具有同性性接触的男性调查

目的 了解有同性性接触男性的与可能传播艾滋病、性病有关的性行为。方法 采用自拟的问卷对35例有同性性接触男性进行调查。结果 所有被访者中口交发生率94.3％,肛交68.6％,吻肛28.6％;他们中71.4％有异性性接触。结论 口交和肛交在他们的性接触中占重要位置,应加强防病意识教育。     

Unmarried Latino Men who Report Sex with Men: Psychocultural and Demographic Characteristics

Latino men who have sex with other men are disproportionately affected by AIDS/HIV. We describe sociodemographic and psychosocial characteristics of a probability sample of 744 unmarried Latino men, comparing men reporting at least one sexual encounter with another man (MSM; 5.5% of sample) with men reporting sex exclusively with women (MSW) or reporting they were not sexually active (NSA). MSM were significantly older, more acculturated, and more educated than others. MSM were more comfortable with sexuality and reported over twice as many sexual partners in the previous year as MSW. MSM always used condoms with 83% of their multiple partners, compared to 50% of MSW. Homophobia and sexual discomfort among MSM may decrease self-efficacy to use condoms.     

Risk Factors Associated with HIV Among Men Who Have Sex Only with Men and Men Who Have Sex with Both Men and Women in Three Urban Areas in Mozambique

Using respondent-driven sampling (RDS), an integrated biological behavioral survey among men that have sex with men (MSM) enrolled 457 participants in Maputo [63.0 % were MSM who had sex with women (MSMW)], 538 in Beira (36.2 % MSMW) and 330 in Nampula-Nacala (54.8 % MSMW) in 2011. Analysis suggests that MSM who have sex only with men (MSMO) had increased odds of having HIV (aOR 2.7) compared to MSMW. HIV among MSMO associated with age, self-reported STI (aOR 4.2), having a single male anal partner (aOR 3.8) and having transactional sex with a man (aOR 3.5) in the past year. Among MSMW, HIV associated with age, lower education (aOR 32.5), being uncircumcised (aOR 3.1) and having transactional sex with a woman (aOR 6.0) in the past year. Findings confirm that MSMO and MSMW have distinct HIV risks in Mozambique; HIV programs for MSM in Southern Africa should take such differences into consideration.     

Longitudinal Physical Activity Changes in Older Men in the Osteoporotic Fractures in Men Study

OBJECTIVES: To describe the change in physical activity (total, leisure, household, occupational) in men over a mean 5‐year follow‐up period and to identify sociodemographic and health factors associated with change in physical activity. DESIGN: Prospective cohort study; Osteoporotic Fractures in Men Study; data collected March 2000 through May 2006. SETTING: Six U.S. clinical centers. PARTICIPANTS: Volunteer sample of ambulatory community‐dwelling men aged 65 and older (N=5,161). MEASUREMENTS: Self‐reported physical activity assessed at baseline and Visit 2 (V2) (5 years apart) according to the Physical Activity Scale for the Elderly (PASE) (unitless, relative measure of physical activity). RESULTS: At baseline, PASE scores averaged 16.8±35.5 for occupational, 37.0±34.0 for leisure, 95.9±43.2 for household, and 149.7±67.6 for total physical activity. Occupational (?6.2±33.9), leisure (?3.2±37.3), household (?9.9±44.3), and total (?19.3±67.7) physical activity change scores declined, on average, from baseline to V2. On average, change in total PASE scores declined more with age: ?15.6±71.6 for men younger than 70, ?16.4±67.0 for men aged 70 to 74, ?21.4±66.9 for men aged 75 to 79, and ?29.5±60.7 for men aged 80 and older. Living alone, smoking cigarettes, poor health, and higher blood pressure were associated with greater declines in physical activity over time. Although average scores declined, some older men (1,335, 26%) reported increasing physical activity levels. Better physical and mental health, living with others, and being younger were associated with the probability of increasing physical activity over time. CONCLUSION: Over the 5‐year period, the majority of men reported declines in total physical activity. Older men in poor health who live alone have a high risk of physical activity declines and may be an important group to target for exercise interventions.     

