北京市男男性行为者安全套使用社会规范与无保护性肛交关系的研究

Objective To understand the prevalence of and factors associated with unprotected anal intercourse(UAI)among men who have sex with men(MSM)in Beijing.Methods Five hundred MSM were recruited for a survey using Respondent Driven Sampling (RDS)method, from September to October in 2009. A computer-assisted, interviewer-administered questionnaire was used to gather information including demographics, sexual behaviors and condom use social norms(a scaled number). Variables were evaluated by using RDSAT and SAS software.Results Mean age of the participants was 30.6 years, with 96.0% of them as Han ethnicity and68.5% having had at least high school or higher education level. 72.8% of them were unmarried, with 61.7% of them identified themselves as homosexual, 61.2% had ＞ 1 male partners in the past six months, and the prevalence of UAI was 42.0%. Significant bivariate predictors of UAI would include condom use social norms score, role for anal sex with male sex partner, number of male sexual partners in the past 6 months and amount of alcohol consumed. In multivariable analysis, UAI was associated with a higher condom use social norms score(AOR= 1.2, 95%CI: 1.1-1.3), receptive anal intercourse(AOR=2.0, 95%CI: 1.3-3.2)and drinking alcohol more than 3 times per month in the past 12 months(AOR=1.6, 95%CI: 1.1-2.5). Conclusion The prevalence of UAI was high in the MSM community in Beijing, suggesting that efforts should be targeting on how to make the condom use a social norm and being promoted.     

北京市男男性行为者安全套使用社会规范与无保护性肛交关系的研究

目的 了解北京市男男性行为者(MSM)无保护性肛交发生情况及其与社区安全套使用社会规范的关系.方法 2009年9-10月采用应答驱动抽样方法(RDS)在北京市MSM中开展调查,问卷采用计算机辅助调查员访谈式,内容包括人口学、性行为学特征及安全套使用社会规范,使用RDSAT和SAS进行统计学分析.结果 500名MSM平均年龄30.6岁,96.0%为汉族,高中及以上文化程度者占68.5%,72.8%未婚.61.2%最近6个月男性性伴数量＞1;42.0%的调查对象最近一次发生过无保护性肛交.多因素统计分析表明,差异有统计学意义的变量包括安全套使用社会规范计分低(AOR=1.2,95%CI:1.1-1.3),肛交中非主动角色(AOR=2.0,95%CI:1.3-3.2)和近12个月饮酒次数＞3次/月(AOR=1.6.95%CI:1.1-2.5).MSM社区安全套使用社会规范量表内部一致性检验克朗巴赫系数为0.93.结论 北京市MSM无保护性肛交行为发生率较高,应充分发挥MSM社区内社会规范的作用,减少无保护性肛交行为的发生.

Abstract：

Objective To understand the prevalence of and factors associated with unprotected anal intercourse(UAI)among men who have sex with men(MSM)in Beijing.Methods Five hundred MSM were recruited for a survey using Respondent Driven Sampling (RDS)method, from September to October in 2009. A computer-assisted, interviewer-administered questionnaire was used to gather information including demographics, sexual behaviors and condom use social norms(a scaled number). Variables were evaluated by using RDSAT and SAS software.Results Mean age of the participants was 30.6 years, with 96.0% of them as Han ethnicity and68.5% having had at least high school or higher education level. 72.8% of them were unmarried, with 61.7% of them identified themselves as homosexual, 61.2% had ＞ 1 male partners in the past six months, and the prevalence of UAI was 42.0%. Significant bivariate predictors of UAI would include condom use social norms score, role for anal sex with male sex partner, number of male sexual partners in the past 6 months and amount of alcohol consumed. In multivariable analysis, UAI was associated with a higher condom use social norms score(AOR= 1.2, 95%CI: 1.1-1.3), receptive anal intercourse(AOR=2.0, 95%CI: 1.3-3.2)and drinking alcohol more than 3 times per month in the past 12 months(AOR=1.6, 95%CI: 1.1-2.5). Conclusion The prevalence of UAI was high in the MSM community in Beijing, suggesting that efforts should be targeting on how to make the condom use a social norm and being promoted.     

