Combination HIV prevention interventions: the potential of integrated behavioral and biomedical approaches

Interventions, Barriers, and Facilitators to Address the Sexual Problems of Gay, Bisexual and Other Men Who Have Sex with Men Living with HIV: A Rapid Scoping Review

Sexual problems are common among gay, bisexual, and other men who have sex with men (GBM) after diagnosis with HIV. However, these are often overlooked in care and research, where sexual risk reduction and biomedical aspects of sexual health tend to dominate. We conducted a rapid scoping review to investigate which sexual problems of GBM living with HIV are addressed by interventions, and the barriers and facilitators to their implementation. Literature from high-income countries published in English since 2010 was reviewed. Medline, Embase, PsycInfo, and Scopus databases were searched on July 4, 2022. Targeted sexual problems were categorized according to the ten dimensions of Robinson's Sexual Health Model, and barriers and facilitators, according to the five domains of the Consolidated Framework for Implementation Research (CFIR). Interventions focused solely on the dimension of Sexual Health Care/Safer Sex were excluded. Relevant information was extracted from the qualifying documents with NVivo 12 software for content analysis. Fifty-two documents were included, referring to 37 interventions which mainly took place in the United States (n = 29/37; 78%), were group-based (n = 16; 41%), and used counselling techniques (n = 23; 62%; e.g., motivational interviewing, cognitive-behavioral therapy). Their settings were mostly primary care (n = 15; 40%) or community-based (n = 16; 43%). On average, interventions addressed three sexual health dimensions (SD = 2; range: 1-10). The most targeted dimension was Sexual Health Care/Safer Sex (n = 26; 70%), which concerned sexual risk reduction. Next, Challenges (n = 23; 62%), included substance use (n = 7; 19%), sexual compulsivity (n = 6; 16%), sexual abuse (n = 6; 16%), and intimate partner violence (n = 4; 11%). Third was Talking About Sex (n = 22; 59%) which mostly concerned HIV disclosure. About a third of interventions addressed Culture/Sexual identity (n = 14; 38%), Intimacy/Relationships (n = 12; 33%), and Positive sexuality (n = 11; 30%). Finally, few targeted Body Image (n = 4; 11%), Spirituality (n = 3; 8%), Sexual Anatomy Functioning (n = 2; 5%) or Masturbation/Fantasy (n = 1; 3%). Forty-one documents (79%) mentioned implementation barriers or facilitators, particularly about the characteristics of the interventions (41% and 78%, respectively; e.g., cost, excessive duration, acceptability, feasibility) and of the individuals involved (37% and 46%; e.g., perceived stigmatization, provider expertise). The other three CFIR dimensions were less common (5%-17%). The search strategy of this review may not have captured all eligible documents, due to its limit to English-language publications. Overall, most interventions incorporated a focus on Sexual Health Care/Safer Sex, at the expenses of other prevalent sexual problems among GBM living with HIV, such as intimate partner violence (Challenges), erectile dysfunction (Sexual Anatomy Functioning), and Body Image dissatisfaction. These findings suggest they could receive more attention within clinical care and at the community level. They also highlight the importance of cost-effective and acceptable interventions conducted in non-stigmatizing environments, where patients' needs can be met by providers who are adequately trained on sexuality-related topics.

Infectious Disease Modelling of HIV Prevention Interventions: A Systematic Review and Narrative Synthesis of Compartmental Models

BACKGROUND

The HIV epidemic remains a major public health problem. Critical to transmission control are HIV prevention strategies with new interventions continuing to be developed. Mathematical models are important for understanding the potential impact of these interventions and supporting policy decisions. This systematic review aims to answer the following question: when a new HIV prevention intervention is being considered or designed, what information regarding it is necessary to include in a compartmental model to provide useful insights to policy makers? The primary objective of this review is therefore to assess suitability of current compartmental HIV prevention models for informing policy development.

METHODS

Articles published in EMBASE, Medline, Econlit, and Global Health were screened. Included studies were identified using permutations of (i) HIV, (ii) pre-exposure prophylaxis (PrEP), circumcision (both voluntary male circumcision [VMMC] and early-infant male circumcision [EIMC]), and vaccination, and (iii) modelling. Data extraction focused on study design, model structure, and intervention incorporation into models. Article quality was assessed using the TRACE (TRAnsparent and Comprehensive Ecological modelling documentation) criteria for mathematical models.

RESULTS

Of 837 articles screened, 48 articles were included in the review, with 32 unique mathematical models identified. The substantial majority of studies included PrEP (83%), whilst fewer modelled circumcision (54%), and only a few focussed on vaccination (10%). Data evaluation, implementation verification, and model output corroboration were identified as areas of poorer model quality. Parameters commonly included in the mathematical models were intervention uptake and effectiveness, with additional intervention-specific common parameters identified. We identified key modelling gaps; critically, models insufficiently incorporate multiple interventions acting simultaneously. Additionally, population subgroups were generally poorly represented-with future models requiring improved incorporation of ethnicity and sexual risk group stratification-and many models contained inappropriate data in parameterisation which will affect output accuracy.

CONCLUSIONS

This review identified gaps in compartmental models to date and suggests areas of improvement for models focusing on new prevention interventions. Resolution of such gaps within future models will ensure greater robustness and transparency, and enable more accurate assessment of the impact that new interventions may have, thereby providing more meaningful guidance to policy makers.

