HIV seroprevalence in a facility for runaway and homeless adolescents

Demographics of Youth With Newly Diagnosed Acute/Recent HIV Infection in Adolescent Trials Network 147: Early Treatment of Acute HIV Infection

PURPOSE

Gay, bisexual, and other cisgender men who have sex with men, and racial minority youth are at elevated risk of acquiring HIV infection. The Adolescent Trials Network 147 recruited youth with acute/recent HIV-infection for early antiretroviral treatment. The cohort make-up is described here.

METHODS

Treatment-naïve, recently identified HIV + youth, aged 12-24 years, from Los Angeles and New Orleans were recruited from community centers, clinics, social media, and a high-risk seronegative cohort (n = 1,727, the Adolescent Trials Network 149) using point-of-care assays. Acute HIV infection was determined by Fiebig staging. HIV RNA viral load (VL) and CD4 cell counts, along with demographic and behavioral data were assessed at enrollment.

RESULTS

Between July 2017 and July 2021, 103 newly diagnosed youth were enrolled, initiating antiretroviral treatment within a week. Mean age was 20.8 years (standard deviation: 2.4); 90.3% identified as cis male, 83.5% were single or in casual relationships, 71.8% were gay, bisexual, and other cisgender men who have sex with men; 60.2% were Black. One-fourth (24.3%) reported homelessness ever; 10.7% within last 4 months. At enrollment, median plasma VL was 37,313 HIV RNA copies/ml (interquartile range: 5,849-126,162) and median CD4 count 445.5 cells/mm3 (interquartile range: 357-613). 40% of youth reported acute retroviral symptoms before or at enrollment. Acutely infected, seroconverting youth had the highest VL. Sexually transmitted coinfections were present at enrollment in 56% of the cohort, with syphilis being most frequent (39%).

DISCUSSION

Early identification and treatment of HIV can increase positive HIV outcomes. A high sexually transmitted infection burden was present in recently HIV-infected youth. Acute retroviral symptoms were not reported by most participants, demonstrating that broad universal HIV screening is needed for identification of recent infection in youth.

Young Transgender Women of Color: Homelessness, Poverty, Childhood Sexual Abuse and Implications for HIV Care

This study describes a sample of HIV+ young transgender women of color aged 18-24 and their experience with homelessness as part of a demonstration project of engagement and retention in HIV medical care funded by Health Resources and Services Administration. The study engaged transgender women of color in HIV care in nine sites across the US between 2012 and 2017. This analysis describes and compares transwomen who had been homeless in the last 6 months to those not homeless. We hypothesized that homelessness would compete with HIV care, food, shelter, and be associated with poverty. Variable domains included sociodemographic, mental health and substance use, HIV care, sexual risk behavior, social support from transgender and other friends, and childhood sexual abuse. There were 102 youth enrolled, 77 (75.5%) who had been homeless, and 25 (24.5%) who had not been homeless. Bivariate analyses showed that low income, sex work as source of income, inability to afford food, lack of viral load (VL) suppression, childhood sexual abuse, lower levels of social support, and higher levels of depression were associated with homelessness. A logistic regression model showed that being unable to afford food (AOR = 9.24, 95% CI 2.13-40.16), lack of VL suppression in last 6 months (AOR = 0.10, 95% CI .02-.57), and lack of transgender friend support (AOR = 0.09, 95% CI .02-.53) was associated with homelessness. Programs that place basic needs first-food and shelter-may be able to engage and assist young transgender women of color with HIV to survive and live healthier lives.

Smartphone application plus brief motivational intervention reduces substance use and sexual risk behaviors among homeless young adults: Results from a randomized controlled trial

Homeless young adults are more likely than their never-homeless counterparts to abuse substances and engage in sexual risk behaviors. This study evaluated the feasibility and preliminary effectiveness of OnTrack, a smartphone application to self-monitor substance use and sexual risk behaviors, plus a brief motivational intervention (BMI), in reducing substance use and sexual risk among homeless young adults. A randomized controlled pilot trial (N = 60) compared OnTrack + BMI to treatment as usual (TAU) at an inner-city crisis shelter for homeless young adults (aged 18-21 years). Participants were assessed at baseline and 2 weeks, 4 weeks, and 6 weeks after baseline to evaluate substance use and sexual risk behaviors. Kruskal-Wallis tests determined differences between baseline and postintervention assessments. Logistic regression models examined treatment effect on change in outcomes between baseline and postintervention follow-up assessment, controlling for baseline levels. Participants in OnTrack + BMI significantly reduced past 2-week number of drinks (p = .023), times used marijuana (p = .046), times engaged in unprotected sex (p = .012), and times used drugs before sexual activity (p = .019). No reductions of substance use or sexual risk behaviors were found among participants in TAU (all ps > .05). After adjusting for baseline levels of substance use and sexual risk, participants in OnTrack + BMI had significantly lower odds than those in TAU for drinking alcohol (adjusted OR = 0.14; p = .01) and having unprotected sex (adjusted OR = 0.151; p = .032). OnTrack + BMI is feasible and effective in reducing past 2-week alcohol use and unprotected sex among homeless young adults. A larger randomized trial is warranted to replicate and extend present results. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Factors Associated With HIV Testing Among Atlanta's Homeless Youth

Homeless youth experience increased risk of contracting HIV, making HIV testing imperative in this population. We analyzed factors associated with HIV testing among homeless youth in Atlanta, Georgia using data from the 2015 Atlanta Youth Count and Needs Assessment. The analysis included 693 homeless youth aged 14-25 years, of whom 88.4% reported ever being tested for HIV, and 74.6% reported being tested within the previous year. Prevalence of ever testing for HIV was significantly higher among youth who reported risk factors for HIV (sexually active, transactional sex, or ever having an STI). Higher prevalence of testing within the last year was significantly associated with experiencing physical abuse or transactional sex. However, reporting ≥ 4 sexual partners or not using condoms were not associated with higher testing. Although testing prevalence among homeless youth was high, homeless youth engaging in certain high risk behaviors could benefit from further promotion of HIV testing.