北京市大学在校生男男性行为者HIV感染状况及其相关危险陛行为调查

目的 了解北京市大学在校生男男性行为者的HIV感染状况及其相关危险性行为.方法 研究对象主要通过网络招募,采用自填式问卷调查.问卷内容包括人口学信息与艾滋病相关危险行为等.问卷完成后采集血液样本进行HIV血清学检测.单因素分析采用X2检验,多因素分析采用logistic同归.结果 研究成功招募157人.平均年龄为(22.7±2.8)岁,少数民族占12.1%,77.7%自我认同为同性恋.98.1%曾有肛交行为,73.9%报告肛交是常采用的性行为方式.157人中近6个月有58.6%发生过无保护肛交,有58.0%口交时从不使用安全套,其中59.2%存在多性伴(性伴数≥2)行为.近50.0%认为自己不可能感染HIV或者风险很小,检测发现HIV阳性率为2.5%.logistic回归分析结果 显示,曾与陌生人发生性行为(OR=13.10)、了解"肛交时做主动方比做被动方感染HIV风险小"(OR=3.37)以及曾去同性恋酒吧(OR=2.49)是近6个月发生多性伴行为的独立危险因素.结论 大学在校生男男性行为者无保护肛交和多性伴行为较普遍.亟需开展有针对性的干预活动,预防HIV在该人群中传播.

Abstract：

Objective To assess the prevalence of HIV and risky sexual behaviors among university students who have sex with men(MSM)in Beijing.Methods MSM students in the universities were mainly recruited via internet.Questionnaires were self-administered to collect social demographic information and AIDS-related risky sexual behaviors.After completing the questionnaire,blood sample was collected to determine HIV infection through serological testing.X2 test and logistic regression were employed for univariate and multivariate analysis,respectively.Results A total of 157 students were recruited with mean age of 22.7±2.8 years old,12.1%of them were minorities and 77.7% were self-identified as homosexual.98.1% had engaged in anal intercourse(AI)in their lifetime and 73.9%reported that AI was common sexual behavior they often practised.In the past 6 months,58.6% had ever had unprotected anal intercourse(UAI),58.0% never used condoms during oral intercourse,and 59.2% had multiple sex partners(≥2).Nearly half of them believed that they were at low or no risk of contracting HIV and the prevalence of HIV infection was 2.5%.Data from logistic regression analysis showed that ever having had sex with a casual partner in a lifetime (OR=13.10).understanding that serving an insertive role had less risk than being receptive during the AI (OR=3.37),and ever having been to a gay bar(OR=2.49)was independently related to having multiple sex partners in the past 6 months.Conclusion Despite the extensive programs on education,behaviors regarding UAI and ever having had multiple sex partners were silll commonly seen among university MSM students.Interventions were needed to prevent HIV transmission in this population.     

深圳市男男性行为人群相关高危行为干预及其影响因素研究

目的 了解深圳市男男性行为者(MSM)安全套使用及其相关影响因素.方法 2009年8-11月招募深圳市同性恋聚集地的同性接触人群作为访谈对象,采用统一调查表进行问卷调查.对调查的273名MSM进行人口学和行为特征分析;以近6个月发生性行为时不能坚持每次使用安全套的行为为应变量,而各类影响因素为自变量进行logistic回归分析.结果 调查对象来自全国各地,绝大部分为青壮年,平均年龄27.9岁,以未婚居多,文化程度较高,但对艾滋病知识缺乏;安全套使用率低,过去1年每次性行为均使用安全套的比例为20.5%;与同性发生性行为不使用安全套的原因主要是对方为"稳定的性伴和爱人"、"年轻,看起来没病"、"没有滥交".结论 深圳市MSM危险性行为普遍存在,安全套使用情况和影响因素各不相同,艾滋病极有可能在该人群中流行.

