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. 2019 Mar 7;51(4):1449–1463. doi: 10.4143/crt.2018.688

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Copyright © 2019 by the Korean Cancer Association

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — Kaplan-Meier survival curves for the four radiotherapy techniques in the study population. Overall survival (OS) (A), progression-free survival (PFS) (B), locoregional relapse-free survival (LRFS) (C), and distant metastasis-free survival (DMFS) (D) compared across the entire cohort of stage II nasopharyngeal carcinoma patients. p-values were calculated using the unadjusted log-rank test. 2DCRT, two-dimensional conventional radiotherapy; CT-SIM, computed tomography simulator; 3DRT, three-dimensional conformal radiotherapy; IMRT, intensity-modulated radiotherapy.