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. 2015 Mar 27;94(12):e684. doi: 10.1097/MD.0000000000000684

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Copyright © 2015 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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Survival curves in patients with liver cancer according to different age groups. A: Group I versus Group II, χ² = 2.243, P = 0.134; Group I versus Group III, χ² = 17.304, P < 0.001; Group I versus Group IV, χ² = 22.360, P < 0.001; Group II versus Group III, χ² = 5.474, P = 0.019; Group II versus Group IV, χ²=8.469, P = 0.004; Group III versus Group IV, χ² = 0.252, P = 0.616. (B) Group 1 versus Group 2, χ² = 26.990, P < 0.001.