Alcoholism in Young Men

This study compares the characteristics of groups of younger (age 25 or less) and older men hospitalized for alcoholism in calendar years 1966-1969 and 1970-1971. While the percentage of young alcoholics increased from 28 to 43 between the two time samples, such an increase does not necessarily indicate a higher prevalence of alcoholism among young Navy men, although this possibility merits further study. Most young men who drink heavily do not become alcoholic, and many may have underlying character and behavior disorders and poor prognoses.     

Partner Characteristics and Undiagnosed HIV Seropositivity among Men Who Have Sex with Men Only (MSMO) and Men Who Have Sex with Men and Women (MSMW) in Baltimore

This study examined the relationship between HIV risk behaviors, partner characteristics, and undiagnosed seropositivity among men who have sex with men and women (MSMW) and men who have sex with men only (MSMO). BESURE-MSM2 is a venue-based cross-sectional HIV surveillance study conducted among MSM in 2008. Stratified log-binomial regression was used to assess adjusted prevalence ratios of undiagnosed seropositivity among 103 MSMW and 296 MSMO (N = 399). Among MSMO, race/ethnicity, age, having had a sexually transmitted infection, concurrency, and having a black/African American male partner were associated with undiagnosed seropositivity. Among MSMW, having five or more male partners, having a main male partner, and having a main female partner were associated with undiagnosed seropositivity. Our findings underscore the importance of partner characteristics in understanding HIV transmission. HIV programs for men with both male and female partners are needed to address the unique partnership dynamics of MSMW.     

High Rates of Sex with Men among High-Risk,Heterosexually-Identified Men in Low-Income,Coastal Peru

In this paper we describe sex with men, including the frequency of sex and unprotected sex, among high-risk, heterosexually-identified men in urban, low-income, coastal Peru. During 2001–2002, a random community-based sample of these men was administered an epidemiologic survey collecting sexual risk behavior data. Among the 924 high-risk heterosexually-identified men, 131 (14.2%) reported at least one male partner in the past 6 months. Of these, 113 (86.3%) reported male and female partners and among those with partners of both sexes, 84.2% and 57.0% of sex acts with female and male partners, respectively, were unprotected, (RR 1.48, 95% CI = 1.31–1.68). We observed a high rate of recent bisexual behavior compared to past studies showing frequent, unprotected sex with male and female partners. This population has substantial potential to act as a bridge population between and their male and female partners and should be addressed by prevention programs. Previously published abstract: Konda, K.A., Fernandez, P. Klausner, J.D., Lescano, A.G., Leon, S.R., Caceres, C.F., and Coates, T.J. (2005). Heterosexually identified, socially marginalized men who report recent sex with men in Peru. In: Abstracts of the 16th biennial International Society for Sexually Transmitted Diseases Research (ISSTDR) (Amsterdam, Netherlands), MP-172.     

Sexual Behavior and HIV Testing Among Bisexual Men: A Nationwide Comparison of Australian Bisexual-Identifying and Gay-Identifying Men

Men who have sex with men (MSM) are typically studied as though they were a homogeneous population. This has resulted in a lack of knowledge about the sexual health and behavior of bisexual men as distinct from gay men. In this study, patterns of sexual behavior and rates of HIV testing were compared between 854 gay-identifying and 164 bisexual-identifying men who participated in an Australian nationwide online survey. Approximately half of both groups engaged in unprotected anal intercourse (UAI) at their most recent sexual encounter, but bisexual-identifying men were more likely to have had sex with a partner who was either serodiscordant or with whom their seroconcordance was unknown. Despite these patterns, only 62% of bisexual-identifying men had ever been tested for HIV compared to 84% of gay-identifying men. Multivariate logistic regression focused on rates of UAI and HIV testing among bisexual-identifying men. Patterns were similar across all age groups and educational backgrounds. However, bisexual-identifying men were less likely to engage in UAI with a casual partner and were more likely to have been tested for HIV if they had multiple partners or had disclosed their sexual orientation to their social networks. In all, these data reveal important differences between gay- and bisexual-identifying men, particularly with regard to HIV testing, and highlight a need for HIV prevention strategies to focus more strategically on finding ways of promoting safer sex and HIV testing among all MSM.     

