Pembrolizumab in patients with advanced non-small-cell lung cancer (KEYNOTE-001): 3-year results from an open-label, phase 1 study

This study is registered at ClinicalTrials.gov, number NCT01295827, and is ongoing.FindingsBetween May 8, 2012 and July 13, 2014, 550 patients (101 treatment naive and 449 previously treated) were enrolled. Median follow-up was 34·5 months at data cutoff (Sept 1, 2016). At 36 months, investigator-assessed objective response according to immune-related response criteria was achieved for 41 of 101 treatment naive patients (41% [95% CI 30·9–50·8]; median duration of response was 16·7 months [95% CI 12·6–not reached]) and 102 of 449 previously treated patients (23% [18·9–26·9]; 33·3 ([22·5–not reached]). The Kaplan-Meier estimate of overall survival at 36 months was 26·4% (95% CI 14·3–40·1) for treatment naive patients and 19·0% (15·0–23·4) for previously treated patients, with median overall survival of 22·3 months (95% CI 17·1–31·5) and 10·5 months (8·6–13·2). PD-L1 tumour proportion score ≥50% was associated with longer median overall survival (95% CI) versus tumour proportion score 1–49% (treatment naive: 34·9 [20·3–not reached] vs 19·5 [10·7–26·3] months; previously treated: 15·4 [10·5–18·5] vs 8·5 [6·0–12·7] months). Grade 3–5 treatment-related adverse events occurred in 66 patients (12%), and 30 (6%) discontinued owing to a treatment-related adverse event. The most frequent grade 3–4 treatment-related adverse events were pneumonitis (10 [2%] of 550) and fatigue (5 [1%] of 550). Overall, 227 patients (41%) of 5...
Source: The Lancet Respiratory Medicine - Category: Respiratory Medicine Source Type: research