Effectiveness of HIV prevention in Ontario, Canada: a multilevel comparison of bisexual men

Multi-level intersectional stigma reduction intervention to increase HIV testing among men who have sex with men in Ghana: Protocol for a cluster randomized controlled trial

BACKGROUND

Men with have sex with men (MSM) in Africa face high levels of stigma due to elevated HIV exposure (actual or perceived), same-sex practices, and gender non-conformity. These stigmas are documented barriers to HIV prevention and treatment. Most stigma-reduction interventions have focused on single-level targets (e.g., health care facility level [HCF]) and addressed one type of stigma (e.g., HIV), without engaging the multiple intersecting stigmas that MSM encounter. Determining the feasibility and acceptability of multi-level intervention of reducing intersectional stigma and estimating its efficacy on increasing HIV testing are needed.

METHODS

We proposed a mixed method study among MSM in Ghana. First, we will develop the intervention protocol using the Convergence Framework, which combines three interventions that were previously implemented separately in Ghana for reducing stigma at the HCF-level, increasing HIV testing at the peer group-level, and increasing peer social support at the individual-level. Then, we will conduct a cluster randomized controlled trial with four pairs of HCFs matched on staff size. HCFs within each pair are randomized to the HCF-level stigma-reduction intervention or control arm. MSM (n = 216) will be randomized to receive the group-level and individual-level interventions or standard of care control arm. MSM will be assigned to receive HIV testing at one of the HCFs that match their study assignment (intervention or control facility). The frequency of HIV testing between MSM in the study arms at 3 and 6 months will be compared, and the predictors of HIV testing uptake at the HCF, peer group and individual-levels will be assessed using multi-level regression models.

DISCUSSION

These findings from this study will provide important evidence to inform a hybrid implementation-effectiveness trial of a public health intervention strategy for increasing HIV case detection among key populations in sub-Saharan African communities. Accurate information on HIV prevalence can facilitate epidemic control through more precise deployment of public health measures aimed at HIV treatment and viral load suppression, which eliminates risk of transmission.

TRIAL REGISTRATION

This study was prospectively registered on ClinicalTrials.gov, Identifier: NCT04108078, on September 27, 2019.

Economic Evaluation of Community-Based HIV Prevention Programs in Ontario: Evidence of Effectiveness in Reducing HIV Infections and Health Care Costs

Investments in community-based HIV prevention programs in Ontario over the past two and a half decades are assumed to have had an impact on the HIV epidemic, but they have never been systematically evaluated. To help close this knowledge gap, we conducted a macro-level evaluation of investment in Ontario HIV prevention programs from the payer perspective. Our results showed that, from 1987 to 2011, province-wide community-based programs helped to avert a total of 16,672 HIV infections, saving Ontario's health care system approximately $6.5 billion Canadian dollars (range 4.8-7.5B). We also showed that these community-based HIV programs were cost-saving: from 2005 to 2011, every dollar invested in these programs saved about $5. This study is an important first step in understanding the impact of investing in community-based HIV prevention programs in Ontario and recognizing the impact that these programs have had in reducing HIV infections and health care costs.

HIV risk behaviors among a sample of heterosexually identified men who occasionally have sex with another male and/or a transwoman

Discordance between sexual identity and sexual behavior is not new; however, little is known about the HIV risk behaviors of heterosexually identified men who have occasional sex with a male and/or a male-to-female transgender woman. Open-ended qualitative interviews were conducted with 31 heterosexually identified men who reported at least one sexual encounter with a male and/or a transwoman in the previous 12 months. Sixty-one percent were African American/Black, the mean age was 38.9 years (SD = 8.4), 58.1% reported current substance use, and 58.1% were HIV infected. Among those who had a sexual encounter with a transwoman, the majority (81.3%) were the insertive partner during anal sex. In comparison, among those who had a sexual encounter with a male partner, almost one-half (42.9%) were the receptive partner during anal sex. HIV-infected participants were more likely to use a condom with a biological female partner than with a male or transwoman partner. HIV-uninfected participants reported limited condom use with any partner type, highlighting their potential role in the diffusion of HIV and other sexually transmitted infections. Participants' HIV status, partner type, substance use, and cultural factors influenced sexual decision-making and HIV risk behaviors.

