Pre-exposure Prophylaxis Continuum Research Articles

Engagement Along the PrEP Care Continuum Among Men Who Have Sex with Men in China: A Systematic Review and Meta-analysis.

Pre-exposure prophylaxis (PrEP), including daily oral, on-demand, and long-acting injectable (LAI), is a promising HIV prevention intervention for men who have sex with men (MSM). We conducted a systematic review on engagement with the PrEP continuum among MSM in China. A total of 756 studies were initially identified and 36 studies were included (N = 26,021). In the 20 studies (N = 13,886) examining PrEP awareness, 32.4% (95% CI: 25.1-40.7) of MSM were aware of PrEP. In the 25 studies (N = 18,587) examining willingness, 54.5% (95% CI: 41.9-66.5) MSM indicated they were willing to use PrEP. The pooled prevalence of PrEP uptake from 9 studies (N = 6,575) was 4.9% (95% CI: 1.4-15.8%), while pooled estimates of adequate adherence from five studies (N = 2,344) among MSM on PrEP was 40.7% (95% CI: 20.0-65.2%). Subgroup analyses suggested studies conducted after 2015 (versus before) tended to report higher awareness and uptake. Awareness was highest for daily oral PrEP, followed by on-demand, and LAI PrEP; willingness to use was highest for LAI PrEP. The operationalization of willingness and adherence constructs varied across studies and complicated the interpretation of pooled estimates. This review revealed gaps in the PrEP care continuum among MSM in China, with relatively low awareness and uptake (in contrast to willingness and adherence) as the major potential barriers to widespread implementation and the need for a unified approach to defining and measuring PrEP outcomes.

Barriers and Facilitators Along the PrEP Continuum of Care Among Latinx Sexual Minoritized Men and Transgender Women: A Systematic Review.

Latinx cisgender sexually minoritized men (SMM) and transgender women (TW) in the U.S. are disproportionately affected by HIV. Although pre-exposure prophylaxis (PrEP) is a highly effective strategy for HIV prevention, rates of PrEP use among Latinx SMM and TW remain suboptimal. The main purpose of this systematic review was to (1) describe engagement in the various stages of the PrEP care continuum among Latinx SMM and TW, and (2) identify multilevel determinants that function as barriers or facilitators to engagement in the PrEP continuum of care for Latinx SMM and TW. This review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Statement (PRISMA). Five databases (MEDLINE, CINAHL, PsycINFO, Embase, Scopus) were searched to examine the available qualitative, quantitative, and mixed method studies relevant to the research question. A total of 56 studies were included, with the majority focusing on SMM and being cross-sectional in design. Barriers included PrEP knowledge, risk perception, intersecting stigma, and structural conditions. Community resources, social support, and PrEP navigation services facilitated engagement in the PrEP continuum of care. This review highlights the complex factors that influence PrEP care engagement among Latinx SMM and TW. These findings call for comprehensive, multilevel approaches to address inequities disparities in PrEP care engagement among these groups.

Factors Influencing Engagement Across the Motivational PrEP Cascade Among Latino SMM: A Mixed-Methods Analysis from the Perspectives of Community Providers and Latino SMM.

Latino sexual minority men (SMM) are a highly vulnerable population to HIV, and while pre-exposure prophylaxis (PrEP) has emerged as a promising biomedical tool for HIV prevention among them, its utilization remains disproportionately low in this community despite its potential. Understanding the barriers along the PrEP continuum of care, known as the "PrEP cascade," is crucial for effectively implementing PrEP interventions. Therefore, the objective of our study was twofold: first, to explore the stage of Latino SMM in the PrEP cascade by examining disparities in demographics, social factors, and healthcare aspects; second, to gain insights from healthcare providers who have direct clinical experience with our population regarding the challenges faced by Latino SMM in accessing and adhering to PrEP. Based on the study findings, the majority of participants (n = 74; 49%) were in the contemplation stage, and only one in ten Latino SMM (10.6%) were currently adherent to PrEP. Compared to those who were at least second-generation, first-generation status had a positive association (B = 0.699, SE = 0.208, β = 0.351, p < .001) with engagement along the PrEP Contemplation Ladder. Conversely, having at least one parent who did not have legal residency, relative to those whose parents were both U.S. citizens or held legal residency documentation, was found to have a negative association (B = - 0.689, SE = 0.245, β = 0.245, p = .006) with engagement along the PrEP Contemplation Ladder. Additionally, discussing PrEP with a healthcare provider had a positive association (B = 0.374, SE = 0.179, β = 0.185, p = .038) with engagement along the PrEP Contemplation Ladder. Qualitative results from our study suggest that some Latinos who initially agreed to start using PrEP ended up getting lost in the care pipeline and failed to attend their scheduled appointments. Providers also noted that many patients lacked access to a pharmacy where they felt comfortable obtaining their PrEP prescription, leading them to discontinue use after only a few months. These findings emphasize the importance of considering the unique needs, culture, and background of Latinos, including care delivery and provider attitudes that can facilitate progress through the PrEP cascade.

