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. 2014 Mar 13;9:74. doi: 10.1186/1748-717X-9-74

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Copyright © 2014 Castillo et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Kaplan-Meier curves for pre-treatment SUV₉₅. Time to radiation pneumonitis symptoms is compared among subsets of patients within observed terciles of SUV₉₅ (SUV₉₅ < 0.99, 0.99 ≤ SUV₉₅ < 1.2, SUV₉₅ ≥ 1.2). Right-censored observations are marked by +. The hazard ratios (HR) and corresponding 95% confidence intervals for comparing between the (2nd and 1st) terciles; and (3rd and 1st) terciles follow as 2.25 (1.12, 4.52) and 2.39 (1.19, 4.82), respectively. Median time to symptoms for patients with SUV₉₅ ≥ 0.99 was 101 days.