Neighborhood-level correlates of consistent condom use among men who have sex with men: a multi-level analysis

There is growing evidence that the neighborhood environment influences sexual behavior and related outcomes, but little work has focused specifically on men who have sex with men (MSM). Using interview data from a probability sample of 385 young MSM living in New York City, recruited at public venues in 1999 and 2000 as part of the Young Men's Survey-New York City, and data on neighborhood characteristics obtained from the U.S. Census 2000, we conducted multi-level analyses of the associations between neighborhood-level characteristics and consistent condom use during anal intercourse, while controlling for individual-level sociodemographic and other factors. After adjusting for individual-level factors, neighborhood-level gay presence remained significantly and positively associated with consistent condom use during anal intercourse. This finding suggests that neighborhoods with a significant gay presence may have norms that act to discourage high risk sexual activity.

Beyond the Down Low: sexual risk, protection, and disclosure among at-risk Black men who have sex with both men and women (MSMW)

Little information is available about sexual risk, protective, and disclosure practices among Black bisexually active men and how these may be amenable to intervention when necessary. In-depth interviews were conducted with 30 at-risk urban Black men who have sex with both men and women (MSMW). Participants reported protecting themselves and their partners through routine HIV testing, using condoms consistently, engaging in strategic positioning during sexual activity, and limiting the number of sexual partners. In addition, they described several reasons for not using protection, including not having condoms available, enjoying sexual activity more without condoms, and perceiving female partners to be "safer" than male partners. Disclosure of bisexuality was complex and reportedly difficult, in particular to female and gay-identified male partners. Future interventions must not only build protection and disclosure skills among MSMW, but also increase broader social awareness and acceptance of male bisexuality.

Sexual risk behaviors of HIV-positive, HIV-negative, and serostatus-unknown Black men who have sex with men and women

Black men who have sex with men and women (MSMW) are at high risk for HIV infection and transmission. This study compared the sexual risk behaviors of Black MSMW who self-reported being HIV-positive with those who reported being HIV-negative and those who did not know their HIV status. Respondent-driven sampling (RDS) was used to recruit 1,154 Black MSM in Philadelphia and New York who completed an audio computer-assisted self-interview (ACASI). Of these men, 212 had engaged in anal sex with male partners and vaginal or anal sex with female partners in the past 3 months. A quarter (23.6%; n = 50) of MSMW self-reported testing positive for HIV at their last test, 59.4% (n = 126) reported testing negative for HIV at their last test, and 17.0% (n = 36) reported never having an HIV test. Multivariate logistic regression analysis revealed that HIV-positive MSMW were much less likely than HIV-negative men and never-tested men to have engaged in unprotected intercourse with main male and main female partners perceived to be HIV-negative or of unknown serostatus. However, HIV-positive men were equally as likely as HIV-negative men to have unprotected intercourse with non-main male and non-main female partners perceived as HIV-negative or of unknown serostatus. Our findings indicate that some HIV-positive MSMW engage in unprotected sex that places female and male partners at risk for HIV infection. However, MSMW who have never taken an HIV test, or who have not been recently tested, may be a greater source of HIV transmission to their female and male partners.

Determinants of Zambian men's extra-marital sex: a multi-level analysis

Research interest in extra-marital sex has increased as scholars have become aware of its role in sustaining epidemics of STDs in sub-Saharan Africa and elsewhere. While most research has used the socioeconomic and demographic features of individuals as determinants of extra-marital sexual behavior, this study examined the role played by community characteristics. Using data from the 2003 Zambian Sexual Behavior Survey for a sample of 1,118 men aged 15-59 and multilevel logistic regression techniques, the study analyzed the effects of community social and demographic characteristics on involvement in extra-marital sex while controlling for the men's individual-level characteristics. Men's involvement in extra-marital sex was found to vary with the characteristics of communities. The chances of men's involvement in extra-marital sex increased with community-level ethnic heterogeneity and urbanization, decreased in commercial centers, and in communities with a demographic surplus of males, health workers active in AIDS prevention, and access to the mass media. These results show that scholars trying to understand the motivations for extra-marital sex must pay attention to the characteristics of both individuals and communities.