Integration of HIV Prevention With Sexual and Reproductive Health Services: Evidence for Contraceptive Options and HIV Outcomes Study Experience of Integrating Oral Pre-exposure HIV Prophylaxis in Family Planning Services in Lusaka, Zambia

The WHO guideline on the integration of family planning (FP) and pre-exposure HIV prophylaxis (PrEP) to enhance the health of women and adolescent girls is reflected in the Zambia Consolidated Guidelines for Treatment and Prevention of HIV Infection, 2020. There is however a dearth of data on the integration of PrEP and FP in Zambia. We describe the integration of oral PrEP in FP services using the Evidence for Contraceptive Options and HIV Outcomes (ECHO) study experience at Kamwala District Health Center in Lusaka, Zambia. The provision of oral PrEP at Kamwala started in October 2017, lasting for ~11 months, and utilized the model where initial processes to offer PrEP were on-site followed by off-site referral to laboratory and PrEP provider services. The characteristics of 658 women who enrolled in ECHO at Kamwala are representative of women accessing FP services in Lusaka. About 644 of the enrollees were offered oral PrEP. The proportion of women accepting PrEP was low at 1.08% and the proportion of study visits at which PrEP was requested was also low at 0.57%. Those who accepted PrEP were above 20 years old, married, with at least primary education, sexual behavior, and risk comparable to decliners. The ECHO study experience indicates that the setup and integration of oral PrEP and FP services are feasible in the setting. However, uptake of PrEP was very low. Possible contributory factors were as follows: (1) timing of introduction of PrEP midway in the study, (2) PrEP being a new intervention, (3) challenges of autonomy of young women to include a daily pill into their lives and anticipated challenges to adherence because of fear of adverse events, (4) possible underdetermined risk due to use of an unvalidated risk assessment tool and assessment by health care provider vs. self-assessment, and (5) extra layer of challenges to negotiate due to needing for off-site referrals. Following these findings, we conclude that further research through demonstration projects of integration of oral PrEP and FP may provide solutions to low uptake. This information is critical for scaling up of integration HIV prevention services and sexual and reproductive health (SRH) services.

Brief Report: Using Behavioral Economics to Increase HIV Knowledge and Testing Among Latinx Sexual Minority Men and Transgender Women: A Quasi-Experimental Pilot Study

OBJECTIVE

To determine how weekly text messages and small incentives impact HIV knowledge and frequency of HIV testing among Latinx sexual minority men (LSMM) and transgender women (LTGW).

DESIGN

Prospectively randomized participants into 2 intervention arms compared with a nonrandomized comparison group.

SETTING

Bienestar, a primarily Latinx focused HIV service provider located across Los Angeles County.

SUBJECTS, PARTICIPANTS

Two hundred eighteen participants self-identifying as LSMM or LTGW, HIV negative, having regular mobile phone access, ≥18 years, and fluent in English or Spanish.

INTERVENTION

The "information only" (IO) group received text messages with HIV prevention information. The "information plus" (IP) group additionally could win incentives by answering weekly quiz questions correctly and testing for HIV once every 3 months. We followed participants for 12 months.

MAIN OUTCOME MEASURE(S)

HIV knowledge and frequency of HIV testing.

RESULTS

We found no effect on HIV knowledge in the IO group but a statistically significant improvement in the IP group (79.2%-88.1%; P = 0.007). The frequency of HIV testing was higher in both intervention groups relative to the comparison group: On average, 22.0% of IO participants and 24.9% of IP participants tested at a Bienestar site within a given 3-month period, compared with 13.0% in the comparison group. This represents unadjusted relative risk ratios of 1.69 for the IO group (95% CI: 1.25 to 2.1; P < 0.01) and 1.91 for the IP group (95% CI: 1.51 to 2.31; P < 0.01), respectively.

CONCLUSIONS

This study demonstrates that a simple, low-cost intervention may help increase HIV testing frequency among LSMM and LTGW, 2 groups at high HIV risk.

The General Public's Support Toward Governmental Provision of Free/Subsidized HIV Preexposure Prophylaxis to At-Risk Chinese People: A Population-Based Study

BACKGROUND

Given its high cost, governmental financing is essential for promoting HIV preexposure prophylaxis (PrEP). The study investigated levels and associated factors of the general public's support toward governmental provision of free or subsidized PrEP to Chinese people at high risk of HIV.

METHODS

A population-based random telephone survey was conducted among 300 residents in Hong Kong, China, from June to July, 2019. Descriptive analyses and logistic regression were performed.

RESULTS

The prevalence rates of supportive attitude for free and subsidized PrEP were 30.0% and 30.3%, respectively; opinions were split, as similar proportions showed oppositional attitude. Those who were older, had less education, did not have a full-time job, or reported a lower household income were less likely to support free or subsidized PrEP. Stigmatizing attitudes against homosexuals (adjusted odds ratio [AOR], 0.81; 95% CI, 0.73-0.89) and perceived negative societal impacts of free PrEP (AOR, 0.78; 95% CI, 0.70-0.87) were negatively associated with the support for free PrEP. Compassion to others (AOR, 1.10; 95% CI, 1.01-1.21), perceived positive societal impacts of free PrEP (AOR, 1.86; 95% CI, 1.43-2.44), and the belief that the positive impacts would overweigh the negative impacts (AOR, 26.97; 95% CI, 10.66-68.24) were positively associated with the support for free PrEP. Similar associations were observed for the support toward subsidized PrEP.

CONCLUSIONS

The Hong Kong general public's support for government financial assistance of PrEP for people at high risk of HIV was low. Preexposure prophylaxis advocacy campaigns are warranted and suggested to incorporate components that address the associated factors.