Safer Sex Communication and Sexual Health Behaviors Among a Representative Statewide Sample of Homeless Adolescents

Homeless adolescents are at substantial risk of human immunodeficiency virus (HIV), other sexually transmitted infections (STIs), and unplanned pregnancy; however, little research has assessed factors, such as safer sex communication, that may protect homeless adolescents against these negative outcomes. Using the 2015 North Carolina Youth Risk Behavior Survey (YRBS; unweighted N = 5,486; ages 12 to 18; 5% homeless), we compared homeless adolescents' primary safer sex communication sources (i.e., health care providers, parents, teachers, peers, religious leaders) to housed adolescents' communication sources and assessed how these sources relate to sexual health behaviors, including condom use, HIV testing, and number of sexual partners. Most homeless adolescents (61%), and 46% of housed adolescents reported having questions about sex. Further, twice as many homeless adolescents communicated primarily with health care providers compared to housed adolescents. Importantly, among homeless adolescents, communicating primarily with health care providers or teachers was related to greater likelihood of condom use and communicating primarily with religious leaders was related to greater likelihood of HIV testing. Parent communication was unrelated to homeless adolescents' sexual health behaviors. Last, communicating primarily with peers was associated with reduced likelihood of HIV testing. Having nonparental adult communication sources, including health care providers, teachers, and religious leaders, may be critical for encouraging safer sex behaviors among homeless adolescents.

Text-Messaging, Online Peer Support Group, and Coaching Strategies to Optimize the HIV Prevention Continuum for Youth: Protocol for a Randomized Controlled Trial

Background

America’s increasing HIV epidemic among youth suggests the need to identify novel strategies to leverage services and settings where youth at high risk (YAHR) for HIV can be engaged in prevention. Scalable, efficacious, and cost-effective strategies are needed, which support youth during developmental transitions when risks arise. Evidence-based behavioral interventions (EBIs) have typically relied on time-limited, scripted, and manualized protocols that were often delivered with low fidelity and lacked evidence for effectiveness.

Objective

This study aims to examine efficacy, implementation, and cost-effectiveness of easily mountable and adaptable, technology-based behavioral interventions in the context of an enhanced standard of care and study assessments that implement the guidelines of Centers for Disease Control and Prevention (CDC) for routine, repeat HIV, and sexually transmitted infection (STI) testing for high-risk youth.

Methods

Youth aged between 12 and 24 years (n=1500) are being recruited from community-based organizations and clinics serving gay, bisexual, and transgender youth, homeless youth, and postincarcerated youth, with eligibility algorithms weighting African American and Latino youth to reflect disparities in HIV incidence. At baseline and 4-month intervals over 24 months (12 months for lower-risk youth), interviewers monitor uptake of HIV prevention continuum steps (linkage to health care, use of pre- or postexposure prophylaxis, condoms, and prevention services) and secondary outcomes of substance use, mental health, and housing security. Assessments include rapid diagnostic tests for HIV, STIs, drugs, and alcohol. The study is powered to detect modest intervention effects among gay or bisexual male and transgender youth with 70% retention.

Youth are randomized to 4 conditions: (1) enhanced standard of care of automated text-messaging and monitoring (AMM) and repeat HIV/STI testing assessment procedures (n=690); (2) online group peer support via private social media plus AMM (n=270); (3) coaching that is strengths-based, youth-centered, unscripted, based on common practice elements of EBI, available over 24 months, and delivered by near-peer paraprofessionals via text, phone, and in-person, plus AMM (n=270); and (4) online group peer support plus coaching and AMM (n=270).

Results

The project was funded in September 2016 and enrollment began in May 2017. Enrollment will be completed between June and August 2019. Data analysis is currently underway, and the first results are expected to be submitted for publication in 2019.

Conclusions

This hybrid implementation-effectiveness study examines alternative models for implementing the CDC guidelines for routine HIV/STI testing for YAHR of acquiring HIV and for delivering evidence-based behavioral intervention content in modular elements instead of scripted manuals and available over 24 months of follow-up, while also monitoring implementation, costs, and effectiveness. The greatest impacts are expected for coaching, whereas online group peer support is expected to have lower impact but may be more cost-effective.

Trial Registration

ClinicalTrials.gov NCT03134833; https://clinicaltrials.gov/ct2/show/NCT03134833 (Archived by WebCite at http://www.webcitation.org/76el0Viw9)

International Registered Report Identifier (IRRID)

DERR1-10.2196/11165

Acute HIV Infection in Youth: Protocol for the Adolescent Trials Network 147 (ATN147) Comprehensive Adolescent Research and Engagement Studies (CARES) Study

Background

Early treatment studies have shown that prompt treatment of HIV with combination antiretroviral therapy (cART) can limit the size of latent viral reservoirs, thereby providing clinical and public health benefits. Studies have demonstrated that adolescents have a greater capacity for immune reconstitution than adults. Nevertheless, adolescents who acquired HIV through sexual transmission have not been included in early treatment studies because of challenges in identification and adherence to cART.

Objective

This study aimed to identify and promptly treat with cART youth aged 12 to 24 years in Los Angeles and New Orleans who have acute, recent, or established HIV infection, as determined by Fiebig stages 1 to 6 determined by viral RNA polymerase chain reaction, p24 antigen presence, and HIV-1 antigen Western blot. The protocol recommends treatment on the day of diagnosis when feasible. Surveillance and dedicated behavioral strategies are used to retain them in care and optimize adherence. Through serial follow-up, HIV biomarkers and response to antiretroviral therapy (ART) are assessed. The study aims to assess viral dynamics, decay and persistence of viral reservoirs over time, and correlate these data with the duration of viral suppression.

Methods

A total of 72 youth (36 acutely infected and 36 treatment naïve controls) are enrolled across clinical sites using a current community-based strategy and direct referrals. Youth are prescribed ART according to the standard of care HIV-1 management guidelines and followed for a period of 2 years. Assessments are conducted at specific time points throughout these 2 years of follow-up for monitoring of adherence to ART, viral load, magnitude of HIV reservoirs, and presence of coinfections.

Results

The study began enrolling youth in July 2017 across study sites in Los Angeles and New Orleans. As of September 30, 2018, a total of 37 youth were enrolled, 12 with recently acquired, 16 with established HIV infection as determined by Fiebig staging, and 9 pending determination of Fiebig status. Recruitment and enrollment are ongoing.

Conclusions

We hypothesize that the size of the HIV reservoir and immune activation markers will be different across groups treated with cART, that is, those with acute or recent HIV infection and those with established infection. Adolescents treated early who are virally suppressed will have diminished HIV reservoirs than those with established infection. These youth may be potential candidates for a possible HIV vaccine and additional HIV remission intervention trials. Our study will inform future studies of viral remission strategies.

