RT Journal Article T1 A Randomized, Placebo-Controlled Trial of Pembrolizumab Plus Chemotherapy in Patients With Metastatic Squamous NSCLC: Protocol-Specified Final Analysis of KEYNOTE-407. A1 Paz-Ares, Luis A1 Vicente, David A1 Tafreshi, Ali A1 Robinson, Andrew A1 Soto Parra, Hector A1 Mazières, Julien A1 Hermes, Barbara A1 Cicin, Irfan A1 Medgyasszay, Balazs A1 Rodríguez-Cid, Jerónimo A1 Okamoto, Isamu A1 Lee, SungSook A1 Ramlau, Rodryg A1 Vladimirov, Vladimir A1 Cheng, Ying A1 Deng, Xuan A1 Zhang, Ying A1 Bas, Tuba A1 Piperdi, Bilal A1 Halmos, Balazs K1 Chemotherapy K1 PD-L1 K1 Pembrolizumab K1 Squamous non–small-cell lung cancer AB In the randomized KEYNOTE-407 study (ClinicalTrials.gov, NCT02775435), pembrolizumab plus carboplatin and paclitaxel/nab-paclitaxel (chemotherapy) significantly improved overall survival (OS) and progression-free survival (PFS) compared with placebo plus chemotherapy in patients with previously untreated metastatic squamous NSCLC. We report updated efficacy outcomes from the protocol-specified final analysis and, for the first time, progression on next line of treatment. Eligible patients were randomized to chemotherapy plus either pembrolizumab (n = 278) or placebo (n = 281). After positive results from the second interim analysis, patients still receiving placebo could cross over to pembrolizumab monotherapy at the time of confirmed progressive disease. The primary end points were OS and PFS. PFS-2 (time from randomization to progression on next-line treatment/death, whichever occurred first) was an exploratory end point. After median (range) follow-up of 14.3 (0.1-31.3) months, pembrolizumab plus chemotherapy continued to exhibit a clinically meaningful improvement over placebo plus chemotherapy in OS (median, 17.1 mo [95% confidence interval (CI): 14.4‒19.9] versus 11.6 mo [95% CI: 10.1‒13.7]; hazard ratio [HR], 0.71 [95% CI: 0.58‒0.88]) and PFS (median, 8.0 mo [95% CI: 6.3‒8.4] versus 5.1 mo [95% CI: 4.3‒6.0]; HR, 0.57 [95% CI: 0.47‒0.69]). PFS-2 was longer for patients randomized to first-line pembrolizumab plus chemotherapy (HR, 0.59 [95% CI: 0.49‒0.72]). Grade 3 to 5 adverse events occurred in 74.1% and 69.6% of patients receiving pembrolizumab plus chemotherapy and placebo plus chemotherapy, respectively. Pembrolizumab plus chemotherapy continued to exhibit substantially improved OS and PFS in patients with metastatic squamous NSCLC. The PFS-2 outcomes support pembrolizumab plus chemotherapy as a standard first-line treatment in patients with metastatic squamous NSCLC. YR 2020 FD 2020-06-26 LK http://hdl.handle.net/10668/15844 UL http://hdl.handle.net/10668/15844 LA en DS RISalud RD Apr 6, 2025