四川和重庆地区大中学生男男性接触者HIV感染状况及其相关危险性行为调查

A cross-sectional study of HIV infections and HIV-related risky sexual behaviour among male students who have sex with men（MSM） in Chongqing and Sichuan

摘要:

目的：了解我国四川和重庆地区在校大中学生男男性接触者（men who have sex with men，MSM）的艾滋病病毒（human immunodeficiency virus，HIV）感染状态、艾滋病相关危险性行为、最近6个月多性伴（性伴数≥2个）行为的影响因素。方法：在重庆和四川采用非概率抽样，共招募200名在校大中学生参与问卷调查和现场HIV检测。采用频率描述HIV感染率，采用Lo－gistic回归模型分析最近6个月多性伴行为（性伴数≥2个）的影响因素。结果：本研究共回收调查问卷200份，有效问卷193份（96.50%）。HIV抗体阳性检出率为8.29%，在读学校是中学（高中/中专/职高）、大专、大学本科及以上的HIV阳性检出率分别为17.95%、8.33%、5.08%；户口是农村的和在此之前未做过HIV检测阳性检出率分别为12.70%、11.11%。最近1个月内82.47%（127人）发生插入性行为时未每次使用安全套；最近6个月内51.81%（100人）有多性伴行为（性伴数≥2个）。多因素logistic回归显示最近6个月内多性伴行为（性伴数≥2个）的独立因素有：在读学校是大专（OR=4.270，P=0.0083）、在读学校是大学及以上（OR=3.523，P=0.0043）、最近6个月通过互联网寻找男性性伴（OR=5.622，P<0.0001）、最近1个月内无保护插入式性行为（OR=2.255，P=0.0201）。结论：我国四川和重庆地区大中学生MSM的HIV感染率高，尤其是中学生MSM和农村户口的学生MSM的HIV感染率高，同时四川和重庆地区大中学生MSM危险性行为发生率高，多性伴行为普遍，应及时开展科学适用的干预方式，遏制艾滋病毒在学生MSM中的流行。

Abstract:

Objective：To assess the prevalence of human immunodeficiency virus（HIV），risky sexual behaviors and the influencing factors of multiple sex partners（≥2 partners） in last 6 months among male students who have sex with men（MSM） in Chongqing and Sichuan. Methods：We adopted non-probability sampling method to recruited students MSM，and 200 students MSM were recruited to finish the survey and field HIV testing. Frequency was used to analyze the prevalence of HIV and logistic regression was used to analyze the influencing factors of multiple sex partners（≥2 partners） in last 6 months among student MSM. Results：There were 200 questionnaires and 193（96.50%） valid questionnaires. HIV antibody positive rate was 8.29%，the HIV antibody posi－tive detection rate of student who studied at secondary school（including high school，technical secondary school and professional high school），junior college and university and above were 17.95%，8.33% and 5.08%，respectively. The HIV antibody positive detection rate whose registered permanent residence was rural and not-receiving HIV testing were 12.70% and 11.11%，respectively. In the last month，82.47%（127 persons） did not use condom ev－ery time when they had sexual intercourse. In the last 6 months，51.81%（100 persons） had multiple sexual partners（≥2 partners）. Logistic regression showed that contributing factors of multiple sex partners（≥2 partners） in last 6 months were student who studied at junior college（OR=4.270，P=0.0083），student who studied at University and above（OR=3.523，P=0.0043），having male sex partner via internet in last 6 months（OR=5.622，P<0.0001），and having unprotected sex intercourse in last 1 month（OR=2.255，P=0.0201）. Conclusion：In Chongqing and Sichuan，the prevalence of HIV infection among secondary school and college students MSM is high，especially among secondary school students MSM and students whose registered permanent residence is rural. And also in Chongqing and Sichuan，high-risk sexual behavior and having had multiple sex partners are still commonly seen among students MSM students. Interventions are needed to prevent HIV transmission in this population．