The acceptability and feasibility of a pilot study examining the impact of a mobile technology-based intervention informed by behavioral economics to improve HIV knowledge and testing frequency among Latinx sexual minority men and transgender women

Background

We developed a novel intervention that uses behavioral economics incentives and mobile-health text messages to increase HIV knowledge and testing frequency among Latinx sexual minority men and Latinx transgender women. Here we provide a theoretically-grounded assessment regarding the intervention’s acceptability and feasibility.

Methods

We conducted 30-min exit interviews with a stratified sample of participants (n = 26 Latinx sexual minority men, 15 Latinx transgender women), supplemented with insights from study staff (n = 6). All interviews were recorded, transcribed, and translated for a content analysis using Dedoose. Cohen’s Kappa was 89.4% across coded excerpts. We evaluated acceptability based on how participants cognitively and emotionally reacted to the intervention and whether they considered it to be appropriate. We measured feasibility based on resource, scientific and process assessments (e.g., functionality of text messaging service, feedback on study recruitment procedures and surveys).

Results

Regarding acceptability, most participants clearly understood the intervention as a program to receive information about HIV prevention methods through text messages. Participants who did not complete the intervention shared they did not fully understand what it entailed at their initial enrollment, and thought it was a one-time engagement and not an ongoing program. Though some participants with a higher level of education felt the information was simplistic, most appreciated moving beyond a narrow focus on HIV to include general information on sexually transmitted infections; drug use and impaired sexual decision-making; and differential risks associated with sexual positions and practices. Latinx transgender women in particular appreciated receiving information about Pre-Exposure Prophylaxis. While participants didn’t fully understand the exact chances of winning a prize in the quiz component, most enjoyed the quizzes and chance of winning a prize. Participants appreciated that the intervention required a minimal time investment. Participants shared that the intervention was generally culturally appropriate. Regarding feasibility, most participants reported the text message platform worked well though inactive participants consistently said technical difficulties led to their disengagement. Staff shared that clients had varying reactions to being approached while being tested for HIV, with some unwilling to enroll and others being very open and curious about the program. Both staff and participants relayed concerns regarding the length of the recruitment process and study surveys.

Conclusions

Our theoretically-grounded assessment shows the intervention is both acceptable and feasible.

Trial registration

The trial was registered on May 5, 2017 with the ClinicalTrials.gov registry [NCT03144336].

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-021-10335-5.

Viral Pandemics of the Last Four Decades: Pathophysiology, Health Impacts and Perspectives

The twenty-first century has witnessed some of the deadliest viral pandemics with far-reaching consequences. These include the Human Immunodeficiency Virus (HIV) (1981), Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) (2002), Influenza A virus subtype H1N1 (A/H1N1) (2009), Middle East Respiratory Syndrome Coronavirus (MERS-CoV) (2012) and Ebola virus (2013) and the Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) (2019-present). Age- and gender-based characterizations suggest that SARS-CoV-2 resembles SARS-CoV and MERS-CoV with regard tohigher fatality rates in males, and in the older population with comorbidities. The invasion-mechanism of SARS-CoV-2 and SARS-CoV, involves binding of its spike protein with angiotensin-converting enzyme 2 (ACE2) receptors; MERS-CoV utilizes dipeptidyl peptidase 4 (DPP4), whereas H1N1 influenza is equipped with hemagglutinin protein. The viral infections-mediated immunomodulation, and progressive inflammatory state may affect the functions of several other organs. Although no effective commercial vaccine is available for any of the viruses, those against SARS-CoV-2 are being developed at an unprecedented speed. Until now, only Pfizer/BioNTech's vaccine has received temporary authorization from the UK Medicines and Healthcare products Regulatory Agency. Given the frequent emergence of viral pandemics in the 21st century, proper understanding of their characteristics and modes of action are essential to address the immediate and long-term health consequences.

Gender, HIV knowledge and prevention attitudes among adolescents living with HIV participating in an economic empowerment intervention in Uganda

HIV disproportionately affect adolescent girls and young women in sub-Saharan Africa. In Uganda, the HIV prevalence is four times higher in adolescent girls compared to boys. This study examined gender, HIV general and clinical knowledge, and prevention attitudes among adolescents living with HIV in Uganda. Data from a cluster randomized clinical trial were analyzed. A total of 702 adolescents (average age of 12.4) were randomized to either a control arm receiving bolstered standard of care or the treatment arm receiving bolstered standard of care plus a family economic empowerment intervention to support medication adherence. Ordinary Least Squares models that adjust for clustering of adolescents within health clinics were conducted. No gender differences were observed in HIV knowledge and prevention attitudes at baseline. However, at 12-months follow-up, boys were more likely than girls to report correct HIV general knowledge (d = 0.21), clinical knowledge (d = 0.48), and favorable prevention attitudes (d = 0.27). The intervention was not associated with any of the outcomes. Given the high HIV prevalence among adolescents, specifically girls, there is need to develop and/or tailor existing programs and interventions that equip adolescent girls with comprehensive knowledge and prevention attitudes, that are culturally appropriate, to reduce HIV transmission and reinfection within this population.

