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. 2021 Apr 16;11:661040. doi: 10.3389/fonc.2021.661040

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Copyright © 2021 Zhu, Hao, Ma, Shi, Wang, Yan, Chen, Xu, Jiang, Zhang and Li

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) and the ]copyright owner(s) are credited and that he 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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Construction of nomogram and calibration diagram. (A) Nomogram incorporating CEA, CA199, CA125, and LODDS for predicting the OS of CRC patients. (B, C) Three-year calibration and five-year calibration diagram for assessment of the nomogram. In the nomogram, total points were obtained by summing up individual points from the respective variables, and higher points indicate poorer survival. In the calibration diagram, the nearer distance of red or blue dots to the diagonal line, the more accurate is the prediction of the nomogram. CEA, carcinoembryonic antigen; CA199, carbohydrate antigen199; CA125, carbohydrate antigen125; LODDS, log odds of positive lymph nodes scheme; OS, overall survival; CRC, colorectal cancer.