Sexual risk factors among self-identified lesbians, bisexual women, and heterosexual women accessing primary care settings

OBJECTIVES: There is scant data on the sexual behaviors of women of diverse sexual orientations in a low-risk population. GOALS: The goals of this study were to sample women of all sexual orientations in primary care settings and to evaluate sexual behaviors and risk for HIV and other sexually transmitted diseases (STDs). STUDY: A total of 1,304 women (self-identified as 49% heterosexual, 11% bisexual, and 40% lesbian) were surveyed by anonymous questionnaire at 33 healthcare sites. RESULTS: Among women who recently had sex with men (N = 600), 51% reported ever using condoms. Heterosexual women were at highest risk for acquiring HIV as a result of lack of condom use (P <0.001), particularly in higher-risk situations. Bisexual women reported substance use with sex at a higher rate than lesbians or heterosexual women (P <0.001). Lesbians had higher rates of sex with bisexual men (P <0.001) and injection drug users (P <0.02), but also a higher rate of condom use (P <0.001) compared with bisexual or heterosexual women. CONCLUSION: Women of all sexual orientations, and particularly heterosexual women, engaged in behaviors that put them at risk for HIV and STD.     

青岛市男男性行为人群艾滋病高危性行为调查

目的:了解男男性行为人群(MSM)的高危性行为,为制定预防控制策略提供依据。方法:采用同伴推动抽样法对MSM人群进行问卷调查。结果:累计调查1849人,年龄中位数26岁,与男性发生过肛交者占98.37%;最近3个月男性性伴在2人以上者占46.29%,有女性性伴者占11.14%;最近一次与男性肛交时安全套使用率为57.92%,最近3个月与男性肛交时每次都使用安全套的比例为35.37%。结论:MSM人群普遍存在多性伴、无保护的性行为,传播性病艾滋病的风险较大。     

梧州市男男同性恋艾滋病相关知识知晓、性行为特征及感染情况

目的：了解梧州市男男同性恋（MSM）艾滋病相关知识、性行为特征及感染情况。方法：对梧州市辖区内的55名MSM进行问卷调查和艾滋病病毒抗体检测。结果：55名MSM艾滋病相关知识知晓率为89．09％;最近6个月与男性性伴发生性行为时均使用安全套的比例为30．9％。HIV抗体阳性检出率为9．09％。结论：为降低HIV感染风险,应在MSM人群中推广100％安全套,提倡正确的安全性行为。     

中国不同地区男男性接触者艾滋病高危性行为对比研究

目的 :　探讨中国不同地区男男性接触者 (MSM)艾滋病 (AIDS)高危性行为特点 ,为不同地区制定针对MSM的AIDS干预措施提供科学依据。方法 :　采用不记名问卷调查方式收集高危性行为资料。结果 :　东北三省的MSM近 1年性伴数、近 1年在外地男男性交发生率、曾群交的发生率显著高于其它地区 (P <0 .0 5 ) ;长江中下游地区的MSM男男性交时安全套总使用率及近 1年使用率显著低于其它地区 (P<0 .0 5或P <0 .0 1) ;渝云贵川粤桂闽琼的MSM近 1年在未使用安全套情况下肛门被插入的发生率显著高于其它地区 (P <0 .0 5 ) ;西北地区的MSM性传播感染的患病率显著高于其它地区 (P <0 .0 5 ) ,而检测抗HIV的比例显著低于其它地区 (P <0 .0 1)。结论 :　中国不同地区的MSM的AIDS高危性行为具有各自的特点 ,应针对不同的特点制定其相应的AIDS干预措施。     

Relationship between syphilis and HIV infections among men who have sex with men in Beijing, China

