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. 2016 Sep 2;95(35):e4551. doi: 10.1097/MD.0000000000004551

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Copyright © 2016 the Author(s). Published by Wolters Kluwer Health, Inc. All rights reserved.

This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0, where it is permissible to download, share and reproduce the work in any medium, provided it is properly cited. The work cannot be changed in any way or used commercially. http://creativecommons.org/licenses/by-nc-nd/4.0

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Kaplan–Meier analyses of overall survival and time to progression according to the longest diameter of tumors after propensity score matching. PEIT was similar to RFA in overall survival both in (A) patients with the longest diameter of tumors ≤1.5 cm (P = 0.149) and in (B) patients with the longest diameter of tumors >1.5 and ≤3.0 cm group (P = 0.850). In terms of time to progression, RFA had not significantly longer time to progression than PEIT in (C) patients with the longest diameter of tumors ≤1.5 cm (P = 0.474) but had significantly longer time to progression in (D) patients with the longest diameter of tumors >1.5 and ≤3.0 cm group (P = 0.007).