Availability, Accessibility, and Coverage of Needle and Syringe Programs in Prisons in the European Union

Needle and syringe programs (NSPs) are among the most effective interventions for controlling the transmission of infection among people who inject drugs in prisons. We evaluated the availability, accessibility, and coverage of NSPs in prisons in European Union (EU) countries. In line with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria, we systematically searched 4 databases of peer-reviewed publications (MEDLINE (PubMed), ISI Web of Science, EBSCO, and ScienceDirect) and 53 databases containing gray literature to collect data published from January 2008 to August 2018. A total of 23,969 documents (17,297 papers and 6,672 gray documents) were identified, of which 26 were included in the study. In 2018, imprisonment rates in 28 EU countries ranged between 51 per 100,000 population in Finland and 235 per 100,000 population in Lithuania. Only 4 countries were found to have NSPs in prisons: Germany (in 1 prison), Luxembourg (no coverage data were found), Romania (available in more than 50% of prisons), and Spain (in all prisons). Portugal stopped an NSP after a 6-month pilot phase. Despite the protective impact of prison-based NSPs on infection transmission, only 4 EU countries distribute sterile syringes among people who inject drugs in prisons, and coverage of the programs within these countries is very low. Since most prisoners will eventually return to the community, lack of NSPs in EU prisons not only is a threat to the health of prisoners but also endangers public health.

Field Validation of Limiting-Antigen Avidity Enzyme Immunoassay to Estimate HIV-1 Incidence in Cross-Sectional Survey in Swaziland

Reliable and accurate laboratory assays to detect recent HIV-1 infection have potential as simple and practical methods of estimating HIV-1 incidence in cross-sectional surveys. This study describes validation of the limiting-antigen (LAg) avidity enzyme immunoassay (EIA) in a cross-sectional national survey, conducted in Swaziland, comparing it to prospective follow-up incidence. As part of the Swaziland HIV-1 Incidence Measurement Survey (SHIMS), 18,172 individuals underwent counseling and HIV rapid testing in a household-based, population survey conducted from December 2010 to June 2011. Plasma samples from HIV-positive persons were classified as recent infections using an incidence testing algorithm with LAg-Avidity EIA (normalized optical density ≤1.5) followed by viral load (VL ≥1,000 copies/mL). All HIV-seronegative samples were tested for acute HIV-1 infection by nucleic acid amplification test (NAAT) pooling. HIV-seronegative individuals who consented to follow-up were retested ∼6 months later to detect observed HIV-1 seroconversion. HIV-1 incidence estimates based on LAg+VL and NAAT were calculated using assay-specific parameters and were compared with prospective incidence estimate. A total of 5,803 (31.9%) of 18,172 survey participants tested HIV seropositive; of these 5,683 (97.9%) were further tested with LAg+VL algorithm. The weighted annualized incidence from the longitudinal cohort study was 2.4% (95% confidence interval 2.0-2.7). Based on cross-sectional testing of HIV positives with LAg+VL algorithm, overall weighted annualized HIV-1 incidence was 2.5% (2.0-3.0), whereas NAAT-based incidence was of 2.6%. In addition, LAg-based incidence in men (1.8%; 1.2-2.5) and women (3.2%; 2.4-3.9) were similar to estimates based on observed incidence (men = 1.7%, women = 3.1%). Changes in HIV-1 incidence with age in men and women further validate plausibility of the algorithm. These results demonstrate that the LAg EIA, in a serial algorithm with VL, is a cost-effective tool to estimate HIV-1 incidence in cross-sectional surveys.

Rationale and design of an integrated bio-behavioral approach to improve adherence to pre-exposure prophylaxis and HIV risk reduction among opioid-dependent people who use drugs: The CHRP-BB study

BACKGROUND

Few primary HIV prevention strategies have successfully integrated both behavioral and biomedical components, with modest HIV risk reduction outcomes among opioid-dependent people who use drugs (PWUD). In response to this unmet need, we developed a brief, bio-behavioral intervention to simultaneously promote PrEP adherence and reduce HIV risk among opioid-dependent PWUD.

METHODS

Using a Hybrid Type I implementation science design, we will examine the efficacy of the integrated bio-behavioral, Community-friendly Health Recovery Program (CHRP-BB) compared to a time-and-attention matched control condition among HIV-negative, opioid-dependent PWUD who are prescribed PrEP and enrolled in a methadone maintenance program (MMP) using a randomized controlled trial (RCT). Participants are assessed at baseline, immediately post-intervention (8 weeks) and follow-ups at weeks 20, 32, and 44 post-intervention. The primary outcome is biomedical (PrEP adherence), with secondary outcomes including behavioral (self-reported drug- and sex-related HIV risk behaviors), ongoing drug use (confirmed with urine drug testing), and related domains of the theoretical information-motivation-behavioral skills (IMB) model of behavior change related to PrEP adherence and HIV-transmission-risk reduction. Additionally, we will conduct a process evaluation of delivery/implementation of the intervention to collect valuable information to be used in future implementation.

CONCLUSIONS

This study will be among the first prospective trial to test an integrated bio-behavioral intervention to improve adherence to PrEP and HIV risk reduction among opioid-dependent PWUD.

A Pilot Intervention Trial to Promote Sexual Health and Stress Management Among HIV-Infected Men Who Have Sex with Men

Men who have sex with men (MSM) experience HIV disparities. This study pilot-tested a two session, group-delivered intervention to promote sexual health and stress management skills for HIV-infected MSM. Participants (N = 80) were randomized to an immediate or delayed intervention condition. Analyses of covariance examined intervention efficacy. Compared to the delayed condition, intervention condition participants reported: greater HIV transmission knowledge (p < .001), higher HIV disclosure self-efficacy (p = .004), stronger intentions to refuse unprotected sex (p = .05), decreased frequency of unprotected anal or oral sex (p = .03), decreased perceived stress levels (p = .03), and higher coping self-efficacy (p = .003). Differences in the number of unprotected anal sex episodes, condom attitudes, and level of social support did not differ between conditions. Findings provide evidence of intervention acceptability and suggest the brief intervention may enhance stress management skills and modify sexual risk behavior antecedents for HIV-infected MSM.