BACKGROUND: Little is known about risk of HIV and other STDs among men who have sex with men (MSM) in China. OBJECTIVE: To survey the prevalence and risk factors of HIV and syphilis and evaluate correlation of two infections among MSM in the Chinese capital city. METHODS: A community-based sample of 526 MSM was recruited in 2005 through Internet advertising, community outreach, and peer referring. Interviewer-administered interviews were conducted to collect information on demographics and sexual and other risk behaviors, and blood samples were collected to test for syphilis and HIV infections. RESULTS: Seventeen (3.2%) participants were HIV seropositive and 59 (11.2%) syphilis seropositive. Sixty-four percent of participants were migrants who did not have Beijing residence. Forty percent had >10 lifetime male sex partners and 28.8% reported having ever had sex with women. Consistent condom use with primary male sex partners ranged from 21% to 24%, with nonprimary male sex partners from 35% to 42%, and with female partners around 33%. Illicit drug use was not common; only 2.5% reported using Ecstasy or ketamine in the past 6 months. Multivariate logistic regression analyses demonstrated that >10 lifetime male sex partners were independently associated with seropositivity of both syphilis (OR, 1.9; 95% CI, 1.1-3.4) and HIV (OR, 4.3; 95% CI, 1.4-13.6). In addition, HIV infection is significantly associated with syphilis seropositivity (OR, 3.8; 95% CI, 1.3-10.8). CONCLUSIONS: High mobility, multiple sexual partners, and high prevalence of unprotected sex behaviors and syphilis infection suggest a potential rapid spread of HIV in Chinese MSM.     

HIV related behaviours and attitudes among Chinese men who have sex with men in Hong Kong: a population based study

OBJECTIVE: This study was conducted in order to determine the prevalence of men having sex with men (MSM) and their HIV related behaviours and attitudes among Chinese men in Hong Kong. METHODS: A large scale, random, population based, anonymous telephone survey of 14 963 men between the ages of 18-60 was conducted. The overall response rate was approximately 57%. RESULTS: Of the respondents, 4.6% had ever engaged in MSM activity. In the 6 months preceding the survey, 2.0% had engaged in MSM behaviours (active MSM) and 0.5% reported having engaged in anal sex MSM behaviours. Among anal sex MSM, consistent condom use was 42.9% with male non-commercial sex partners and even lower with male commercial sex partners (35.7%). Approximately 11% of anal sex MSM and 4.1% of the non-anal sex MSM had contracted an STD in the last 6 months. The prevalence of HIV testing was only 20.6% among anal sex MSM and 11.9% among non-anal sex MSM. CONCLUSIONS: Active MSM in Hong Kong are at high risk of HIV infection. The belief of low vulnerability to HIV is prevalent among active MSM in Hong Kong with only 2.0% believing that their chances of HIV infection as being "very likely."     

江苏苏南MSM集中活动的娱乐场所人群状况调查

目的:了解江苏苏南地区MSM集中活动娱乐场所现场人员状况。方法:在集中时间段利用周末对现场人员开展现场人员生活环境、性行为、性病艾滋病知识等的问卷调查。结果:共有553人同意并参加了问卷调查,平均年龄28.78±9.24岁,绝大多数为未婚者并以同性性行为为主。他们的首次性行为发生的平均年龄为19.88±3.91岁,首次发生同性性行为的平均年龄21.58±4.78岁。近3个月有异性性伴者的平均异性伴数1.06±1.06个,有同性性伴者的平均同性性伴数2.51±2.30个。近3个月中肛交行为多于口交行为和手淫行为。其中17.2%的人不会正确使用安全套。性病艾滋病知识未达到90%正确的占31.3%。讨论:MSM聚集的娱乐场所是开展健康干预的重要场所,安全套推广应该更注重正确使用的细节宣传。     