Abstract：

Objective To learn the condom-use and it's associated factors among men who have sex with men(MSM)in Shenzhen,so as to provide scientific basis for the development of prevention and control program.Methods Cross-sectional survey was conducted with standardized questionnaire used on individual case.Associated factors with behavior of not persistent condom use were analyzed,using logistic regression method as dependent variable and associated factors with behaviors as independent variables.Results Most of the MSM were young,with average age as 27.9.coming from 26 provinces of China.Only 20.5 percent of the participants were persistently using condoms every time with their sex partners in the past year. The main reasons of not constantly using condom with their male sex partners were having fixed partners,being young,healthy and being faithful.Conclusion High risk sexual behaviors and the low rate of condom-use among MSM might serve as potential risks for HIV epidemics.Data on the rate of condom use and the influencing factors among MSM varied for different sexual partners,suggested that targeted prevention measures should be conducted.     

北京市男男性行为者HIV和梅毒螺旋体血清抗体阳转率及影响因素

目的 了解北京市男男性行为者(MSM)的HIV和梅毒螺旋体血清抗体阳转情况及其影响因素. 方法 在北京市以社区为基础招募HIV阴性的MSM共525名,以一对一的方式进行问卷调查,收集人口学和行为学情况资料,在第6、12个月进行随访,并采集血样进行HIV和梅毒螺旋体抗体检测,初筛均采用ELISA法,确证分别采用蛋白印迹(WB)和凝集法. 结果 基线共调查550名,HIV和梅毒螺旋体血清抗体阳性率分别为4.5%(25/550)和29.3%(161/550),HIV血清抗体阴性队列525名,随访12个月,队列保持率为87.0%(457/525),HIV和梅毒螺旋体血清抗体阳转率分别为3.37/100人年和9.32/100人年.近3个月同性性行为后冲洗直肠者阳转率为7.11/100人年,未冲洗者为0.76/100人年,冲洗与HIV血清抗体阳转相关(HR=9.23,95%CI=2.08～40.88).近3个月在公园、公厕或浴池寻找男性性伴者阳转率为41.77/100人年,无该行为者阳转率为7.97/100人年;近3个月同性性行为后冲洗直肠者阳转率为16.17/100人年,无该行为者阳转率为4.92/100人年;近3个月在公园、公厕或浴池寻找男性性伴(HR=4.67,95%CI=1.77～12.34)和近3个月同性性行为后冲洗直肠(HR=3.09,95%CI=1.40～6.83)与梅毒螺旋体血清抗体阳转相关. 结论 北京市MSM的HIV和梅毒螺旋体血清抗体阳转情况十分严重,主要影响因素为同性性行为后冲洗直肠、到公园等场所寻找男性性伴.

Abstract：

Objective To study the incidence and risk factors of HIV and syphilis seroconversion among men who have sex with men(MSM) in Beijing. Methods A total of 550 MSM were recruited on the basis of community and followed up after 6 and 12 months in Beijing.Each subject was investigated by only one investigator at one time to collect information on demographics and behaviors.Blood samples were collected to test HIV and syphilis seroconversion.ELISA was used for screening test,west blotting(WB) and Particle agglutination were used for confirmatory test. Results A total of 550 MSM investigated,among which 4.5% (25/550) were HIV-positive and 29.3% (161/550) were syphilis-positive.For 525 HIVnegative MSM,87.0% (457/525) retained during the 12-month investigation.Seroincidences for HIV and syphilis were 3.37/100 person-years (95% CI = 1.66-5.08) and 9.32/100 person-years (95% CI =5.87-12.77) respectively.HIV seroconversions for those who performed and did not perform rectal douching after homosexual anal intercourse in the past 3 months were 7.11/100 and 0.76/100 person-years respectively.Multivariate Cox regression analysis revealed that rectal douching after homosexual anal intercourse in the past 3 months(HR=9.23,95%CI =2.08-40.88) was significantly associated with HIV seroconversion.Syphilis seroconversions for those who met male sex partners in parks,public washrooms or bathhouses in the past 3 months were 41.77/100 and 7.97/100 person-years respectively.Syphilis seroconversions for those who performed and did not perform rectal douching after homosexual anal intercourse in the past 3 months were 16.17/100 and 4.92/100 person-years respectively.In the past 3 months,meeting male sex partners in parks,public washrooms or bathhouses (HR=4.67,95% CI = 1.77-12.34) and performing rectal douching after homosexual anal intercourse (HR = 3.09,95% CI=1.40-6.83) were significantly associated with syphilis seroconversion. Conclusion The seroconversions of HIV and syphilis during the follow-up visits in this MSM cohort study in Beijing were very serious,and that the associated factors for seroconversions were rectal douching after homosexual anal intercourse and meeting male sex partners in parks,public washrooms or bathhouses.     