Behavioral economics-based incentives supported by mobile technology on HIV knowledge and testing frequency among Latino/a men who have sex with men and transgender women: Protocol for a randomized pilot study to test intervention feasibility and acceptability

Background

Mobile Technology and Incentives (MOTIVES) is a randomized pilot study of a mobile technology-based and behavioral economics-supported HIV prevention intervention. Behavioral economics (BE) uses financial incentives in a way that departs from the traditional focus on large monetary payments. Instead, BE suggests that relatively small “nudges” can effectively initiate and sustain behavior change. This pilot study examines the feasibility and acceptability of an HIV prevention intervention that uses text messages in combination with BE incentives to improve retention of HIV prevention information and increase frequency of HIV testing among Latino/a men who have sex with men (MSM) and transgender women (TGW). The pilot will also estimate mission-critical design parameters with point and confidence interval estimates of the intervention to inform a future, fully powered effectiveness study.

Methods

The project will be conducted in collaboration with Bienestar Human Services, Inc. (Bienestar), a non-profit community-based service organization. The intervention is being tested in a small, randomized controlled trial to pilot the intervention’s feasibility and acceptability among 200 Latino/a MSM and TGW from Bienestar’s HIV testing sites. Information on feasibility will include recruitment, refusal, and retention rates as well as message sending success rates; acceptability will include perceived appropriateness based on responses to the intervention. Participants will be randomized into either the “information only” control group (e.g. receiving text messages with HIV prevention information) or the “information plus” intervention group (e.g. additionally receiving quiz questions that provide the possibility of winning prizes). Participants will be followed for 12 months from enrollment. In addition to using data abstracted from Bienestar’s routine data collection mechanisms, we will also collect survey data (blinded outcome assessment) from participants at 0, 6, and 12 months to provide an initial assessment of whether incentives affect their level of HIV knowledge and testing frequency.

Discussion

If shown to be acceptable, feasible, and resource-efficient, MOTIVES will provide an innovative way to communicate the latest HIV prevention information and support trimestral HIV screening among Latino/a MSM and TGW.

Trial registration

ClinicalTrials.gov, NCT03144336. Registered on 5 May 2017.

Integrated Bio-behavioral Approach to Improve Adherence to Pre-exposure Prophylaxis and Reduce HIV Risk in People Who Use Drugs: A Pilot Feasibility Study

This study reports the feasibility, acceptability, and preliminary efficacy of the bio-behavioral community-friendly health recovery program-an integrated, HIV prevention intervention to improve pre-exposure prophylaxis (PrEP) adherence and HIV-risk reduction behaviors among high-risk people who use drugs. We used a within-subjects, pretest-posttest follow-up design to recruit participants, who were HIV-uninfected, methadone-maintained and reported HIV-risk behaviors and had initiated PrEP (n = 40; males: 55%). Participants were assessed at baseline (T₀), immediately post-intervention (4 weeks: T₄) and 4 weeks post-intervention (T₈). Immediately after completing the four weekly intervention groups, participants underwent a post-intervention assessment including in-depth qualitative interviews. Feasibility was high, assessed by participant willingness to enroll (90.1%) and retention (95%). Results showed that participants were highly satisfied and perceived the intervention as valuable and acceptable [mean: 81.3 (range 0-100)]. Significant enhancements in self-reported PrEP adherence [F(2,74) = 7.500, p = 0.001] and PrEP-related knowledge [F(2,74) = 3.828, p = 0.026] were observed. Drug-related (e.g., injection of drugs, sharing of injection equipment) and sex-related (e.g., number of sexual partners, condomless sex) risk behaviors were reduced, while information, motivation, and behavioral skills (IMB) constructs increased. The results support feasibility and high acceptability and support further examination of the efficacy of this combination bio-behavioral intervention in a prospective clinical trial.

Exploring the Use of Pre-exposure Prophylaxis (PrEP) for HIV Prevention Among High-Risk People Who Use Drugs in Treatment

Introduction: Despite unequivocal evidence supporting the use of pre-exposure prophylaxis (PrEP), its scale-up has been gradual overall, and nearly absent among people who use drugs (PWUD). In the present study, we implemented the use of PrEP, as a part of an integrated HIV prevention approach, and explored the experiences and attitudes related to PrEP use among PWUD.

Methods: Between September 2016 and July 2017, we recruited 40 HIV-uninfected, methadone-maintained people, who reported HIV-risk behaviors, and were currently taking PrEP. We conducted both quantitative and in-depth semi-structured qualitative interviews that primarily focused on experiences, attitudes, acceptability, disclosure status, risk compensation-related attitudes, and barriers related to PrEP adherence.

Results: Results showed that participants were highly satisfied and perceived PrEP as valuable and acceptable for HIV prevention. Participants reported high adherence to PrEP. The most highly endorsed facilitators to PrEP adherence were use of memory aids, no out-of-pocket cost, perceived benefit, and support from social network. The barriers to adherence included side-effects, stigmatization, requirement of daily dosing, and accessibility of PrEP services. Additionally, participants expressed disagreement with the overall risk compensation-related attitudes (i.e., decreased personal concern about engaging in HIV risk behavior due to their perception that PrEP is now fully protecting them from contracting HIV) and indicated no increased engagement in risk behaviors while on PrEP.

Conclusions: The results from the current study provide preliminary evidence supporting the successful integration of PrEP within the substance abuse treatment setting, where high risk PWUD are concentrated.

