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. 2020 Jan 13;9:1426. doi: 10.3389/fonc.2019.01426

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Copyright © 2020 Li, Weng, Zhong, Tang, Zhu, Cheng, Xu and Yuan.

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 the 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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Competing risks nomogram for predicting the 10-, 15-, and 20-year risk of developing second primary cancers. The competing risks nomogram provides a method to calculate 10-, 15-, and 10-year probability of cumulative incidence (CI) of developing second primary cancers (SPCs) on the basis of a patient's combination of covariates. To use, locate the patient's age at initial diagnosis, draw a line straight up to the points axis to establish the score associated with that age. Repeat for the other five covariates (race, histology, stage, HR, chemotherapy, and radiotherapy). Add the score of each covariate together and locate the total score on the total points axis. Draw a line straight down to the 10-, 15-, and 20-year SPCs cumulative incidence axis to obtain the individual probability.