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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Overall survival (OS) of all patients with stage IV non-small cell lung carcinoma (NSCLC) in cohort A vs. D: (a) all patients treated and untreated; (b) treated patients only; (c) untreated patients only; (d) patients < 70 years; (e) patients ≥ 70 years. CI, confidence interval.