High prevalence of syndemic health problems in patients seeking post-exposure prophylaxis for sexual exposures to HIV

Introduction

The standard clinical approach to non-occupational HIV post-exposure prophylaxis (nPEP) focuses on biomedical aspects of the intervention, but may overlook co-occurring or ‘syndemic’ psychosocial problems that reinforce future vulnerability to HIV. We therefore sought to determine the prevalence of syndemic health problems in a cohort of Ontario nPEP patients, and explored the relationship between syndemic burden and HIV risk.

Methods

Between 07/2013-08/2016, we distributed a self-administered questionnaire to patients presenting to three clinics in Toronto and Ottawa seeking nPEP for sexual HIV exposures. We used validated screening tools to estimate the prevalence of depression (CES-D score ≥16), harmful alcohol use (AUDIT ≥8), problematic drug use (DUDIT ≥6 men/≥2 women), and sexual compulsivity (SCS ≥24) among men who have sex with men (MSM) respondents. In exploratory analyses, we examined the relationships between syndemic conditions using univariable logistic regression models, and the relationship between syndemic count (total number of syndemic conditions per participant) and HIV risk, as estimated by the HIRI-MSM score, using linear regression models.

Results

The 186 MSM included in the analysis had median age 31 (IQR = 26–36), including 87.6% having a college/undergraduate degree or higher. Overall, 53.8% screened positive for depression, 34.4% for harmful alcohol use, 30.1% for problematic drug use, and 16.1% for sexual compulsivity. Most participants (74.2%) had at least one syndemic condition and 46.8% had more than one. Exploratory analyses suggested positive associations between depression and harmful alcohol use (OR = 2.11, 95%CI = 1.13, 3.94) and between harmful alcohol use and problematic drug use (OR = 1.22, 95%CI = 0.65, 2.29). Syndemic count was associated with increased HIRI-MSM risk scores in univariable (2.2, 95%CI = 1.0, 3.3 per syndemic condition) and multivariable (2.1, 95%CI = 0.6, 3.6) linear regression models.

Conclusions

The prevalence of syndemic conditions in MSM seeking nPEP for sexual exposure is alarmingly high, and is associated with underlying HIV risk. Routine screening for these conditions may identify opportunities for intervention and could alleviate future vulnerability to HIV.

Betting on the fastest horse: Using computer simulation to design a combination HIV intervention for future projects in Maharashtra, India

Objective

To inform the design of a combination intervention strategy targeting HIV-infected unhealthy alcohol users in Maharashtra, India, that could be tested in future randomized control trials.

Methods

Using probabilistic compartmental simulation modeling we compared intervention strategies targeting HIV-infected unhealthy alcohol users on antiretroviral therapy (ART) in Maharashtra, India. We tested interventions targeting four behaviors (unhealthy alcohol consumption, risky sexual behavior, depression and antiretroviral adherence), in three formats (individual, group based, community) and two durations (shorter versus longer). A total of 5,386 possible intervention combinations were tested across the population for a 20-year time horizon and intervention bundles were narrowed down based on incremental cost-effectiveness analysis using a two-step probabilistic uncertainty analysis approach.

Results

Taking into account uncertainty in transmission variables and intervention cost and effectiveness values, we were able to reduce the number of possible intervention combinations to be used in a randomized control trial from over 5,000 to less than 5. The most robust intervention bundle identified was a combination of three interventions: long individual alcohol counseling; weekly Short Message Service (SMS) adherence counseling; and brief sex risk group counseling.

Conclusions

In addition to guiding policy design, simulation modeling of HIV transmission can be used as a preparatory step to trial design, offering a method for intervention pre-selection at a reduced cost.

Beyond "Option B+": Understanding Antiretroviral Therapy (ART) Adherence, Retention in Care and Engagement in ART Services Among Pregnant and Postpartum Women Initiating Therapy in Sub-Saharan Africa

BACKGROUND

Several studies from sub-Saharan Africa have highlighted significant challenges in providing antiretroviral therapy (ART) to pregnant and postpartum women, with specific concerns around maintaining optimal levels of adherence to ART and/or retaining women in long-term services. However, there are few conceptual frameworks to help understand nonadherence and nonretention, as well as the drivers of these, among HIV-infected women, particularly in the postpartum period.

METHODS

This review provides an overview of the key issues involved in thinking about ART adherence, retention in care and engagement in ART services among pregnant and postpartum women.

RESULTS

The related behaviors of adherence and retention may be understood as components of effective engagement of patients in ART services, which share the goal of achieving and maintaining suppressed maternal viral load on ART. Under this framework, the existing literature indicates that disengagement from care is widespread among postpartum women, with strikingly similar data emerging from ART services around the globe and indications that similar challenges may be encountered by postpartum care services outside the context of HIV. However, the drivers of disengagement require further research, and evidence-based intervention strategies are limited.

CONCLUSIONS

The challenges of engaging women in ART services during pregnancy and the postpartum period seem pervasive, although the determinants of these are poorly understood. Looking forward, a host of innovative intervention approaches are needed to help improve women's engagement, and in turn, promote maternal and child health in the context of HIV.