男男性行为者自我歧视与性行为和心理因素的关系

Objective To understand the self-discrimination experience of MSM and its relationship with sexual behavior and psychological factors.Methods By respondent-driven sampling(RDS) method, a call-for action and anonymous self-administration questionnaire investigation was carried out in Mianyang city on experience of self-discriminations, sexual partners and behaviors and depression symptom, etc.The first 12qualified people were designated as the "root" in the whole investigation from different MSM subgroups.Every "root" would get 3 recruit cards after their own investigation,then cards could be promoted to another 3 qualified people who were willing to accept questionnaires.And this process would go on till the sample size was accomplished.χ2 test,rank correlation and contingency coefficient would be applied for the statistical analysis.Results In total, 201 persons were investigated.Within the past 6 months, 59.2%(119/201) persons felt they did harm to their family or made the family down as gays ,79.6% (160/201)had to disguise their real sexual orientation in avoidance of being discriminated, 39.3% ( 79/201 ) were humiliated for having gay sex.It showed correlation between humiliation or harm to family and frequency to disco balls/night clubs( r = 0.196, χ2 = 7.95, P ＜ 0.05 ), concerts or theaters ( r = 0.201, χ2 = 8.423, P ＜0.05 ) with MSM friends, HIV health consultancy ( r = 0.231, χ2 = 11.329, P ＜ 0.05 ), experiences of one night stands ( rs = 0.183 ,μ = 2.588, P ＜ 0.05 ), detection of depression ( rs = 0.241 ,μ = 15.717, P ＜ 0.05 )and stress-related perception(rs =-0.310,μ= 23.112,P＜0.05) ,the corresponding behavior report rates of who experienced 3 -4 times were 66.7% ( 11/33 ) ,52.9% ( 18/34 ) ,41.2% ( 14/34 ), 17.6% ( 6/34 ),44.1% (15/34) ,44.7% (10/24).Statistical significance was found between the relations of humiliation for gay sex and frequency into concerts or theaters ( r = 0.195, χ2 = 7.933, P ＜ 0.05 ) with MSM friends,experiences of one night stands (rs =0.145,μ=2.051,P＜0.05),man-man anal sex (r=0.165,χ2 =10.823, P ＜ 0.05 ), numbers of female sexual partners ( r = 0.265, χ2 = 11.422, P ＜ 0.05 ), protectiveness of female sexual behavior in the past 6 months ( r =0.513 ,χ2 =7.442 ,P ＜0.05 ) ,detection of depression( rs =0.152 ,μ = 13.034, P ＜ 0.05 ) and stress-related perception ( rs = - 0.259,μ = 21.190, P ＜ 0.05 ), the corresponding behavior report rates of who experienced 3 - 4 times were 22.7% (5/22) ,9.1% (2/22),13.6% ( 3/22 ), 91.6% ( 2/22 ), 66.7% ( 2/3 ), 57.1% ( 4/7 ), 33.3% ( 19/57 ) .It has statistical significance between the relations of disguising their real sexual orientation in avoidance of being of HIV test ( r= 0.232, χ2 = 11.446, P ＜ 0.05 ), and stress-related perception ( rs = - 0.373 ,μ = 28.868,P ＜ 0.05 ).It was found that increasing of discrimination was connected to entrance into gay-welcome places,acceptance of HIV consultancy and tests, posting gay information among MSM friends and hold of many sexual partners.Meanwhile, the pressure was rising when depression was checked out.Conclusion Selfdiscrimination was prevalent among MSM ,which had brought critical influence on the individual behavior,MSM psychological health and prevalence of AIDS.     

