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. 2020 Aug;12(8):4347–4356. doi: 10.21037/jtd-20-2137

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2020 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Age at diagnosis as an independent prognostic factor by multivariate Cox regression analysis. The associations of clinical characteristics and therapy with OS were analyzed using multivariate analysis. The forest plots indicate the independent prognostic effects of age at diagnosis and other clinical variables on OS. *, P<0.05. OS, overall survival; HR, hazard ratio; CI, confidence interval; SCC, squamous cell carcinoma; RT, simple radiotherapy; sCRT, sequential chemoradiotherapy; cCRT, concurrent chemoradiotherapy.