Developing an Integrated, Brief Biobehavioral HIV Prevention Intervention for High-Risk Drug Users in Treatment: The Process and Outcome of Formative Research

To date, HIV prevention efforts have largely relied on singular strategies (e.g., behavioral or biomedical approaches alone) with modest HIV risk-reduction outcomes for people who use drugs (PWUD), many of whom experience a wide range of neurocognitive impairments (NCI). We report on the process and outcome of our formative research aimed at developing an integrated biobehavioral approach that incorporates innovative strategies to address the HIV prevention and cognitive needs of high-risk PWUD in drug treatment. Our formative work involved first adapting an evidence-based behavioral intervention-guided by the Assessment-Decision-Administration-Production-Topical experts-Integration-Training-Testing model-and then combining the behavioral intervention with an evidence-based biomedical intervention for implementation among the target population. This process involved eliciting data through structured focus groups (FGs) with key stakeholders-members of the target population (n = 20) and treatment providers (n = 10). Analysis of FG data followed a thematic analysis approach utilizing several qualitative data analysis techniques, including inductive analysis and cross-case analysis. Based on all information, we integrated the adapted community-friendly health recovery program-a brief evidence-based HIV prevention behavioral intervention-with the evidence-based biomedical component [i.e., preexposure prophylaxis (PrEP)], an approach that incorporates innovative strategies to accommodate individuals with NCI. This combination approach-now called the biobehavioral community-friendly health recovery program-is designed to address HIV-related risk behaviors and PrEP uptake and adherence as experienced by many PWUD in treatment. This study provides a complete example of the process of selecting, adapting, and integrating the evidence-based interventions-taking into account both empirical evidence and input from target population members and target organization stakeholders. The resultant brief evidence-based biobehavioral approach could significantly advance primary prevention science by cost-effectively optimizing PrEP adherence and HIV risk reduction within common drug treatment settings.

Intent to Use Preexposure Prophylaxis (PrEP), HIV Risk Behaviors, and Self-Report Neurocognitive Symptoms by High-Risk Drug Users: A Mediation Analysis

Neurocognitive impairment (NCI) and HIV risk are significant correlates of intent to use preexposure prophylaxis (PrEP). The extent to which similar outcomes could occur when these factors operate together, particularly for people who use drugs (PWUD), remains an important unanswered question. We therefore sought evidence that HIV risk behavior mediated the relationship between NCI and intent to use PrEP in high-risk PWUD in treatment. HIV-uninfected, methadone-maintained people who reported HIV-risk behaviors were enrolled (n = 400). Variables of interest (NCI, HIV risk behaviors, intent to use PrEP) were assessed using audio computer-assisted self-interview. We found preliminary evidence of indirect effect of HIV risk behaviors, such that NCI had an increased impact on intent to use PrEP via HIV risk behaviors. As a result of having this information, clinicians and researchers will be better equipped for evidence-informed targeting and dissemination efforts to optimize PrEP uptake by this underserved population.

Interventions to improve psychosocial well-being for children affected by HIV and AIDS: a systematic review

In addition to its contribution to child mortality, HIV/AIDS has a substantial impact on the psychosocial well-being of children across the globe and particularly in sub-Saharan Africa. We conducted a systematic review of the literature in order to identify studies that assess the effectiveness of interventions developed to improve the psychosocial well-being of children affected by HIV/AIDS, published between January 2008 and February 2016. Studies that were eligible for the review included male and/or female children under the age of 18 years of age, who had lost a parent to HIV/AIDS, were living with a parent with HIV/AIDS, or were vulnerable because of other social and economic factors and living in communities of high HIV and AIDS prevalence, including child and caregiver reports. Studies were included if they documented any intervention to improve the psychosocial well-being of children including psychological therapy, psychosocial support and/or care, medical interventions and social interventions, with psychological and/or social factors as outcomes. We identified 17 interventions to improve the psychosocial well-being of children affected by HIV/AIDS. Of these, 16 studies took place in eight different low and middle-income countries (LMIC), of which 6 were in southern and eastern Africa. One study took place in a high-income setting. Of the total, fifteen showed some significant benefits of the intervention, while two showed no difference to psychosocial outcomes as a result of the intervention. The content of interventions, dosage and length of follow up varied substantially between studies. There were few studies on children under seven years and several focused mostly on girls. Efforts to improve evaluation of interventions to improve the psychosocial well-being of children affected by HIV/AIDS have resulted in a number of new studies which met the inclusion criteria for the review. Most studies are specially designed research projects and not evaluations of existing services. We call for increased partnerships between policy-makers, practitioners and researchers in order to design evaluation studies and can feed into the growing evidence base.

Re-focusing HIV prevention messages: a qualitative study in rural Uganda

Background

After 30 years, the human immunodeficiency virus (HIV) remains an epidemic of global concern. To support the increasing emphasis on biomedical interventions for prevention requires a renewed and reframed focus on HIV prevention messages to motivate engagement in risk-reduction activities. This paper examines youth and adult perceptions of HIV prevention messages and HIV risk assessment in a generalized HIV epidemic context in Uganda.

Methods

We conducted 24 focus group discussions and 24 in-depth interviews with 15–45 year olds (n = 218) from three communities in the Rakai district of Uganda in 2012.

Results

We found generational differences in the how people viewed HIV, skepticism around introduction of new interventions, continued misconceptions and fears about condoms, and gender differences in content and salience of HIV prevention messages.

Conclusions

Shifts in HIV education are needed to address gaps in HIV messaging to foster engagement in risk reduction strategies and adoption of newer biomedical approaches to HIV prevention.

Prevention literacy: community-based advocacy for access and ownership of the HIV prevention toolkit

Introduction

Critical technological advances have yielded a toolkit of HIV prevention strategies. This literature review sought to provide contextual and historical reflection needed to bridge the conceptual gap between clinical efficacy and community effectiveness (i.e. knowledge and usage) of existing HIV prevention options, especially in resource-poor settings.

Methods

Between January 2015 and October 2015, we reviewed scholarly and grey literatures to define treatment literacy and health literacy and assess the current need for literacy related to HIV prevention. The review included searches in electronic databases including MEDLINE, PsycINFO, PubMed, and Google Scholar. Permutations of the following search terms were used: “treatment literacy,” “treatment education,” “health literacy,” and “prevention literacy.” Through an iterative process of analyses and searches, titles and/or abstracts and reference lists of retrieved articles were reviewed for additional articles, and historical content analyses of grey literature and websites were additionally conducted.