中国16个城区男男性行为人群梅毒感染情况及影响因素分析

目的 了解中国6个省（自治区、直辖市）的16个城区的男男性行为人群（MSM）的梅毒感染情况及其影响因素。方法 于2007年在开展绘制MSM活动场所地理分布图及人群规模估计的基础上，用分类的非概率抽样方法在MSM中开展横断面调查；通过问卷调查收集人口学、危险行为以及梅毒感染等信息。用SPSS软件对数据进行单因素及多因素Logistic回归分析。结果 2007年共收集4211份有效问卷。所调查的MSM平均年龄为28岁，自报为同性恋占66.7%，未婚占72.5%，高中及其以上教育程度占76.4%。近6个月MSM的性行为调查结果显示：8.7%有10个以上的男性性伴，5.6%曾买男性性服务，11.3%曾为男性提供商业性服务，18.9%曾与女性发生过性关系，与男性肛交性行为中的安全套坚持使用率仅为36.3%。所调查MSM的梅毒感染率为10.6%。多因素Logistic回归分析结果显示：年龄 > 25岁［调整OR（AOR） = 1.7，95% CI：1.3 ~ 2.0］、本市户籍（AOR = 1.3，95% CI：1.0 ~ 1.7）、调查地区、酒吧/公园招募对象（AOR = 1.3，95% CI：1.1 ~ 1.7）、买男性性服务（AOR = 1.5，95% CI：1.0 ~ 2.1）、男男肛交行为中不坚持使用安全套（AOR = 1.2，95% CI：1.0 ~ 1.5）和自报性病史（AOR = 1.3，95% CI：1.0 ~ 1.7）是梅毒感染的独立相关变量。结论 16个城区MSM的梅毒感染率已达一定水平、男男商业性服务及不安全性行为的流行率较高，亟待加强MSM的梅毒防治工作，包括梅毒和ＨＩＶ筛查、推广使用安全套等综合干预措施。     

深圳地区男男性接触者性病艾滋病知识及相关高危性行为调查

目的:了解深圳地区男男性接触者性病艾滋病高危行为状况,为高危人群行为干预提供科学依据。方法:知情同意原则下填写调查问卷,收集整理资料后进行分析。结果:203例男男性接触者中,年龄最小15岁,最大57岁,平均年龄26岁。学历以高中/中专为主(38.9%),婚姻状况以未婚为主(86.7%),主要居住在罗湖(47.78%)、福田(23.65%)。首次性行为年龄最小12岁,最大30岁,52.2%的男男性接触者第一个性伴为男性,平均性伴数31个;双性恋占47.3%,同性恋占43.8%,异性恋占2.0%;过去6个月与男性肛交每次都用安全套仅41.4%;14.3%回答曾经与外国人发生性接触;12.3%回答曾有医生护士或保健人员告之得了某种性病;54.2%做过HIV检测。结论:男男性接触者普遍多性伴,安全套使用率相对较低,加强对MSM的性病艾滋病防治已刻不容缓。     

昆明市男男性接触者行为特征的研究

目的了解男男性接触者的行为特征,为制定相应的预防控制策略提供科学依据。方法采用方便样本和滚雪球的方法对男男性接触者进行问卷调查。结果所调查的男男性接触者中艾滋病知识知晓率达到85.8%;最近6m有33.3%的人有过双性性行为,与女性发生性行为时,52.3%几乎不使用安全套;最近6m内与固定性伴、临时性伴和商业性伴肛交时每次均使用安全套的比例分别是51.1%、57.5%和52.1%;59%的人在患了性病后选择到公立医院就医,27%的人选择自己买药,另有14%的人到私人诊所或干脆不做处理。结论对男男性接触者的干预除了注重覆盖面,更应关注干预措施的深度,如何提高安全套的坚持使用率成为干预的关键因素。     

Evidence of heterosexual bridging among syphilis-positive men who have sex with men

