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. 2022 Nov 2;24(11):e38855. doi: 10.2196/38855

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©Ke Yun, Jiaming Yu, Changyang Liu, Xinxin Zhang. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 02.11.2022.

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 https://www.jmir.org/, as well as this copyright and license information must be included.

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Cost-effectiveness analysis flowchart of the mobile phone–based digital intervention. MSM: men who have sex with men; STI: sexually transmitted infection.