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. 2019 Jun 18;21(6):e13475. doi: 10.2196/13475

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©Ke Yun, Junjie Xu, Sequoia Leuba, Yunyu Zhu, Jing Zhang, Zhenxing Chu, Wenqing Geng, Yongjun Jiang, Hong Shang. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 18.06.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Nomogram for incident HIV infection among men who have sex with men. To use the nomogram, the health official first determines and then sums the points of each variable located on the top point scale. Based on this sum, the health official uses the bottom point scale to determine the probability of HIV incidence. CIAI: condomless insertive anal intercourse; CRAI: condomless receptive anal intercourse.