OBJECTIVE: To explore whether heterosexual bridging among syphilis-positive men who have sex with men (MSM) contributes to increased infection rates among adolescent women in Baltimore City, Maryland. METHODS: Interview data for patients with primary, secondary and early-latent syphilis from January 2001 to July 2005 were linked with their corresponding field records for named exposed contacts to assess prevalence of male bisexual activity and risk profiles of potential male bisexual bridgers and their female sex partners. RESULTS: None of the women with syphilis reported having known heterosexual relationships with a bisexual man. However, 3.9% and 11.0% of the male sex partners of adolescent females and women aged >25 years with syphilis, respectively, self-reported as MSM or named male sex partners. Likewise, 10.3% of syphilis-positive MSM named female sex partners and 3.0% of syphilis-positive men who did not self-identify as MSM named both male and female sex partners. CONCLUSIONS: Sexual network links exist between syphilis-positive MSM and heterosexual women, but the extent of bisexual behaviour among men is not detectable by self-identification and disclosure to female sex partners.     

Prevalence and risk behaviors of Hong Kong males who seek cross-border same-sex partners in mainland China

BACKGROUND: Little is known about cross-border sex-networking behaviors among men who have sex with men (MSM) GOAL: The goal of this study was to determine the prevalence of cross-border sex-networking in mainland China among MSM in Hong Kong and the associated risk behaviors STUDY: A telephone survey was conducted. A total of 15,230 Hong Kong Chinese men aged 18 to 60 participated in the study. RESULTS: Of the 283 MSM engaged in some MSM behaviors in the last 6 months, 15.2% had engaged in sexual activity with a man in mainland China in the 6 months before the survey. These "cross-border MSM" were more likely than others to have practiced risk behaviors such as having patronized male commercial sex workers, having contracted a sexually transmitted disease (STD), having had > or = 3 MSM partners, and having higher prevalence of HIV testing in the last 6 months (adjusted odds ratio, 3.32-43.83). CONCLUSIONS: There is an urgent need for a regional approach to HIV/STD prevention for MSM in southern China.     

The effect of venue sampling on estimates of HIV prevalence and sexual risk behaviors in men who have sex with men

OBJECTIVE: The objective of this study was to investigate differences in HIV prevalence and sexual risk behaviors among men who have sex with men (MSM) according to their gay venue visit patterns. METHODS: In a cross-sectional survey, a population-based sample of men aged 18 to 64 years who self-identified as gay or bisexual were interviewed by telephone regarding their sexual behaviors, HIV serostatus, and gay venue visit patterns. RESULTS: A total of 398 men were recruited for the study. The results showed that frequent gay venue visitors were more likely to engage in high-risk sexual behaviors. Among gay venue attendees who visited different types of gay venues, men who visited sex clubs/bathhouses reported the highest rates of 5 or more male sexual partners and unprotected anal intercourse (UAI) with secondary partners (62.6% and 34.6%, respectively), gay bar/club attendees and cruisers reported higher rates of having sex with women (8.5% and 14.8%, respectively), and circuit party attendees reported the highest HIV prevalence (40.4%) and serodiscordant UAI (30.2%). CONCLUSIONS: MSM who visited different types of gay venues and with varied visit frequency showed marked differences in sexual risk behaviors, and the differences suggest the importance of weighting procedure to obtain unbiased estimates in venue-based studies.     

深圳市男男性接触人群梅毒合并HIV感染状况及其危险因素分析

目的：了解深圳市近6个月内发生过同性临时性行为的MSM人群梅毒合并HIV感染状况及其相关影响因素。方法：运用滚雪球法和同伴推动抽样法招募MSM进行问卷调查和血清学检测,采用χ2检验和Logistic回归分析梅毒HIV合并感染的相关影响因素。结果：共调查434例MSM,梅毒和HIV感染率分别为16.4%和12.2%,梅毒合并HIV感染率为7.3%。年龄越大（OR=4.0,P=0.0007）、高中/中专文化者（OR=6.5,P=0.0081）、性角色以被动方为主者（OR=12.1,P=0.0017）、多个同性肛交性伴者（OR=1.5,P=0.0455）、不能坚持每次使用安全套者（OR=2.9,P=0.0236）,其梅毒合并HIV感染风险越高。结论：需要采取更大努力来应对该人群的梅毒和HIV双重感染问题。     