International Registered Report Identifier (IRRID)

DERR1-10.2196/10807

But Everyone is Doing It (Sort of)! Perceived Sexual Risks in the Social Environment and the Impact on Homeless Youth Engagement in Concurrent Sexual Relationships

Although homeless youth are likely to engage in concurrent sexual relationships and doing so can accelerate HIV transmission, the issue of sexual concurrency (i.e., having sexual partnerships that overlap in time) has received scarce attention in this vulnerable population. The literature that exists tends to focus on individuals' characteristics that may be associated with concurrency and overlooks the influence of their social environment. Informed by the risk amplification and abatement model (RAAM), this study explored the association between pro-social and problematic social network connections, and sexual concurrency among homeless youth using drop-in center services (N = 841). Nearly 37% of youth engaged in concurrency. Partially consistent with the RAAM, regression analyses showed that affiliation with more problematic ties (i.e., having more network members who practice concurrency and unprotected sex) was associated with greater sexual concurrency. Programs addressing HIV risk among homeless youth in drop-in centers should consider the role youths' network composition may play in concurrency.

Health Issues Associated with Commercial Sexual Exploitation and Sex Trafficking of Children in the United States: A Systematic Review

This article reviews studies examining health issues associated with commercial sexual exploitation and sex trafficking (CSE/ST) of children in the United States. We searched five health and social sciences databases for peer-reviewed articles published in English between January 1990 and April 2017. After independent screening of the records, we identified 27 studies that met the inclusion criteria. Descriptions of the included studies and their definitions of CSE/ST are provided. Most of the studies sampled children and youth in urban, metropolitan areas and employed cross-sectional surveys or reviewed case files and medical records of convenience samples. Studies differed widely in their operationalization of CSE/ST, which limit systematic comparison across studies and the generalizability of findings. Qualitative analysis of the included studies shows that among commercially sexually exploited/trafficked children, there are elevated burdens of substance use and abuse, mental health disorders such as depression, PTSD, suicidal behaviors, and sexual and reproductive health issues including STIs, HIV, and pregnancy. This review underscores the need for more empirical studies, to guide an evidence-based understanding of and response to the range and complexity of the health issues in this population. Of particular utility are studies that address some of the methodological limitations of prior research in this field (e.g., cross-sectional, convenience samples) and those that assess overlooked health issues (e.g., malnutrition, eating disorders, post-trauma growth, and long-term health consequences).

Trauma and homelessness in youth: Psychopathology and intervention

Youth runaway behavior and homelessness (RHY) in the U.S. is increasingly common, with prevalence estimated at 1-1.7 million youth. RHY have multiple, overlapping problems often including poor physical and mental health, frequent street victimization, and histories of physical and sexual abuse. Further, current street victimization interacts with childhood abuse to produce complex, unique presentations of traumatic symptoms and related disorders in runaway and homeless youth. This review paper explores (1) the role of childhood trauma in the genesis of runaway and homeless behavior, and (2) how childhood trauma interacts with street victimization to create vulnerability to psychopathology. In response to the trauma needs of RHY, we conducted a systematic review of the state of the current literature on trauma-informed interventions for RHY. We conclude that the field currently lacks empirically validated trauma interventions in RHY. However, theoretically plausible frameworks do exist and could be the basis for future research and intervention development.

HIV prevalence in children and youth living on the street and subject to commercial sexual exploitation: a systematic review

The aim of this review was to describe HIV prevalence in children and youth living on the street and subject to commercial sexual exploitation, and the studies' characteristics in terms of place, time, population, and sample design. This was a systematic review, not a meta-analysis, based on an article search in 10 electronic databases: Science Direct, MEDLINE, OVID, LILACS, Wiley InterScience, MD Consult, Springer Link, Embase, Web of Science, and Ebsco. A complementary search was also performed in the libraries of schools of public health and webpages of U.N. agencies, besides the reference lists from the selected articles. We selected observational studies focused on children and youth living on the street and subject to commercial sexual exploitation, ranging in age from 10 to 20 years, with the results for HIV prevalence rates. A total of 9,829 references were retrieved, of which 15 met the inclusion criteria and comprise this descriptive summary. Of these 15 articles, 12 were conducted in children and youth living on the street and three in children subject to commercial sexual exploitation. All 15 were cross-sectional studies. HIV prevalence in children and youth living on the street ranged from 0% in Dallas, USA and Cochabamba, Bolivia to 37.4% in St. Petersburg, Russia. In children and youth living subject to commercial sexual exploitation, prevalence ranged from 2% in Toronto, Canada to 20% in Kolkata, India. In conclusion, HIV infection is present in children and youth living on the street and subject to commercial sexual exploitation. Measures are needed for prevention, diagnosis, and treatment as a public health priority and an ethical responsibility on the part of governments and society.

Evaluation of an HIV and STD Prevention Program for Adolescents in Juvenile Rehabilitation Centers

The aim of this study was to evaluate a sexual and STD/AIDS prevention program tailored for adolescents with social adaptation difficulties in juvenile rehabilitation facilities. The impact of the intervention on the psychosocial determinants of condom use were assessed, using a pretest post-test quasi-experimental design. A total of 296 adolescents participated in the program (experimental group) while 240 adolescents did not receive the intervention (control group). The program led to positive outcomes among participants with respect to several of the main psychosocial determinants of condom use for sexual intercourse with a new partner. The results suggest that interventions that draw upon a combination of theoretical knowledge and consideration of the specific characteristics of the milieu could be efficient in promoting safer sexual practices among adolescents in juvenile rehabilitation centers.

Short-term effects of a brief intervention to reduce alcohol use and sexual risk among homeless young adults: Results from a randomized controlled trial

BACKGROUND

Homeless young adults are more likely than their never-homeless counterparts to abuse alcohol and engage in risky sexual behaviors, yet no interventions to simultaneously reduce both these behaviors among this vulnerable population have been systematically designed and evaluated. We therefore developed a brief intervention (BI) to reduce both alcohol use and sexual risk behaviors among homeless young adults. The results of a randomized trial testing the BI against an education comparison (EC) are presented.

METHOD

Young adults (N=61; age 17-22 years) from an urban, Northeastern crisis shelter were randomly assigned to either the 2-session, individual-level BI or a time-matched, 2-session, individual-level EC. Generalized linear mixed models for repeated measures determined effects of treatment condition on outcomes.

RESULTS

The BI significantly increased participant readiness to change alcohol use. However, it did not significantly decrease primary alcohol or HIV sexual risk outcomes, independently or relative to EC (all ps>.05). Participants in the EC reduced times engaged in unprotected sex between baseline and post-intervention to a significantly greater extent (p<.01) than those in the BI condition. Participants in both conditions reported satisfaction with respective interventions.

CONCLUSIONS

Findings suggest that the BI was acceptable and successful in getting participants to consider changing their drinking. However, lack of change in alcohol and sexual behavior outcomes indicates the need for further research to determine how to translate readiness to change into actual behavioral change among homeless young adults.

