Development of a risk estimation model for condomless sex among college students in Zhuhai, China: a cross-sectional study.

"Declarations Ethics approval and consent to participateAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Ethics Committee of the Zhuhai Centre for Disease Control and Prevention. Participants were assured of the confidentiality and anonymity. Informed consent was obtained from all individual participants included in the study. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported by Department of Education of Guangdong Province (2022KTSCX060, 2022SFKC074), Guangdong Office of Philosophy and Social Science (GD21YSH08) and the National Natural Science Foundation of China under Grant (81703282)."