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Casual sex and concurrent sexual partnerships among young people from an Yi community with a high prevalence of HIV in China

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Asian Journal of Andrology 2012年第5期14卷 758-765页

作者： Yi Yang Rong-Sheng Luan Peng Liu Chun-Lin Wu Ying Zhou Wen Chen West China Medical School of Public Health Sichuan UniversityChengdu 610041China Chengdu University of Traditional Chinese Medicine Chengdu 611137China

Liangshan Prefecture in Sichuan province, China, has a high prevalence of HIV infection, which is reflective of a change in the mode of transmission from injection drug use （IDU） to heterosexual intercourse. However, few studies focus on HIV-related heterosexual risk behaviours among the majority Yi population. The objectives of this study were to explore the characteristics of an egocentric sexual network and estimate the prevalence of casual sexual behaviour. Yi villagers （n= 108）, aged 15-35 years, who reported having had sex within the previous year were interviewed as to their sexual behaviours and networks. In-depth interviews and focus group discussions provided supplementary information on sexual norms. Logistic regression analysis was used to calculate unadjusted odds ratios （ORs） and 95% confidence intervals （CIs）. Most of the respondents reported having had casual sex at some time in their life, and 66.7% reported multiple sexual partnerships. Only 21.3% reported ever having used a condom. During the study year, a total of 137 partners were involved in 153 sexual partnerships. Among the reported sexual partnerships, 67.3% originated from a casual sexual relationship. For network members in components of size ≥3, 56,9% were involved in concurrent sexual partnerships. Having never been married （OR： 2.11; 95% CI： 1.03-4.33） and younger age （OR： 0.89; 95% CI： 0.83-0.95） were both associated with being in a component of size ≥3. Size （OR： 2.99; 95% Ch 1.17-7.66）, pair （OR： 0.54; 95% Ch 0.039-0.74）, the number of weak components of the egocentric sexual network （OR- 30.04; 95% Ch 6.47-139.46） and gender （OR. 0. 19; 95% Ch. 0.06-0.67） were all associated with being in concurrent sexual partnerships. HIV-related interventions for the Yi ethnic minority in Sichuan province must therefore address concurrent sexual partnerships and promote condom use.

关键词： AIDS China concurrent sexual partnership egocentric ethnic minority HIV sexual behaviour sexual network Yi

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Advances in research of HIV transmission networks

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Chinese Medical Journal 2020年第23期133卷 2850-2858页

作者： Zhi-Long Dong George Fu Gao Fan Lyu National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China

Transmission network analysis is a crucial evaluation tool aiming to explore the characteristics of the human immunodeficiency virus epidemic,develop evidence-based prevention strategies,and contribute to various areas of human immunodeficiency virus/acquired immunodeficiency syndrome prevention and control.Over recent decades,transmission networks have made tremendous strides in terms of modes,methods,applications,and various other aspects.Transmission network methods,including social,sexual,and molecular transmission networks,have played a pivotal role.Each transmission network research method has its advantages,as well as its limitations.In this study,we established a systematic review of these aforementioned transmission networks with respect to their definitions,applications,limitations,recent progress,and synthetic applications.

关键词： Human immunodeficiency virus HIV Transmission networks Social network sexual network Molecular transmission network Molecular epidemiology

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