Correlates of HIV risk behaviors among homeless and unstably housed young adults

OBJECTIVES

Homeless young adults are exposed to multiple risk factors for HIV infection. We identified HIV risk behaviors and their correlates among homeless young adults in Portland, Oregon.

METHODS

We conducted a community-based, cross-sectional survey of HIV risk behaviors among homeless young adults aged 18-25 years in 2010. Participants completed three study components: (1) an interviewer-administered survey of HIV risk behaviors; (2) a brief, client-centered HIV risk-based counseling session; and (3) rapid HIV testing.

RESULTS

Among 208 participants, 45.8% identified as racial/ethnic minority groups, 63.8% were male, and 35.7% self-identified as nonheterosexual. Six participants, all from sexual minority groups, had positive HIV screening results (two newly identified, four previously known) for a seropositivity rate of 2.9%. Female sex, belonging to a sexual minority group, frequent traveling between cities, depression, and alcohol use to intoxication were significantly associated with unprotected sex in univariate analysis. Female sex and high perceived risk of HIV were significantly associated with unprotected sex in multivariate analysis.

CONCLUSIONS

Our findings support the need for enhanced HIV prevention interventions for homeless young adults.

Are females who inject drugs at higher risk for HIV infection than males who inject drugs: an international systematic review of high seroprevalence areas

OBJECTIVE

There are multiple reasons why females who inject drugs may be more likely to become infected with HIV than males who inject drugs. Where this is the case, special HIV prevention programs for females would be needed.

DESIGN

International systematic review and meta-analysis of studies across 14 countries.

METHODS

Countries with high seroprevalence (>20%) HIV epidemics among persons who inject drugs (PWID) were identified from the Reference Group to the UN on HIV and Injecting Drug Use. Systematic literature reviews collected data on HIV prevalence by gender for these countries. Non-parametric and parametric tests along with meta-analytic techniques examined heterogeneity and differences in odds ratios (OR) across studies.

RESULTS

Data were abstracted from 117 studies in 14 countries; total sample size N = 128,745. The mean weighted OR for HIV prevalence among females to males was 1.18 [95% CI 1.10-1.26], with high heterogeneity among studies (I(2)= 70.7%). There was a Gaussian distribution of the log ORs across studies in the sample.

CONCLUSION

There was a significantly higher HIV prevalence among females compared to males who inject drugs in high seroprevalence settings, but the effect size is extremely modest. The high level of heterogeneity and the Gaussian distribution suggest multiple causes of differences in HIV prevalence between females and males, with a specific difference determined by local factors. Greater understanding of factors that may protect females from HIV infection may provide insights into more effective HIV prevention for both females and males who inject drugs.

A family intervention to reduce sexual risk behavior, substance use, and delinquency among newly homeless youth

PURPOSE

We evaluate the efficacy of a short family intervention in reducing sexual risk behavior, drug use, and delinquent behaviors among homeless youth.

METHODS

A randomized controlled trial of 151 families with a homeless adolescent aged 12 to 17 years. Between March 2006 and June 2009, adolescents were recruited from diverse sites in Southern California and were assessed at recruitment (baseline), and at 3, 6, and 12 months later. Families were randomly assigned to an intervention condition with five weekly home-based intervention sessions or a control condition (standard care). Main outcome measures reflect self-reported sexual risk behavior, substance use, and delinquent behaviors over the past 90 days.

RESULTS

Sexual risk behavior (e.g., mean number of partners; p < .001), alcohol use (p = .003), hard drug use (p < .001), and delinquent behaviors (p = .001) decreased significantly more during 12 months in the intervention condition compared with the control condition. Marijuana use, however, significantly increased in the intervention condition compared with the control condition (p < .001).

CONCLUSIONS

An intervention to reengage families of homeless youth has significant benefits in reducing risk over 12 months.

Mobilizing homeless youth for HIV prevention: a social network analysis of the acceptability of a face-to-face and online social networking intervention

The objective of the study is to use social network analysis to examine the acceptability of a youth-led, hybrid face-to-face and online social networking HIV prevention program for homeless youth.Seven peer leaders (PLs) engaged face-to-face homeless youth (F2F) in the creation of digital media projects (e.g. You Tube videos). PL and F2F recruited online youth (OY) to participate in MySpace and Facebook communities where digital media was disseminated and discussed. The resulting social networks were assessed with respect to size, growth, density, relative centrality of positions and homophily of ties. Seven PL, 53 F2F and 103 OY created two large networks. After the first 50 F2F youth participated, online networks entered a rapid growth phase. OY were among the most central youth in these networks. Younger aged persons and females were disproportionately connected to like youth. The program appears highly acceptable to homeless youth. Social network analysis revealed which PL were the most critical to the program and which types of participants (younger youth and females) may require additional outreach efforts in the future.

Position-specific HIV risk in a large network of homeless youths

OBJECTIVES

We examined interconnections among runaway and homeless youths (RHYs) and how aggregated network structure position was associated with HIV risk in this population.

METHODS

We collected individual and social network data from 136 RHYs. On the basis of these data, we generated a sociomatrix, accomplished network visualization with a "spring embedder," and examined k-cores. We used multivariate logistic regression models to assess associations between peripheral and nonperipheral network position and recent unprotected sexual intercourse.

RESULTS

Small numbers of nominations at the individual level aggregated into a large social network with a visible core, periphery, and small clusters. Female youths were more likely to be in the core, as were youths who had been homeless for 2 years or more. Youths at the periphery were less likely to report unprotected intercourse and had been homeless for a shorter duration.

CONCLUSIONS

HIV risk was a function of risk-taking youths' connections with one another and was associated with position in the overall network structure. Social network-based prevention programs, young women's housing and health programs, and housing-first programs for peripheral youths could be effective strategies for preventing HIV among this population.

Correlates of engaging in survival sex among homeless youth and young adults

Using a sample of 1,625 homeless youth and young adults aged 10 to 25 from 28 different states in the United States, this study examines the correlates of having engaged in survival sex. Findings suggest that differences exist based on demographic variables (gender, age, race, and sexual orientation), lifetime drug use (inhalants, Valium™, crack cocaine, alcohol, Coricidin™, and morphine), recent drug use (alcohol, ecstasy, heroin, and methamphetamine), mental health variables (suicide attempts, familial history of substance use, and having been in substance abuse treatment), and health variables (sharing needles and having been tested for HIV). In addition to replicating previous findings, this study's findings suggest that African American youth; gay, lesbian, or bisexual youth; and youth who had been tested for HIV were significantly more likely to have engaged in survival sex than White, heterosexual youth, and youth who had not been tested for HIV, respectively. Implications for interventions with youth and suggestions for future research are discussed.

