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. 2016 Jun 13;7(32):51598–51607. doi: 10.18632/oncotarget.9956

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Copyright: © 2016 Liu et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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The crude a. and adjusted b. relationship between tumor size and the log-relative risk of death. An inflection of tumor size fixed at 5 cm that gave the maximum likelihood in the 2-piecewise linear regression model (crude P = 0.032, adjusted P = 0.007, respectively). The log-relative risk of death increased linearly with tumor numbers if no covariates were adjusted (OR = 1.1, P < 0.001) c. No significant association was observed between tumor number and the relative risk of death after adjusting for tumor size and other covariates (OR = 1.0, P = 0.615) d.