Results and discussion

Treatment literacy was a well-established concept developed in the global South, which was later partially adopted by international agencies such as the World Health Organization. Treatment literacy emerged as more effective antiretroviral therapies became available. Developed from popular pedagogy and grassroots efforts during an intense struggle for treatment access, treatment literacy addressed the need to extend access to underserved communities and low-income settings that might otherwise be excluded from access. In contrast, prevention literacy is absent in the recent surge of new biomedical prevention strategies; prevention literacy was scarcely referenced and undertheorized in the available literature. Prevention efforts today include multimodal techniques, which jointly comprise a toolkit of biomedical, behavioural, and structural/environmental approaches. However, linkages to community advocacy and mobilization efforts are limited and unsustainable. Success of prevention efforts depends on equity of access, community-based ownership, and multilevel support structures to enable usage and sustainability.

Conclusions

For existing HIV prevention efforts to be effective in “real-world” settings, with limited resources, reflection on historical lessons and contextual realities (i.e. policies, financial constraints, and biomedical patents) indicated the need to extend principles developed for treatment access and treatment literacy, to support prevention literacy and prevention access as an integral part of the global response to HIV.

Pre-exposure Prophylaxis Awareness Among Gay and Other Men who have Sex with Men in Vancouver, British Columbia, Canada

Men who have sex with men (MSM) account for approximately half of Canada's new HIV infections. Pre-exposure prophylaxis (PrEP), a recently established and effective HIV prevention tool for MSM is currently not approved nor publicly funded. We recruited MSM via respondent-driven sampling to complete a self-administered computer-based interview. Stratified by HIV status, multivariable logistic regression identified factors associated with PrEP awareness. Of 673 participants, 102/500 (20.9 %) HIV-negative and 63/173 (26.5 %) HIV-positive men were aware of PrEP, but none had used it. One third of PrEP-aware MSM spoke about it with friends or sex partners. Self-declared knowledge was limited. Factors associated with PrEP awareness varied by HIV status, but included greater HAART optimism for HIV-negative MSM. Among HIV-negative MSM, being PrEP unaware was associated with younger age, not always having condoms, and preferring receptive versus insertive anal sex. Future longitudinal research should identify early adopters of PrEP and its associated impacts.

Implementation Research for the Prevention of Mother-to-Child HIV Transmission in Sub-Saharan Africa: Existing Evidence, Current Gaps, and New Opportunities

Tremendous gains have been made in the prevention of mother-to-child HIV transmission (PMTCT) in sub-Saharan Africa. Ambitious goals for the "virtual elimination" of pediatric HIV appear increasingly feasible, driven by new scientific advances, forward-thinking health policy, and substantial donor investment. To fulfill this promise, however, rapid and effective implementation of evidence-based practices must be brought to scale across a diversity of settings. The discipline of implementation research can facilitate this translation from policy into practice; however, to date, its core principles and frameworks have been inconsistently applied in the field. We reviewed the recent developments in implementation research across each of the four "prongs" of a comprehensive PMTCT approach. While significant progress continues to be made, a greater emphasis on context, fidelity, and scalability-in the design and dissemination of study results-would greatly enhance current efforts and provide the necessary foundation for future evidence-based programs.

Love, Trust, and HIV Risk Among Female Sex Workers and Their Intimate Male Partners

OBJECTIVES

We examined correlates of love and trust among female sex workers and their noncommercial male partners along the Mexico-US border.

METHODS

From 2011 to 2012, 322 partners in Tijuana and Ciudad Juárez, Mexico, completed assessments of love and trust. Cross-sectional dyadic regression analyses identified associations of relationship characteristics and HIV risk behaviors with love and trust.

RESULTS

Within 161 couples, love and trust scores were moderately high (median 70/95 and 29/40 points, respectively) and correlated with relationship satisfaction. In regression analyses of HIV risk factors, men and women who used methamphetamine reported lower love scores, whereas women who used heroin reported slightly higher love. In an alternate model, men with concurrent sexual partners had lower love scores. For both partners, relationship conflict was associated with lower trust.

CONCLUSIONS

Love and trust are associated with relationship quality, sexual risk, and drug use patterns that shape intimate partners' HIV risk. HIV interventions should consider the emotional quality of sex workers' intimate relationships.

Biomedical HIV Prevention Including Pre-exposure Prophylaxis and Opiate Agonist Therapy for Women Who Inject Drugs: State of Research and Future Directions

Women who inject drugs (WWID) are at higher risk of HIV compared with their male counterparts as a result of multiple factors, including biological, behavioral, and sociostructural factors, yet comparatively little effort has been invested in testing and delivering prevention methods that directly target this group. In this article, we discuss the need for expanded prevention interventions for WWID, focusing on 2 safe, effective, and approved, yet underutilized biomedical prevention methods: opiate agonist therapy (OAT) and oral pre-exposure prophylaxis (PrEP). Although both interventions are well researched, they have not been well examined in the context of gender. We discuss the drivers of women injectors' higher HIV risk, review the effectiveness of OAT and PrEP interventions among women, and explain why these new HIV prevention tools should be prioritized for WWID. There is substantial potential for impact of OAT and PrEP programs for WWID in the context of broader gender-responsive HIV prevention initiatives. Although awaiting efficacy data on other biomedical approaches in the HIV prevention research "pipeline," we propose that the scale-up and implementation of these proven, safe, and effective interventions are needed now.