Racial/Ethnic Differences in Seroadaptive and Serodisclosure Behaviors Among Men Who Have Sex with Men

We examined racial/ethnic differences in reported seroadaptive and serodisclosure behaviors among the partnerships of MSM recruited for a cross-sectional survey using time-location sampling (TLS) in San Francisco during 2007–2008. The sample (N = 1,199) consisted of 12.2% Asian/Pacific Islander (API), 52.4% White, 6.8% Black, 20.2% Latino, and 8.5% of “other” race/ethnicity. Pure serosorting was most common (about 20%) among HIV-negative men while seropositioning was most used (about 15%) by HIV-positive men. Reported seroadaptive behaviors did not differ significantly across races/ethnicities among both HIV-negative and HIV-positive men. However, HIV-positive Black and Latino men were significantly more likely to report no preventive, seroadaptive behavioral strategy (i.e., unprotected insertive anal intercourse with unknown status or serodiscordant partners). Among men who reported engaging in seroadaptive behaviors, they reported not discussing HIV status with a third of their partners—a major concern in that lack of disclosure undermines the effectiveness and means to practice serosorting. Partnerships of API and Black men were least likely to involve serodisclosure behaviors. Our study confirms that seroadaptive behaviors are common preventive strategies reported by MSM of all races/ethnicities, and does not find strong evidence that racial/ethnic differences in seroadaptive behaviors are enhancing disparities in HIV prevalence. The implications are that condom promotion and safe sex messages are not the only prevention measures adopted by MSM and that public health professionals should be well aware of current trends within the MSM community in order to better assist HIV prevention efforts.     

Testosterone in Chronic Alcoholic Men

Reduced testosterone levels in chronic alcoholic men may be associated with the age, alcohol consumption history, severity of liver injury, and nutritional status of these patients. In this study, total testosterone levels were measured in 163 alcoholic men upon admission to an alcohol treatment program (ATP) and at 3 months follow-up. Values of testosterone below the clinical normal range were found in over 17% of the subjects, a finding significantly predicted by age, alcohol consumption and liver injury tests. Follow-up at 3 months further demonstrated that abnormally low testosterone values significantly increased in men who remained abstinent as compared to those who continued to drink.     

Use of Geosocial Networking (GSN) Mobile Phone Applications to Find Men for Sex by Men Who Have Sex with Men (MSM) in Washington,DC

Current advances have added geosocial networking (GSN) mobile phone applications as an option for men who have sex with men (MSM) to meet other men. This is the first study to assess GSN application use and sex-seeking behaviors of MSM recruited using venue-based sampling. Among the 379 MSM in this study, 63.6 % reported using GSN applications to find men in the past year. Nearly one-quarter of MSM had sex with a man met using a GSN application in the prior year; these men were more likely to be under 35 years old and have had sex with a man met on the Internet; they were also less likely to be HIV-positive and have <5 male sex partners in the last year. GSN applications are a viable option for use in sampling and delivering interventions to young MSM who are often missed through other methods.     

Idiopathic or Hypogonadal Osteoporosis in Men

Osteoporosis is being recognized increasingly in men, and represents a substantial public health problem. As the male population ages and lives longer, the incidence of osteoporotic fractures is expected to increase. The current lifetime risk for a fragility fracture is approximately 27% in men aged 50 years or more, and will increase further over the next 20 years. A major problem with osteoporosis in men is that it continues to be unrecognized, and the majority of men with fragility fractures due to osteoporosis are not being treated. A higher level of awareness is required amongst both general practitioners and the general public that osteoporosis is a treatable condition that can affect men. Secondary causes for osteoporosis are more common in men than in women, and require rigorous exclusion and treatment. Undiagnosed clinical hypogonadism is a common cause of osteoporosis in men, and is readily treatable. The cause of primary osteoporosis in men is unknown, but it results in an osteoblast defect. Genetic factors are likely to be important. In some but not all men, relative estrogen deficiency contributes to rapid rates of age-related bone loss and fractures. An adequate calcium intake, regular weight-bearing exercise, and normal vitamin D status are all very important, particularly with increasing age. The role of testosterone in treating eugonadal men with osteoporosis is currently unclear, and larger prospective studies will be required to carefully evaluate the benefits and risks of therapy. First-line treatment of osteoporosis in hypogonadal or eugonadal men is with bisphosphonates. Alendronate increases bone density and reduces vertebral fractures measured using a semiquantitative method in eugonadal or hypogonadal men with osteoporosis. In the near future, it is likely that subcutaneous human parathyroid hormone (1-34) or teriparatide will also be available as an important new anabolic treatment for men with osteoporosis. Teriparatide treatment also increases bone density in men. Selective estrogen receptor modulating drugs require further evaluation in men, but would appear to theoretically benefit men, especially those with low estradiol levels. In the future, selective androgen receptor modulating drugs may be useful in the prevention and treatment of osteoporosis, and in increasing lean body mass in men, without having adverse effects on prostate and breast tissue.     