男男性行为者自我歧视与性行为和心理因素的关系

Objective To understand the self-discrimination experience of MSM and its relationship with sexual behavior and psychological factors.Methods By respondent-driven sampling(RDS) method, a call-for action and anonymous self-administration questionnaire investigation was carried out in Mianyang city on experience of self-discriminations, sexual partners and behaviors and depression symptom, etc.The first 12qualified people were designated as the "root" in the whole investigation from different MSM subgroups.Every "root" would get 3 recruit cards after their own investigation,then cards could be promoted to another 3 qualified people who were willing to accept questionnaires.And this process would go on till the sample size was accomplished.χ2 test,rank correlation and contingency coefficient would be applied for the statistical analysis.Results In total, 201 persons were investigated.Within the past 6 months, 59.2%(119/201) persons felt they did harm to their family or made the family down as gays ,79.6% (160/201)had to disguise their real sexual orientation in avoidance of being discriminated, 39.3% ( 79/201 ) were humiliated for having gay sex.It showed correlation between humiliation or harm to family and frequency to disco balls/night clubs( r = 0.196, χ2 = 7.95, P ＜ 0.05 ), concerts or theaters ( r = 0.201, χ2 = 8.423, P ＜0.05 ) with MSM friends, HIV health consultancy ( r = 0.231, χ2 = 11.329, P ＜ 0.05 ), experiences of one night stands ( rs = 0.183 ,μ = 2.588, P ＜ 0.05 ), detection of depression ( rs = 0.241 ,μ = 15.717, P ＜ 0.05 )and stress-related perception(rs =-0.310,μ= 23.112,P＜0.05) ,the corresponding behavior report rates of who experienced 3 -4 times were 66.7% ( 11/33 ) ,52.9% ( 18/34 ) ,41.2% ( 14/34 ), 17.6% ( 6/34 ),44.1% (15/34) ,44.7% (10/24).Statistical significance was found between the relations of humiliation for gay sex and frequency into concerts or theaters ( r = 0.195, χ2 = 7.933, P ＜ 0.05 ) with MSM friends,experiences of one night stands (rs =0.145,μ=2.051,P＜0.05),man-man anal sex (r=0.165,χ2 =10.823, P ＜ 0.05 ), numbers of female sexual partners ( r = 0.265, χ2 = 11.422, P ＜ 0.05 ), protectiveness of female sexual behavior in the past 6 months ( r =0.513 ,χ2 =7.442 ,P ＜0.05 ) ,detection of depression( rs =0.152 ,μ = 13.034, P ＜ 0.05 ) and stress-related perception ( rs = - 0.259,μ = 21.190, P ＜ 0.05 ), the corresponding behavior report rates of who experienced 3 - 4 times were 22.7% (5/22) ,9.1% (2/22),13.6% ( 3/22 ), 91.6% ( 2/22 ), 66.7% ( 2/3 ), 57.1% ( 4/7 ), 33.3% ( 19/57 ) .It has statistical significance between the relations of disguising their real sexual orientation in avoidance of being of HIV test ( r= 0.232, χ2 = 11.446, P ＜ 0.05 ), and stress-related perception ( rs = - 0.373 ,μ = 28.868,P ＜ 0.05 ).It was found that increasing of discrimination was connected to entrance into gay-welcome places,acceptance of HIV consultancy and tests, posting gay information among MSM friends and hold of many sexual partners.Meanwhile, the pressure was rising when depression was checked out.Conclusion Selfdiscrimination was prevalent among MSM ,which had brought critical influence on the individual behavior,MSM psychological health and prevalence of AIDS.     

