ≥18 y, histologically or cytologically confirmed advanced non‐squamous NSCLC per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, Eastern Cooperative Oncology Group performance status of 0/1, and no prior systemic treatment for stage IV NSCLC. Patients received atezolizumab (1200 mg) plus pemetrexed (500 mg/m 2 ) and cisplatin (75 mg/m 2 ) or carboplatin (area under the concentration curve, 6 mg/mL/min) (APP arm) or chemotherapy alone (PP arm). The co‐primary study endpoints were overall survival (OS) and investigator‐assessed progression‐free survival (PFS) per RECIST 1.1 in the intention‐to‐treat population. A subgroup analysis was conducted in Japanese patients. In the Japanese subgroup (n = 101), median OS was 30.8 (95% CI, 24.3 to not estimable) mo in the APP arm (n = 48) and 22.2 (95% CI, 15.7‐30.8) mo in the PP arm (n = 53; hazard ratio [HR], 0.63 [95% CI, 0.36‐1.14]). PFS was 12.8 (95% CI, 8.6‐16.6) mo in the APP arm vs 4.5 (95% CI, 4.1‐6.7) mo in the PP arm (HR, 0.33 [95% CI, 0.21‐0.58]). Grade 3/4 treatment‐related adverse events (TRAEs) occurred in 68.8% of APP arm patients and 44.2% of PP arm patients. Consistent with global study results, atezolizumab plus pemetrexed and platinum‐based chemotherapy improved efficacy and was well tolerated in Japanese patients with advanced NSCLC despite a higher incidence of grade 3/4 TRAEs.

IMpower132: Atezolizumab plus platinum‐based chemotherapy vs chemotherapy for advanced NSCLC in Japanese patients