深圳男男性接触者多性伴与社交软件使用习惯现况及相关性分析

目的：调查深圳地区男男性接触者(MSM)近6个月同性多性伴和社交软件使用现况,探索两者关系。方法：2016年8月至2017年6月,运用滚雪球法和同伴推动抽样法在深圳市招募315名MSM进行问卷调查,收集该人群社会人口学、近6个月同性性伴数、同志社交软件使用习惯等信息。应用χ2检验和有序Logistic回归分析性伴数量和同志社交软件使用习惯的关系。结果：共291名MSM纳入调查,其近6个月同性性伴数中位数为2（四分位数间距：1～5）人,其中“0～1人性伴组”占28.2%,“2～4人性伴组”占46.7%,“≥5人性伴组”占25.1%。有序Logistic回归分析结果显示,多种方式寻找性伴（aOR=1.14,95% CI：1.05～1.86）,使用同志社交软件获得一夜情（aOR=2.00,95% CI：1.46～2.73）或寻找性伴的频率2次/每月及以上（aOR=2.70,95% CI：1.77～4.12）的MSM性伴数量更多。结论：MSM近6个月多性伴较普遍,与同志社交软件使用习惯相关。     

Differences in HIV risk behaviors among black and white men who have sex with men

OBJECTIVES: Surveillance findings consistently indicate that black men who have sex with men (MSM) experience a disproportionate burden of HIV/AIDS compared with white MSM. This study tested the hypothesis that black MSM engage in greater levels of HIV risk behaviors than white MSM and sought to determine if self-reported HIV serostatus moderated any of the observed differences. METHODS: A cross-sectional study of MSM was conducted by recruiting men from gay-identified venues in a large metropolitan area of the southern United States. Data were collected by face-to-face interview. RESULTS: The hypothesis was only supported for one measure of HIV risk behavior: The average number of main (steady) sex partners in the past year was significantly greater among black men (P < 0.0001). However, black and white MSM did not significantly differ in unprotected sex with serodiscordant partners. Racial differences in sexual risk behavior were found only for HIV-negative men and indicated greater protective behavior for black men. DISCUSSION: These findings suggest that fewer black MSM, compared with white MSM, engage in HIV sexual risk behaviors but only among HIV-negative men. Identifying the epidemiologic dynamics driving HIV infection among black MSM that go beyond individual-level risk behaviors may be warranted.     

Heterosexual transmission of HIV in China: a systematic review of behavioral studies in the past two decades

OBJECTIVE: The objective of this study was to address the role of heterosexual transmission of HIV in China. GOAL: The goal of this study was to explore the prevalence of unsafe sex and the likelihood of HIV spread heterosexually from core populations to others. STUDY: The authors conducted a review of behavioral studies. RESULTS: Drug users were more likely to be involved in higher-risk sexual behaviors than were those who abstained from using drugs. Most female drug users (52-98%) reported having engaged in commercial sex. Most female sex workers (FSWs) and individuals with sexually transmitted diseases (STDs) had concurrent sexual partners. Many continued to have unprotected sex after noticing STD symptoms in themselves or their sexual partners. From 5% to 26% of rural-to-urban migrants had multiple sexual partners and 10% of males patronized FSWs during migration. CONCLUSIONS: Factors such as high rates of FSW patronage, low rates of condom use during commercial sex, having sex with both commercial and noncommercial sexual partners, and high rates of STD infection may promote a heterosexual epidemic in China.     

Sexual risk behaviors associated with having older sex partners: a study of black adolescent females.