Online social networking technologies, HIV knowledge, and sexual risk and testing behaviors among homeless youth

This study evaluates associations between online social networking and sexual health behaviors among homeless youth in Los Angeles. We analyzed survey data from 201 homeless youth accessing services at a Los Angeles agency. Multivariate (regression and logistic) models assessed whether use of (and topics discussed on) online social networking technologies affect HIV knowledge, sexual risk behaviors, and testing for sexually transmitted infections (STIs). One set of results suggests that using online social networks for partner seeking (compared to not using the networks for seeking partners) is associated with increased sexual risk behaviors. Supporting data suggest that (1) using online social networks to talk about safe sex is associated with an increased likelihood of having met a recent sex partner online, and (2) having online sex partners and talking to friends on online social networks about drugs and partying is associated with increased exchange sex. However, results also suggest that online social network usage is associated with increased knowledge and HIV/STI prevention among homeless youth: (1) using online social networks to talk about love and safe sex is associated with increased knowledge about HIV, (2) using the networks to talk about love is associated with decreased exchange sex, and (3) merely being a member of an online social network is associated with increased likelihood of having previously tested for STIs. Taken together, this study suggests that online social networking and the topics discussed on these networks can potentially increase and decrease sexual risk behaviors depending on how the networks are used. Developing sexual health services and interventions on online social networks could reduce sexual risk behaviors.

Multicity HIV seroprevalence in street youth, Ukraine

We conducted the first systematic, community-based, multicity assessment outside the USA of HIV seroprevalence, risk factors and linkage into clinical services among 929 street youth. After city-wide mapping, we used time-location sampling and randomly selected 74 venues in Odesa, Kyiv and Donetsk, Ukraine. Rapid HIV testing with post-test counselling was offered to all eligible youths aged 15-24 years. Overall, 18.4% (95% confidence interval 16.2-20.2) were HIV positive and 85% had previously unknown status. Rates were identical by sex. Subgroups with highest rates included orphans (26%), youths with histories of exchanging sex (35%), sexually transmitted infections (STIs) (37%), injection drug use (IDU) (42%) and needle sharing (49%). Independent predictors, similar across age groups and city, included being orphaned, time on the street, history of anal sex, STIs, exchanging sex, any drug use, IDU and needle sharing. Two-thirds (68%) of HIV-positive youths were linked to services. This high-risk population has many immediate needs.

Internet use, social networking, and HIV/AIDS risk for homeless adolescents

OBJECTIVE

To examine the association between sexual health and internet use, including social networking websites such as MySpace and Facebook, among a sample of homeless adolescents at high risk of contracting HIV/AIDS.

METHODS

In 2009, a survey of internet use among 201 homeless adolescents was carried out. Multivariate logistic regression models assessed how patterns of use were associated with engaging in exchange sex (sex for money, drugs, or housing), recent HIV testing, and online partner-seeking behaviors.

RESULTS

Among the surveyed adolescents, 96.5% reported internet use. Most youth accessed the internet at public libraries or youth service agencies. Increased time online and recent engagement in exchange sex were both positively associated with online partner-seeking. Youth connected to family members online were less likely to practice exchange sex and more likely to report a recent HIV test. Youth connected to street-based peers online were more likely to practice exchange sex, whereas youth connected to home-based peers online were more likely to report a recent HIV test.

CONCLUSIONS

Although these data are preliminary, homeless youth need more access to the internet, as access facilitates connecting with family and home-based peers whose presence may reduce sexual risk-taking. Access, however, must be carefully monitored to prevent youth soliciting sex online.

The positive role of social networks and social networking technology in the condom-using behaviors of homeless young people

OBJECTIVE

To examine the impact of condom-using peers in the social networks of homeless young people, differences in behaviors were assessed based on the social location of ties (home-based vs. street-based) and how those ties are maintained (face-to-face vs. via social networking technology).

METHODS

"Ego-centric" social network data were collected from 103 currently sexually active homeless young people aged 16-26 years in Los Angeles, California. Associations between condom use and the condom-using behaviors of social network influences were assessed using standard logistic regression.

RESULTS

About 52% of respondents had a street-based peer who was a condom user. Having such a peer was associated with a 70% reduction in the odds of having unprotected sex at last intercourse. About 22% of respondents had a condom-using, home-based peer with whom they communicated only via social networking technology. Having such a peer was associated with a 90% reduction in risky sexual behavior and a 3.5 times increase in safer sex behavior.

CONCLUSION

The study revealed several implications for new human immunodeficiency virus-prevention interventions that mobilize these networks and social networking technologies.

Individual and environmental protective factors for risky sexual behavior among homeless youth: an exploration of gender differences

The goal of the current study was to identify potential individual and environmental protective factors for sex risk behavior among homeless youth. We explored gender differences in the prediction of unprotected sex and number of sex partners. Data were collected from 192 sexually active, homeless youth who were 14-21 years old. High rates of sex risk behavior were reported. Significant gender differences were found in STD rates with 19% of females and 2% of males reporting an STD diagnosis during the previous three months. Findings indicated that positive expectations for the future were associated with fewer sex partners for both genders, whereas decision making skills predicted a lower percentage of unprotected sex for males and fewer sex partners for females. For females, univariate analyses indicated that self-esteem and having a natural mentor may reduce the likelihood of unprotected sex, whereas multivariate analysis indicated that being employed or in school may play a protective role with respect to number of sex partners.

HIV seroprevalence in street youth, St. Petersburg, Russia

BACKGROUND

Reliable data on HIV infection among Russian street youth are unavailable. The purpose of this study was to assess HIV seroprevalence among street youth in St Petersburg and to describe social, sexual, and behavioral characteristics associated with HIV infection.

METHODS

A cross-sectional assessment conducted during January-May 2006 included city-wide mapping of 41 street youth locations, random selection of 22 sites, rapid HIV testing for all consenting 15-19-year-old male and female street youth at these sites, and an interviewer-administered survey. Adjusted odds ratios (AOR) were calculated using logistic regression, accounting for intracluster homogeneity.

RESULTS

Of 313 participants, 117 (37.4%, 95% confidence interval 26.1-50.2%) were HIV infected. Subgroups with the highest seroprevalences included double orphans (64.3%), those with no place to live (68.1%), those previously diagnosed with a sexually transmitted infection (STI; 70.5%), those currently sharing needles (86.4%), and those currently using inhalants (60.5%) or injection drugs (78.6%), including Stadol (82.3%) or heroin (78.1%). Characteristics independently associated with HIV infection included injecting drugs (AOR 23.0), sharing needles (AOR 13.3), being a double or single orphan (AOR 3.3 and 1.8), having no place to live (AOR 2.4), and being diagnosed with a STI (AOR 2.1). Most HIV-infected street youth were sexually active (96.6%), had multiple partners (65.0%), and used condoms inconsistently (80.3%).