Effectiveness of an HIV prevention program for secondary school students in Mongolia

PURPOSE

To evaluate the effectiveness of a 3-year human immunodeficiency virus (HIV) prevention program for adolescents attending secondary school in Mongolia.

METHODS

Comparisons of knowledge, attitudes, self-efficacy and safe sex practices of grade 10 students from schools with a peer education prevention program to grade 10 students from schools without the intervention. Peer education programs were launched in 2000 across Mongolia. In 2004, survey data was collected among 720 randomly selected students from eight schools with the peer education prevention program and compared with those of 647 students from eight schools without this intervention. Data was collected in Ulaanbaatar and three Mongolian provinces and analyzed using multilevel regression methods.

RESULTS

Students of schools with the program were statistically significantly more knowledgeable, had less traditional attitudes, and had greater awareness of their self-efficacy in regards to HIV and sexual health. Students from schools with the peer education program were more likely to practice safe sex, though the difference was not statistically significant. However, safe sex practice was found to be statistically significantly safer in a subset of schools that had small teams of peer educators.

CONCLUSION

Adolescents in Mongolia are sexually active and at risk for infection with HIV and other STIs. Peer education programs, particularly those that are managed by small teams, appear effective and should be implemented more broadly.

Population contextual associations with heterosexual partner numbers: a multilevel analysis

OBJECTIVE

The study examines whether an individual's sexual behaviour is associated with the demographic context within which they live.

METHODS

Data from a large behavioural survey were matched to the census and the number of opposite sex partners individuals reported having in the year before interview was modelled against a suite of individual characteristics and analogous characteristics for the population in which they lived.

RESULTS

The number of partners reported (none, one, two, three, or more) were variously associated with an individual's gender, age, marital status, sexual identity, and same sex activity in the previous year. Additionally, population age structure, sex ratio, and the proportion of the population reporting specific patterns of sexual activity were associated with the behaviour of individuals.

CONCLUSIONS

This study demonstrates that population context is associated with individual behaviour even after individual characteristics have been taken into account. This suggests that multilevel modelling of sexual behaviour data can provide new insights into the pattern of sexual behaviour.

ZIP code correlates of HIV-testing: a multi-level analysis in Los Angeles

In this study we examine how individuals' residential areas relate to their HIV-testing, regardless of individuals' characteristics. Data from a 1999 random probability sample of Los Angeles (LA) County adults (n = 5475) was used to conduct a multi-level analysis of HIV-testing among respondents in (1) all 233 ZIP codes and (2) the subset of regions with higher rates of higher-risk sex. Results showed that HIV-testing rates varied across individuals' residential ZIP codes. Throughout LA and in higher-risk regions, residents of areas containing concentrations of African Americans were more likely to test for HIV than residents of White or Latino areas, regardless of individuals' own race/ethnicity or the number of AIDS cases or testing sites in ZIP codes. However, residents of Latino areas were no more likely to test than residents of White areas. This is a concern because of increasing rates of HIV-infection among Latinos. We conclude that opportunities exist to increase testing in Latino higher-risk areas.

Effectiveness of school programs in preventing childhood obesity: a multilevel comparison

OBJECTIVES

In light of the alarming increase in childhood obesity and lack of evidence for the effectiveness of school programs, we studied the effects of school programs in regard to preventing excess body weight.

METHODS

In 2003, we surveyed 5200 grade 5 students along with their parents and school principals. We measured height and weight, assessed dietary intake, and collected information on physical and sedentary activities. We compared excess body weight, diet, and physical activity across schools with and without nutrition programs using multilevel regression methods while adjusting for gender and socioeconomic characteristics of parents and residential neighborhoods.

RESULTS

Students from schools participating in a coordinated program that incorporated recommendations for school-based healthy eating programs exhibited significantly lower rates of overweight and obesity, had healthier diets, and reported more physical activities than students from schools without nutrition programs.

CONCLUSIONS

Our finding that school programs are effective in preventing childhood obesity supports the need for broader implementation of successful programs, which will reduce childhood obesity and, in the longer term, comorbid conditions and health care spending.