BACKGROUND: Volunteer black adolescent females from neighborhoods characterized by high rates of unemployment, substance abuse, violence, and sexually transmitted disease were studied to determine the frequency of condom use and unprotected vaginal sex with steady, older partners during various time periods over the previous 6 months. GOAL: To examine associations between having male sex partners who were typically older (by at least 2 years) and adolescent females' sexually transmitted disease (STD)/HIV-associated sexual risk behaviors. STUDY DESIGN: In this cross-sectional study, 522 sexually active black adolescent females completed a questionnaire and a structured interview, of which a portion assessed the age difference between the adolescents and their typical sex partners. The adolescents' ages, length of relationship and their use of hormonal contraception were identified as covariates. Adjusted odds ratios (AOR), their 95% confidence intervals, and respective P values were calculated to detect significant associations. RESULTS: Sixty-two percent of the adolescents reported their typical sex partners were at least 2 years older. These adolescents were more likely to report never using condoms during the most recent sexual encounter (AOR = 2.0), during the last five sexual encounters (AOR = 2.0), and during the past month (AOR = 2.2). Similarly, having older partners was associated with greater odds of reporting any unprotected vaginal sex in the past 30 days (AOR = 1.7) or the past 6 months (AOR = 1.5). CONCLUSION: Our findings suggest that many adolescent females have sex partners who are at least 2 years older and that their relationship dynamics do not favor the adoption and maintenance of behavior protective against STD or HIV infection. Prevention programs could include training designed to help adolescent females overcome barriers to safer sex with older male partners.     

Prevalence of sexually transmitted infections and high-risk sexual behaviors in heterosexual couples attending sexually transmitted disease clinics in Peru

OBJECTIVES: The objectives of this study were to determine the prevalence of sexually transmitted infection (STIs) in heterosexual couples and the sexual behaviors associated with their acquisition. GOAL: The goal of this study was to better direct educational efforts to decrease STI among heterosexual couples in Lima, Peru. STUDY DESIGN: We conducted a case-control study in 195 heterosexual couples without HIV infection who attended 2 sexually transmitted disease clinics in Lima, Peru. A case was defined as an individual with one or more newly diagnosed STIs such as gonorrhea, chlamydia, trichomoniasis, herpes simplex, syphilis, mycoplasma, or ureaplasma. RESULTS: Thirty-three percent of individuals (41 men and 89 women) had at least one STI and 26 couples (13%) had the same STI detected. Men who have sex with men (MSM) accounted for 13% of all men, had higher rate of STIs and higher risk behaviors than non-MSM. Ureaplasma infection was the most prevalent STI found in both men and women and was associated with oral sexual contact. In heterosexual pairs, condom use during anal sex occurred less than 10% of the time. CONCLUSIONS: The heterosexual couples in sexually transmitted disease clinics have high-risk behaviors and STIs are frequent. The educational effort concerning prevention of STIs requires higher effort.     

Commercial sex venues: a closer look at their impact on the syphilis and HIV epidemics among men who have sex with men

OBJECTIVE: To provide insight into the role of commercial sex venues in the spread of syphilis and HIV among men who have sex with men (MSM). Study: A cross sectional study of 1351 MSM who were diagnosed with early syphilis who did and did not encounter sexual partners at commercial sex venues. RESULTS: Overall, 26% MSM diagnosed with syphilis had sexual encounters at commercial sex venues. Of these, 74% were HIV positive, 94% reported anonymous sex, and 66% did not use a condom. Compared to those who did not have a sexual encounter at these venues, they were twice as likely to be HIV positive (OR = 1.91, 95% CI 1.36 to 2.68), six times more likely to have anonymous sex (OR = 6.18, 95% CI 3.37 to 11.32), twice as likely not to use condom (OR = 2.02, 95% CI 1.71 to 2.38), and twice as likely to use non-injecting drugs (OR = 1.65, 95% CI 1.21 to 2.37). CONCLUSIONS: MSM diagnosed with syphilis who frequent commercial sex venues are engaging in high risk behaviours for syphilis and HIV transmission and acquisition. Thus commercial sex venues are one of the focal points of syphilis and HIV transmission and acquisition.