Unsafe Sex in the Primary Relationships of Puerto Rican Men Who Have Sex with Men

This paper focuses on the sexual behavior of Puerto Rican men involved in primary relationships with other men. The data are drawn from two separate and consecutive studies. The results of the first study show that those men who have both lovers and one-night stands (n = 67) are more likely to have unprotected anal sex (receptive and insertive) with their lovers regardless of HIV status. The qualitative data collected in the first study as well as the in-depth interviews of mixed status couples in the second study document that participants with adequate information, will power, and skills to protect themselves engage in risk behavior in the absence of external barriers to condom use. The wish for sexual pleasure and intimacy and the trust and love for the partner often overpower concerns about HIV transmission among coupled men. Cultural issues such as machismo and gender roles also have an impact. The need to devise prevention mechanisms that will not interfere with physical pleasure or intimacy is underscored.     

Correlates of Unprotected Vaginal or Anal Intercourse with Women Among Substance-Using Men Who Have Sex with Men

The role men who have sex with men and women (MSMW) play in heterosexual HIV transmission is not well understood. We analyzed baseline data from Project MIX, a behavioral intervention study of substance-using men who have sex with men (MSM), and identified correlates of unprotected vaginal intercourse, anal intercourse, or both with women (UVAI). Approximately 10 % (n = 194) of the men reported vaginal sex, anal sex, or both with a woman; of these substance-using MSMW, 66 % (129) reported UVAI. Among substance-using MSMW, multivariate analyses found unemployment relative to full/part-time employment (OR = 2.28; 95 % CI 1.01, 5.17), having a primary female partner relative to no primary female partner (OR = 3.44; CI 1.4, 8.46), and higher levels of treatment optimism (OR = 1.73; 95 % CI 1.18, 2.54) increased odds of UVAI. Strong feelings of connection to a same-race gay community (OR = 0.71; 95 % CI 0.56, 0.91) and Viagra use (OR = 0.31; 95 % CI 0.10, 0.95) decreased odds of UVAI. This work suggests that although the proportion of substance-using MSM who also have sex with women is low, these men engage in unprotected sex with women, particularly with primary female partners. This work highlights the need for further research with the substance using MSMW population to inform HIV prevention interventions specifically for MSMW.     

Reducing AIDS Risk Among Men Who Have Sex with Men in Salvador, Brazil

Even though men who have sex with men (MSM) continue to account for a high proportion of AIDS cases in Brazil, relatively few prevention programs have been designed for them. We developed, implemented, and measured the impact of such a program in Salvador, Bahia, Brazil. This prospective cohort study used pre–post comparison to evaluate the impact of an intervention. We interviewed a cohort of 227 men recruited through snowball sampling before and up to 6 months after participating in brief AIDS prevention interventions. Knowledge and attitudes measures of HIV/AIDS and safer sex practices were raised and reported AIDS sexual risk behaviors declined after the intervention (all p values <.001). The proportion of men reporting unprotected anal intercourse in the prior month fell from 19% before the intervention to 1% after it. This study suggests that AIDS prevention activities designed for MSM in similar settings can be feasible and effective. More such prevention programs are urgently needed for MSM in developing countries such as Brazil.     