DISCUSSION

Street youth aged 15-19 years in St Petersburg, Russia, have an extraordinarily high HIV seroprevalence. In street youth who are injection drug users, HIV seroprevalence is the highest ever reported for eastern Europe and is among the highest in the world.

Housing stability over two years and HIV risk among newly homeless youth

The stability of living situation was examined as a predictor of young people's HIV-related sexual and drug use acts two years after leaving home for the first time. Newly homeless youth aged 12-20 years were recruited in Los Angeles County, California, U.S.A. (n = 261) and Melbourne, Australia (n = 165) and followed longitudinally at 3, 6, 12, 18, and 24 months. Their family history of moves and the type and frequency of moves over the two years following becoming newly homeless were examined. Regression analyses indicated that recent sexual risk two years after becoming newly homeless was not related to the instability of youths' living situations; condom use was higher among youth with more placements in institutional settings and among males. Drug use was significantly related to having moved more often over two years and Melbourne youth used drugs significantly more than youth in Los Angeles.

Pro-social and problematic social network influences on HIV/AIDS risk behaviours among newly homeless youth in Los Angeles

We examined the social network composition among newly homeless youth over time and assessed how pro-social and problematic peers affected sexual and drug-using HIV/AIDS risk-behaviours among 183 youth in Los Angeles County, California. The percentage of newly homeless youth who reported that 'most' or 'all' of their friends were attending school, had jobs, and got along with their families was 73%, 24%, and 50% respectively. Logistic regression models indicated that presence of these pro-social peers reduced HIV risk behaviours at two years; odds of HIV-risk were lower with a greater number of peers who attend school, have a job, or have positive family relationships or if networks change over time to include more of these peers. Presence of problematic peers increased the likelihood of HIV risk-taking; odds of HIV risk behaviours increased with a greater number of peers at baseline who steal, have overdosed, have been arrested, or are in a gang, or if networks change to include more of these peers. Interventions should target newly homeless youth in networks that contain problematic peers, but should strive to harness the naturally occurring pro-social peer influences present in these networks.

Gender-specific correlates of sex trade among homeless and marginally housed individuals in San Francisco

Sex exchange is a well-established risk factor for HIV infection. Little is known about how correlates of sex trade differ by biologic sex and whether length of homelessness is associated with sex trade. We conducted a cross-sectional study among a sample of 1,148 homeless and marginally housed individuals in San Francisco to assess correlates of exchanging sex for money or drugs. Key independent variables included length of homelessness; use of crack, heroin or methamphetamine; HIV status; and sexual orientation. Analyses were restricted by biologic sex. In total, 39% of women and 30% of men reported a lifetime history of sex exchange. Methamphetamine use and greater length of homelessness were positively associated with a history of sex trade among women, while heroin use, recent mental health treatment, and homosexual or bisexual orientation were significantly associated with sex trade for men. Crack use was correlated with sex trade for both genders. Correlates of sex trade differ significantly according to biologic sex, and these differences should be considered in the design of effective HIV prevention programs. Our findings highlight the critical need to develop long-term services to improve housing status for homeless women, mental health services for homeless men, and drug treatment services for homeless adults involved in sex work.

The health of street youth: a Canadian perspective

OBJECTIVE

To review epidemiologic studies of the health of street youth in industrialized countries, with a special focus on Canadian youth.

METHODS

We identified 52 peer-reviewed studies from searches of the MEDLINE database and bibliographies of published papers, for data on blood-borne and sexually transmitted infections, mental health problems, pregnancy, violence and mortality.

RESULTS

Rates of hepatitis B, hepatitis C, and HIV infection are much higher among street youth than among their non-street peers. Likewise, the prevalence of all mental health problems assessed in street youth is greater than that in non-street youth. Pregnancy is more frequent among street than household youth. Street youth also experience high levels of violence: a large proportion report physical abuse or assault. Finally, mortality is about 11 times the expected rate based on age and sex and is mainly caused by suicide and drug overdose.

CONCLUSION

Current research results are useful to orient public health interventions for street youth, but further epidemiologic research is needed. The need for Canadian data is particularly acute in specific areas including mental health, violence, pregnancy, and sexually transmitted infections such as, for example, herpes infection and syphilis.

Do street youths' perceptions of their caregivers predict HIV-risk behavior?

This study examined street youths' perceptions of their caregivers and the association between these perceptions and HIV-risk behavior in a random probability sample of 715 12- to 23-year-old street youths from Los Angeles and San Diego, CA (mean age, 18.7 years). All participants had been homeless at some point during the past 12 months, with 70% recruited from nonshelter sites. Although youths reported high rates of hostility, unavailability, substance use, and legal problems among their caregivers, 86% reported that their caregivers had at least one attribute associated with support. Caregiver problems were associated with youth having had more sexual partners in the past 30 days and having higher risk drug use. High caregiver support was associated with more sexual partners and lower use of condoms with steady partners. Caregiver attributes did not predict condom use with transient partners.

Prevention for HIV-seropositive persons: successive approximation toward a new identity

This article presents a three-module intervention based on social action theory that focuses on health promotion and social identity formation for seropositive youth. The modules are designed to reduce transmission of HIV by reducing sexual and substance abuse acts, increasing healthy acts and adherence to care, and maintaining positive behavioral routines. Components of the modules are described, including examples of how these components are implemented in the actual intervention sessions. The importance of using successive approximation to consolidate changes in behavior by defining social roles and personal identities that are consistent with positive behavioral routines is demonstrated. Outcomes of the intervention are presented as well as issues of cost-effectiveness, feasibility, and alternative implementation strategies.

HIV risk profile of male street youth involved in survival sex

OBJECTIVES

To compare HIV risk factors of male street youth involved in survival sex with those of their never involved peers and to describe the sexual activities of the involved youths.

METHODS

From 2001 to 2003, street youth aged 14-23 years were recruited from street youth agencies in Montreal, Canada. Information was collected on sociodemographic characteristics, substance use, and sexual behaviours. Involvement in survival sex was defined as having ever exchanged sex for money, gifts, drugs, shelter, or other needs. Logistic regression was used to identify HIV risk factors associated with involvement in survival sex.

