Identifying and characterizing places for the targeted control of heterosexual HIV transmission in urban areas

Objective Neighborhood-Level Disorder Versus Subjective Safety as Predictors of HIV Transmission Risk and Momentary Well-Being

Mental health and HIV risk behavior have been studied with ecological momentary assessment (EMA), but this approach has not been combined with tracking of activity space (where people go and what they encounter there) in people with HIV and their social relations, who may be HIV+ or HIV-. Activity space represents a modifiable risk or protective factor for behavior related to health status and quality of life, in both clinical and nonclinical populations. We conducted an observational study with 286 participants (243 HIV+ and 43 HIV-), roughly matched for socioeconomic status and neighborhood of residence via three waves of snowball sampling. Each participant carried a smartphone for up to 4 weeks, making 5 randomly prompted entries and 1 end-of-day entry each day, plus self-initiated event-contingent entries for sexual activity and drug use. Responses to randomly prompted items provided subjective evaluations of the safety of the participant's current social and physical environment (the place they were and the people they were with). GPS-based location tracking-coupled with publicly available statistic indicating neighborhood-level physical disorder and socioeconomic disadvantage-provided an indicator of each participant's exposure to objective psychosocial hazard. We examined possible relationships of these objective and subjective environmental exposures with risky sexual and intravenous drug-use behavior, knowledge and utilization of antiretroviral treatment and prophylaxis, and momentary mental health (mood and stress, which relate to risky behavior and overall well-being). We found that both risky behavior and mental health were more related to participants' subjective evaluations of their activity space than to objective measures of neighborhood-level disorder, suggesting that, even within an objectively hazardous neighborhood, people who find a niche they perceive as socially and physically safe may engage in less risky behavior and have better well-being.Trial registration Clinicaltrials.gov Identifier NCT01571752.

Social venues and HIV vulnerability of young venue workers: a cluster analysis of data from a national-level cross-sectional survey of social venues in Uganda

OBJECTIVE

Venues where people socialize, such as bars, play a significant role in HIV transmission risk. However, little research has been done that identifies characteristics of high-risk venues, to inform HIV prevention efforts. This study identified clusters of social venues in Uganda and their relationship with HIV vulnerability of young venue workers (15-24 years). We also assessed availability of HIV prevention services at the venues.

DESIGN AND SETTING

This was a secondary analysis of data from a larger cross-sectional survey of social venues in 25 districts of Uganda.

PARTICIPANTS

A total of 480 venues that employed young workers were included in this study.

ANALYSIS

Hierarchical cluster and mixed-effects regression analyses were conducted.

RESULTS

Four clusters were adopted: cluster 1 represented 127 venues (mainly alcohol-serving sex work venues with a provision of on-site sex); cluster 2 represented 80 venues (mainly alcohol-serving sex work venues without a provision of on-site sex); cluster 3 represented 113 venues (mainly alcohol-serving venues without sex work or on-site sex); and cluster 4 represented 160 venues (non-alcohol-serving venues). We found a positive correlation between venue clusters and HIV vulnerability. Workers who belonged to cluster 1 (alcohol-serving sex work venues with a provision of on-site sex) had a 0.15 increase in HIV vulnerability compared with those in alcohol-serving venues without sex work or a provision of on-site sex (cluster 3) (coefficient: 0.15, 95% CI: 0.030 to 0.287) after adjusting for age, sex and marital status. Thirty-seven per cent of cluster 1 venues reported any HIV prevention services in the past 12 months.

CONCLUSION

Alcohol-serving sex work venues with a provision of on-site sex (cluster 1) appeared to reinforce vulnerability to HIV in this study and should be targeted with HIV prevention interventions. Such venues can amplify HIV transmission by facilitating sexual partner coupling and on-site sex.

Safe Spaces 4 Sexual Health: A Status-Neutral, Mobile Van, HIV/STI Testing Intervention Using Online Outreach to Reach MSM at High Risk for HIV Acquisition or Transmission

BACKGROUND

Black men who have sex with men (MSM) carry the greatest burden of new HIV diagnoses in the United States. Ending the HIV epidemic requires strategic, culturally specific approaches to target factors contributing to persistent HIV disparities.

SETTING

Safe Spaces 4 Sexual Health (SS4SH), a community-informed HIV/sexually transmitted infection (STI) testing strategy combining mobile van testing with online outreach, was implemented over a 14-month period from 2018 to 2019 in Baltimore, MD.

METHODS

We evaluated the reach of MSM at high risk with high acquisition or transmission risk by SS4SH mobile van combined with online outreach as compared with the Baltimore City Health Department's venue-based mobile van (with no online outreach) operating during the same period based on the following HIV/STI testing outcome measures: (1) number of MSM HIV or STI tested, (2) new HIV diagnosis rate, (3) percent with new syphilis diagnosis, (4) percent at high risk for HIV acquisition, and (5) percent people living with HIV at high risk for transmission.

RESULTS

Over a 14-month period, SS4SH HIV/STI tested 151 MSM. Of these, 74% were Black and the mean age was 34 (SD = 10, range = 19-68). Seven percent (10/148) were new HIV diagnoses, and 10% (13/130) were diagnosed with syphilis. The Baltimore City Health Department's venue-based mobile van strategy yielded 53% (231) more MSM (71% Black, mean age 38, SD = 14, range = 15-74), but the HIV/syphilis positivity rate was significantly lower: 0.5% new HIV diagnosis rate (P < 0.001) and 0.5% with syphilis diagnosis (P < 0.001).

CONCLUSIONS

Our findings suggest SS4SH combing online outreach with mobile van testing may be more effective at reaching high-risk Black MSM than venue-based mobile testing.

Social place as a location of potential core transmitters-implications for the targeted control of sexually transmitted disease transmission in urban areas

PURPOSE

Places are an important determinant of risk for sexually transmitted infection (STI) acquisition and transmission. We sought to identify social places that are critical for targeted STI control activities. The objective of this study was to determine whether sex partner meeting places characterized by drug markets, sex markets, and separately, drug and/or sex markets were more likely to have potential core transmitters as compared with other sex partner meeting places in one urban setting.

METHODS

In 2008-2009, heterosexual sex partner places or venues were identified in Baltimore, MD using a venue-based study approach.

RESULTS

A total of 1334 participants aged 18 to 35 years were enrolled at 85 venues. In those participants, 39 potential core transmitters were identified and 31% of venues had at least one potential core transmitter. In final age-adjusted and gender-adjusted models, core transmitters were significantly more likely to be identified at drug markets (OR = 1.37; 95% CI = 1.23-1.53), sex markets (OR = 1.27; 95% CI = 1.14-1.41), and drug and/or sex markets (OR = 1.49; 95% CI = 1.32-1.68).

CONCLUSIONS

This study identified key characteristics of venues, such as drug and sex market activity, that may be important in identifying places for the targeted control of STI transmission.