Correlates of Bisexual Behaviors Among Men who have Sex with Men in El Salvador

Bisexual behaviors may increase transmission pathways of HIV and sexually transmitted infections (STIs) from a higher prevalence group to lower prevalence groups in El Salvador. In 2008, men who have sex with men (MSM) were recruited in San Salvador and San Miguel using respondent driven sampling. Participants were interviewed and tested for HIV and STIs. Sixteen seeds and 797 MSM participated; 34.9% in San Salvador and 58.8% in San Miguel reported bisexual behavior. Bisexual behavior was associated with drug use (adjusted odds ratio (AOR) = 2.57, 95% CI: 1.30–5.06) and insertive anal sex (AOR = 5.45, 95% CI: 3.01–9.87), and inversely associated with having a stable male partner (AOR = 0.47, 95% CI: 0.26–0.84) and disclosing MSM behavior to family (AOR = 0.41, 95% CI: 0.22–0.75). Bisexual behavior was associated with risk behaviors with male and female partners that may be associated with HIV and STI transmission. Bisexual men displayed a distinct identity calling for tailored interventions.     

Adapted Personalized Cognitive Counseling for Episodic Substance-Using Men Who Have Sex with Men: A Randomized Controlled Trial

Episodic drug use and binge drinking are associated with HIV risk among substance-using men who have sex with men (SUMSM), yet no evidence-based interventions exist for these men. We adapted personalized cognitive counseling (PCC) to address self-justifications for high-risk sex among HIV-negative, episodic SUMSM, then randomized men to PCC (n = 162) with HIV testing or control (n = 164) with HIV testing alone. No significant between-group differences were found in the three primary study outcomes: number of unprotected anal intercourse events (UAI), number of UAI partners, and UAI with three most recent non-primary partners. In a planned subgroup analysis of non-substance dependent men, there were significant reductions in UAI with most recent non-primary partners among PCC participants (RR = 0.56; 95 %CI 0.34–0.92; P = 0.02). We did not find evidence that PCC reduced sexual risk behaviors overall, but observed significant reductions in UAI events among non-dependent SUMSM. PCC may be beneficial among SUMSM screening negative for substance dependence.     

Nonsupportive Peer Norms and Incarceration as HIV Risk Correlates for Young Black Men who have Sex with Men

Black men who have sex with men (BMSM) are at considerable risk for HIV infection. A convenience sample of BMSM (n = 252) attending nightclubs in three North Carolina cities was surveyed to investigate factors associated with unprotected anal intercourse (UAI). About 45% reported UAI in the past 2 months. BMSM who strongly agreed that their male friends used condoms for anal sex were significantly less likely to report any UAI. Recently incarcerated men were significantly more likely to report unprotected insertive anal sex. In secondary analyses, men who reported experiencing discrimination based on their race and nongay identified men reported more favorable peer norms for condom use. Men who reported that their family disapproved of their being gay were more likely to have been incarcerated in the past 2 months. HIV prevention for BMSM must promote supportive peer norms for condom use and address incarceration, racial discrimination, and family disapproval.     

Attributions About One's HIV Infection and Unsafe Sex in Seropositive Men Who Have Sex With Men

This study of 71 sexually active HIV-positive men who have sex with men found that the likelihood of engaging in unprotected anal intercourse (UAI) with partners at risk for HIV was directly associated with the strength with which the men attributed blame and responsibility for their HIV infection to other persons. Men who believed that another person intentionally tried to infect them were at especially high risk for engaging in UAI. Self-attributions were not associated with sexual risk behavior. Conceptual explanations and directions for future research are discussed.     

Self-Perceived Responsibility of HIV-Seropositive Men Who Have Sex with Men for Preventing HIV Transmission

Relatively little attention has been paid to unique factors that may motivate HIV-seropositive men who have sex with men (MSM) to prevent HIV transmission. This study examines the beliefs of 250 HIV-seropositive MSM about their responsibility for protecting sex partners from HIV infection. Participants completed an open-ended interview about their sexual practices, substance use, and other HIV-related issues. Seventy percent of participants were men of color. Most participants (72%) spontaneously mentioned issues related to responsibility that were represented by three themes: (1) personal responsibility for protecting sex partners, (2) partners' responsibility for protecting themselves, and (3) mutual responsibility. These beliefs were expressed by 63%, 24%, and 12% of respondents, respectively. Motivations underlying beliefs about personal responsibility included altruism, self-standards, and self-interest. Beliefs about personal responsibility were influenced by participant characteristics, partner characteristics, disclosure of HIV status, and contextual factors. The findings suggest that self-perceived responsibility may be an important factor that affects HIV-seropositive MSM's sexual decision making.