RESULTS

Among the 542 male participants recruited, 27.7% reported involvement in survival sex. HIV risk factors independently associated with such involvement were injection drug using partners (modulated by length of homelessness), unprotected oral sex with male partners, steroid injection, history of sexual abuse, and drug injection. Among involved youths, 32.0% had only female clients, 41.3% only male clients, and 26.7% had clients of both sexes. Unprotected sexual activities were common with clients. However, even more risks were taken with non-commercial sexual partners.

CONCLUSIONS

Male street youth involved in survival sex are at higher risk for HIV than their non-involved peers not only because of their unprotected commercial sexual activities. They have multiple other HIV risks related to non-commercial sexual activities, drug injection, and sexual abuse. All these risks need to be addressed when providing sexual health interventions for this population.

Predictors of initiation into prostitution among female street youths

Prostitution among female street youths represents an important risk factor for several health problems. Little is known about the incidence and determinants of prostitution in this vulnerable population, and no data have been previously reported based on a longitudinal follow-up study. The objective of this study was to determine predictors of initiation into prostitution among female street youths. Female youths aged 14 to 25 years were enrolled in the Montreal Street Youth Cohort. They completed a baseline and at least one follow-up questionnaire between January 1995 and March 2000. Girls who reported never having engaged in prostitution at baseline were followed prospectively to estimate the incidence and predictors of prostitution. Of the 330 female street youths enrolled as of September 2000 in the cohort, 148 reported no history of involvement in prostitution at baseline and completed at least one follow-up questionnaire. Of these 148 girls, 33 became involved in prostitution over the course of the study (mean follow-up 2.4 years), resulting in an incidence rate of 11.1/100 person-years. Multivariate Cox regression analysis revealed having a female sex partner (adjusted hazard ratio [AHR] 3.8; 95% confidence interval [CI] 1.6-9.1) was an independent predictor of initiation into prostitution after controlling for having been on the street at age 15 years or younger (AHR 1.8, 95% CI 0.9-3.8), using acid or phencyclidine (PCP; AHR 2.0, 95% CI 0.9-4.6), using heroin (AHR 1.9, 95% CI 0.7-5.5), the use of drugs greater than twice per week (AHR 1.9, 95% CI 0.9-4.2), and injection drug use (AHR 0.8, 95% CI 0.3-2.4). The incidence of prostitution in female street youths was elevated. Having a female sex partner was a strong predictor of initiating involvement in prostitution.

Mental disorder, subsistence strategies, and victimization among gay, lesbian, and bisexual homeless and runaway adolescents

This study compares participation in deviant subsistence strategies, street victimization, and lifetime prevalence of five mental disorders (conduct disorder, major depressive disorder, post-traumatic stress disorder, alcohol abuse, and drug abuse) among heterosexual males and females (n = 366) and gay, lesbian, and bisexual (n = 63) homeless and runaway adolescents from the first wave of a longitudinal study of homeless youth in four Midwestern states. The results indicate that gay, lesbian, and bisexual adolescents were more likely to have been physically and sexually abused by caretakers, we more likely to engage in risky survival strategies when on their own (including survival sex), were more likely to be physically and sexually victimized when on the streets, and were more likely to meet criteria for mental disorder than were their heterosexual counterparts.

Reductions in HIV risk among runaway youth

Runaway youth are 6-12 times more likely to become infected with HIV than other youth. Using a quasi-experimental design, the efficacy of an HIV prevention program was evaluated over 2 years among 2 groups of runaways: (1) those at 2 shelters who received Street Smart, an intensive HIV intervention program, and (2) youth at 2 control shelters. Street Smart provided youth with access to health care and condoms and delivered a 10-session skill-focused prevention program based on social learning theory to youth. Prior to analysis of the intervention's outcomes, propensity scores were used to identify comparable subgroups of youth in the intervention (n = 101) and control conditions (n = 86). Compared to females in the control condition, females in the intervention condition significantly reduced their unprotected sexual acts at 2 years and alcohol use, marijuana use, and the number of drugs used over 12 months. Male adolescents in the intervention condition showed significant reductions in marijuana use over 6 months compared to control youth. Adolescent HIV prevention programs must proactively identify mechanisms for maintaining behavior change over the long-term, and innovative research designs are needed to allow examination of agency-level interventions.

HIV incidence among street youth in Montreal, Canada

OBJECTIVES

To estimate HIV incidence and identify predictors of seroconversion among Montreal street youth.

METHODS

From 1995 to 2000, street youth aged 14-25 years were recruited in a prospective cohort study. Interviews were conducted semiannually and included anti-HIV antibody testing. Among subjects who tested HIV negative at study entry and were interviewed at least twice, predictors of HIV seroconversion were identified using Cox regression. Variables considered as potential predictors were age, sex, injection drug use, being a male reporting male sexual partners, and survival sex.

RESULTS

Overall, 1013 youth were recruited in the study. HIV prevalence at study entry was 1.4% [95% confidence interval (CI) 0.8-2.4] and was stable over the 6 recruitment years. Among the 863 subjects selected for the incidence analysis, 66.7% were boys, 47.2% had ever injected drugs at study entry, and 25.7% had ever engaged in survival sex. The selected participants cumulated 2327 person-years of follow-up and 16 HIV seroconversions were observed, for an incidence rate of 0.69 per 100 person-years (95% CI 0.39-1.11). In univariate analysis, injection drug use [hazard ratio (HR), 7.0] and involvement in survival sex (HR, 4.0) were associated with HIV incidence. In the multivariate analysis, only injection drug use was retained.

CONCLUSIONS

Among Montreal street youth, injection drug use was the strongest predictor of HIV seroconversion. Prevention of initiation into injection drug use must become a public health priority.

Human immunodeficiency syndrome and hepatitis B and C infections among homeless adolescents

The lifestyle of homeless adolescents places them at high risk for contracting a variety of serious illnesses. The purpose of this cross-sectional study was to determine the predictors of human immunodeficiency virus (HIV) and hepatitis infections among homeless youth. Anonymous and confidential interviewer-administered psychosocial surveys were conducted with 150 homeless youth (ages 14 to 23 years; 70% male). Venous blood samples were collected as well. Most respondents (95%) had engaged in sexual intercourse, with 13 years as the median age at first coitus. Approximately 36 percent indicated they had exchanged sex for food, shelter, or drugs. Although youth reported a high rate of consistent condom use, 16 percent of the sample tested positive for HIV, 17 percent tested positive for hepatitis B (HBV), and 12 percent tested positive for hepatitis C (HCV). Homeless youth should be considered a high-risk group for contracting HIV, HBV, and HCV infections. The positive rates for HIV, HBV, and HCV observed in this study are higher than those of many previous reports among street youth. Because HIV prevention and hepatitis B vaccination programs have been targeted at school-based youth, most homeless youth are missed by these efforts. Targeted programs are needed to reach this high-risk group. Suggested guidelines for clinicians involved in the provision of medical care to homeless children and adolescents are provided.