Serostatus disclosure and associated factors among people living with HIV/AIDS （PLWHA） in Liuzhou City,China

Introduction HIV serostatus disclosure has become an entry criterion for prevention of sexual partners spread, so we aimed to examine the prevalence of disclosure and associated factors among people living with HIV/ AIDS （PLWHA） in Liuzhou City, Guangxi Zhuang Autonomous Region, southern China. Methods The PLWHA with marital or regular sexual relationship were eligible for our study, and a self-de- signed questionnaire was assigned to all the convenient- ly sampled participants. Determinants of disclosure were analyzed using chi-square test and binary Logistic regression. Results A total of 425 PLWHA were included in the present study. Two hundred and forty-five （57.6%） disclosed their HIV-positive status to their spouses/reg- ular sexual partners, while 180（42.4% ） did not. A- mong the 245 informed spouses/regular sexual part- ners, 236 （96. 3 % ） had received the HIV testing and the positive rate was 50.4%. While among the non-informed spouses/regular sexual partners, 63 （35.0%） had received the HIV testing and the positive rate was 3.2%. Binary Logistic regression analysis indicated that age, area, monthly income, HIV/AIDS related knowledge and antiretroviral therapy （ART） were in- dependently associated with HIV serostatus disclosure. Conclusions The disclosure rate was low in this study. As to its influencing factors, it is necessary to provide comprehensive disclosure consulting among PLWHA living in urban, the elderly or high monthly income and emphasize the propaganda on HIV/AIDS related knowledge, expand coverage for antiretroviral therapy, so as to provide scientific reference for promoting HIV disclosure and reducing the HIV incidence of spouses/ regular sexual partners among PLWHA.     

Serostatus disclosure and associated factors among people living with HIV/AIDS( PLWHA) in Liuzhou City,China

Introduction HIV serostatus disclosure has become an entry criterion for prevention of sexual partners spread, so we aimed to examine the prevalence of disclosure and associated factors among people living with HIV / AIDS（ PLWHA） in Liuzhou City,Guangxi Zhuang Autonomous Region,southern China. Methods The PLWHA with marital or regular sexual relationship were eligible for our study,and a self-designed questionnaire was assigned to all the conveniently sampled participants. Determinants of disclo...     

中国18省市大学生首次性行为年龄的人群分布特征及其影响因素

目的 了解中国大学生首次性行为年龄的人群分布特征,为制定适宜的性教育提供依据.方法 采取无记名自填问卷方式,按照分层整群抽样方法,对18个省(市、区)33 653名大学生进行中国青少年健康危险行为问卷调查.结果 中国大学生14岁前发生性行为的报告率为1.9%,男、女生分别为2.8%和1.1%(P＜0.01);15～18岁发生性行为的报告率男、女生分别为6.4%和2.1%;19岁后发生性行为的报告率男、女生分别为6.9%和2.6%.大学生首次性行为的发生年龄与父母学历、所在地区和家庭结构密切相关.来自大家庭和核心家庭、居住在东中部地区、父母文化程度较低的大学低年级学生,首次性行为发生年龄较晚.结论 应加强对两部地区、父母文化程度较高以及家庭结构不完整的青少年的性教育.

Abstract：

Objective To describe the characteristics of sexual debut among college students in China to provide appropriate sex education in that population. Methods An anonymous questionnaire survey was conducted among 33 653 college students selected by multi-stage stratified cluster sampling method in 18 provinces and cities of China. Results The percentage of students who had initiated sexual intercourse before age 14 was 1.9%. Overall, male students (2.8%) were significantly more likely to have initiated sexual intercourse before age 14, than female students (1.1%). The percentage of students who had initiated sexual intercourse from age 15 to 18 was 6.4% in males versus 2.1% in females. while the rates of students who had initiated sexual intercourse after age 19 were 6.9% in males and 2.6% in females. The first sexual intercourse was significantly associated with parental educational attainment, geographic location and family structure. Students whose parents were relatively well educated, living in the western areas of the country China, or with nucleus/extensive families were more likely to have early sex in their puberties. Conclusion Sexual education should be strengthened especially in the western areas, and targeted on the students whose parents with relatively higher educational background or who were from extensive families.     

