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. 2017 Nov 7;9:352. doi: 10.3389/fnagi.2017.00352

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Copyright © 2017 Xu, Chen, Xu and Qin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Kaplan-Meier curves for overall survival in patients with glioblastoma between 2004 and 2013 according to registry site. Overall survival of patients with glioblastoma from the Northeast region was longer compared to the North Central, West and the South regions (medium survival 10, 8, 8, and 7 months respectively; P < 0.001). The 1-, 3-, and 5-year survival rates for patients from different regions were as follows: Northeast—43.3, 11.1, 5.3%; South—34.3, 9.0, 4.9%; North Central—36.7, 10.3, 5.1%; and West—37.6, 9.9, 5.6%, respectively. Kaplan-Meier analysis and with log-rank test were performed using the statistical software package SPSS version 22.