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. 2019 Oct 1;97(4):194–201. doi: 10.4174/astr.2019.97.4.194

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Copyright © 2019, the Korean Surgical Society

Annals of Surgical Treatment and Research is an Open Access Journal. All articles are 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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Table 5. Multivariate analysis.

CI, confidence interval.