男性同性恋、男性同性性行为与艾滋病

20世纪80年代初,艾滋病(AIDS)首先在美国的男性同性恋人群中开始流行,从此AIDS的防治与男性同性恋人群紧密地联系在一起。那么AIDS到底和男性同性恋的联系怎样呢?是否男同性恋者一定会感染艾滋病病毒(HIV)呢?1对男同性恋的认识1.1男同性恋的存在由来已久同性恋是一个客观存在的事实,“同性恋(homo-sexuality)”这一名词是德国医生Benkert于1869年创造的。这个词描述的是对异性不能做出性反应,却被与自己性别相同的人所吸引。今天,同性恋、异性恋和双性恋都已被认为是不同类型的“性取向”,尽管对其定义的表述各有不同,但多数认为是“…     

男男性行为者的性病感染与控制

男男性行为者（MSM）人群处于社会生活边缘,艾滋病打破了这个群体的掩蔽状态,也促进了公共卫生事业新理念、新思维的形成和发展。 1同性性行为与同性恋 “中国当代性文化——中国两万例‘性文明’调查报告”中统计,同性性行为的发生率,大学生为7．5％,农村已婚者为2．3％,城市已婚者为0．5％。“当代中国人的性行为和性关系”认为在20～64岁的中国人中,有2．0％的男性认为自己是同性恋者,女性为0．7％;认为自己愿意与同性别人过性生活的男性为1．9％,女性0．6％。在男性中1．3％的人承认自己在一生中曾经与同性发生过超过接吻的性行为,而女性为0．4％。“性爱十年：全国大学生性行为的追踪调查”对同性性行为的调查结果显示,男、女生每次调查结果的统计比较没有显著性差异,发生年龄段也同样没有显著性差异（图1）。     

男男性行为的历史文化背景及现状

同性恋一词（Homosexuality）最初由1名匈牙利人1869年在文学作品中使用,后被德国学界接纳并被翻译成英文。这个词描述的是对异性不能做出性反应,却被自己同性别的人所吸引。今天,同性恋、异性恋和双性恋被认为是不同类型的“性取向”。男性同性性行为是指男性之间发生的性行为,男男性接触者（MSM）是指曾与男性发生过性行为的男性,包括男同性恋者、男双性恋者和部分男异性恋者,MSM范围要比男同性恋者广泛得多。     

Osteoporosis in men

With the prolongation of life expectancy, osteoporosis has become an increasing problem in the majority of developed countries worldwide. The paper discusses the frequency, pathogenesis, diagnostic criteria and treatment options for osteoporosis in men. Every third hip fracture occurs in men, and more than 11% of the male population over the age of 50 years suffer the fracture. Diagnostic tests for idiopathic osteoporosis are performed in men under 60 years of age without other potential risk factors of developing the disease. In the majority of cases, their low bone mineral density (BMD) is caused by a low peak bone mass. Secondary osteoporosis occurs in about 30 % of men, and involutionary osteoporosis developed in men over 60 years of age results from their decreased testosterone and IGF-1 levels. The study results showing that BMD levels in both sexes provide similar fracture risk information suggest that the existing diagnostic criteria for female osteoporosis can also be employed in men. It has been proved that biphosphonate and teriparitide therapy significantly increase BMD levels in men. The administration of androgens has been shown to be effective in men with hypogonadism, although their validity for patients with eugonadism has not yet been discussed. An improved knowledge of the bone metabolism and bone remodelling has recently opened the door to an extensive series of molecules that may play a key role in the treatment of male osteoporosis in the future.