HIV risk profile and prostitution among female street youths

The objective of this study was to compare human immunodeficiency virus (HIV) risk factors among female street youths involved in prostitution and those with no history of prostitution. Youths aged 14 to 25 years were recruited into the Montreal Street Youth Cohort. Semiannually, youths completed an interviewer-administered questionnaire. Statistical analyses comparing characteristics and HIV risk factors for girls involved in prostitution and those never involved were carried out using parametric and nonparametric methods. Of the girls, 88 (27%) reported involvement in prostitution, and 177 girls reported no history of prostitution at the baseline interview. Girls involved in prostitution were two times and five times more likely to have reported bingeing on alcohol and on drugs, respectively. A history of injection drug use was four times more likely to have been reported by girls involved in prostitution. Further, these girls were 2.5 times more likely to have reported injected cocaine as their drug of choice. Girls involved in prostitution were younger the first time they had consensual sex and were twice as likely to have reported anal sex. Consistent condom use for anal, vaginal, and oral sex was low for all girls. Girls involved in prostitution reported more risky sexual partners. In conclusion, girls involved in prostitution may be at increased risk of HIV infection due to their injection drug use and risky sexual behaviors. Unique intervention strategies are necessary for reducing HIV infection among female street youths involved in prostitution.

Youth homelessness in San Francisco: a life cycle approach

HIV risk behaviors and seroprevalence are particularly high among street youth. Though many programs have been designed to serve them, street youth have low rates of service utilization. The aim of this street-based, ethnographic project was to study the social and cultural context of street life in this population. Data were collected by participant observation, exploratory interviews and semi-structured interviews. Twenty street youth (15-23 years old; six female), recruited from street sites in San Francisco, participated in the interviews. Field notes and transcriptions were analyzed using an inductive technique for model building. This analysis yielded a proposed model of the life cycle of youth homelessness. In the first on the street stage, youth face an intense psychological feeling of outsiderness, and an urgency to meet basic needs. These stresses either lead to an escape from street life or to a process of acculturation to the street. Initiation to the street is facilitated by street mentors, who provide youth with survival skills. In the stasis stage, youth reach a tenuous equilibrium in which they can meet their basic needs. A strong street ethic allows youth to rationalize significant conflicts and frequent physical suffering. Youth in stasis are repeatedly thrown into disequilibrium, crises that frequently cause them to come into greater contact with mainstream society. After repeated episodes of disequilibrium, some youth extricate themselves from street life, finding a new identity in mainstream society. Otherwise, youth return to the street, in an episode of recidivism. The life cycle model suggests that street youth who are most open to intervention are those who are in transitional states, i.e., those who have just arrived on the street or those who are in crisis (disequilibrium). If this model is validated in a larger population of youth, programs that are aimed at these two stages in the life cycle could potentially effectively complement existing programs, which are usually focused on youth in stasis.

Knowledge, attitudes, and behavior of homeless African-American adolescents: implications for HIV/AIDS prevention

The purpose of this pilot study was to describe the knowledge of HIV/AIDS, attitudes about condom use, and the sexual behavior of African-American adolescents who reside in a children's emergency homeless shelter. The Attitudes Toward Condom Usage Questionnaire, the AIDS Knowledge and Attitude Survey, and a Perceived Risk of HIV/AIDS Scale were modified and administered to 37 African-American male and female adolescents who reside in an emergency shelter. HIV/AIDS knowledge and attitudes about condoms among these respondents were comparable to those of other adolescents described in the literature in that there was a strong knowledge of HIV/AIDS, although sexual behavior and attitudes toward condoms were not consistent with this knowledge. Significant differences between male and female respondents were only found on three items of the Attitudes Toward Condom Usage Questionnaire and on the Perceived Risk of HIV/AIDS Scale at the 0.05 level. The knowledge, attitudes, and sexual behavior of homeless, African-American adolescents should be examined to develop and implement appropriate programs to address the specific needs of this population. Further research should focus on this population and expand on this preliminary data.

Infections in the homeless

Homeless people in developed countries have specific problems predisposing them to infectious diseases. Respiratory infections and outbreaks of tuberculosis and other aerosol transmitted infections have been reported. Homeless intravenous drug users are at an increased risk of contracting HIV, and hepatitis B and C infections. Skin problems are the main reason the homeless seek medical attention, and these commonly include scabies, pediculosis, tinea infections, and impetigo. Many foot disorders are more prevalent in the homeless including ulcers, cellulitis, erysipelas, and gas gangrene. The louse transmitted bacteria Bartonella quintana has recently been found to cause clinical conditions in the homeless such as urban trench fever, bacillary angiomatosis, endocarditis, and chronic afebrile bacteraemia. Treatment of homeless people is complicated by financial constraints, self-neglect, and lack of adherence. Patients with serious and contagious illnesses should be hospitalised. Physicians should be aware of these specific issues to enhance care.

Economic evaluation of HIV risk reduction intervention in African-American male adolescents

PURPOSE

To evaluate the cost-effectiveness of a cognitive-behavioral HIV risk reduction intervention for African-American male adolescents that has previously been shown to be effective at reducing sexual risk taking.

METHODS

Standard techniques of cost-utility analysis were employed. A societal perspective and a 3% discount rate were used in the main analysis. Program costs were ascertained retrospectively. A mathematical model of HIV transmission was used to translate observed changes in sexual behavior into an estimate of the number of HIV infections the intervention averted. Intervention effects were assumed to last for 1 year. For each infection averted, the corresponding savings in future HIV-related medical care costs and quality-adjusted life years (QALYs) were estimated. The overall net cost per QALY saved (cost-utility ratio) was then calculated. Sensitivity analyses were performed to assess the robustness of the main results.

RESULTS

The cost-utility ratio was approximately $57,000 U.S. per QALY saved when training costs were included, and $41,000 U.S. per QALY saved when they were excluded. The intervention appeared substantially more cost-effective when the analysis was restricted to the subgroup of participants who reported being sexually active at baseline. Assumptions about the prevalence of HIV infection and the duration of intervention effectiveness also greatly affected the cost-utility ratio.

CONCLUSIONS

The HIV prevention intervention was moderately cost-effective in comparison with other health care programs. Selectively implementing the intervention in high-HIV prevalence communities and with sexually active youth can enhance cost-effectiveness.