Inequities Along the Human Immunodeficiency Virus (HIV) Pre-exposure Prophylaxis Services Continuum for Black Women in the United States, 2015-2020.

To estimate the number of women who received human immunodeficiency virus (HIV) and sexually transmitted infection (STI) testing and HIV pre-exposure prophylaxis (PrEP) services by race and ethnicity in seven THRIVE (Targeted Highly Effective Interventions to Reverse the HIV Epidemic)-funded jurisdictions and to estimate associations of age and syphilis and gonorrhea diagnoses with receipt of HIV PrEP services. We analyzed data collected from 2015 to 2020 in Birmingham, Alabama; Baltimore City, Maryland; Washington, DC, New Orleans, Louisiana; Brooklyn, New York; Philadelphia, Pennsylvania; and Hampton Roads, Virginia. We compared Black women and women of additional racial and ethnic groups by age, HIV status at enrollment, receipt of STI testing and test positivity, and steps in the PrEP continuum (screened, eligible, referred, linked, and prescribed). We also examined the association of age, syphilis, or gonorrhea with the following steps in the PrEP continuum: screened, referred, linked, and prescribed. Black women made up 69.2% (8,758/12,647) of women served in THRIVE. Compared with non-Black women, Black women were more likely to have a positive test result for syphilis (3.3% vs 2.1%), gonorrhea (4.9% vs 3.5%), chlamydia (5.1% vs 1.9%), or more than one STI (1.4% vs 0.3%). Among women with negative HIV test results or unknown HIV status, Black women were more likely to be screened for PrEP eligibility (88.4% vs 64.9%). Among Black women, the proportion screened for PrEP was higher among those diagnosed with syphilis (97.3%) or gonorrhea (100%) than among those without an STI (88.1% and 87.8%, respectively). Among 219 Black women who presented with syphilis, only 10 (4.6%) were prescribed PrEP; among 407 with gonorrhea, only 11 (2.7%) were prescribed PrEP. Although most Black women seeking services received STI testing, the proportion of Black women who were eligible for PrEP and prescribed PrEP was low. To achieve national HIV-prevention goals, it is imperative that Black women have access to PrEP information and services.

"Protected Means Armed": Perspectives on Pre-Exposure Prophylaxis (PrEP) Among Women Who Engage in Sex Work and Use Drugs in Kazakhstan.

Pre-exposure prophylaxis (PrEP) for HIV prevention has recently become available in Kazakhstan, but women engaged in sex work who use drugs (WESW-UD) could benefit from tailored approaches to support uptake and adherence. To better understand how best to support WESW-UD at each stage of the PrEP continuum (awareness, acceptability, uptake, and adherence), we analyzed data from 30 in-depth interviews and four focus groups with 48 WESW-UD from two cities in Kazakhstan. We conducted thematic analysis to characterize perceptions, barriers, and motivators within each step of the PrEP continuum. Participants reported low awareness, but high interest in PrEP. Motivating factors included optimizing health and increased confidence. Participants expressed many preferences and concerns regarding PrEP modality and delivery. Participants also described how organizational mistrust and social support can prevent or facilitate PrEP uptake or adherence. Kazakhstan's scale-up of PrEP should consider the needs and preferences of WESW-UD to ensure equitable access.

A Scoping Review of Biobehavioural Interventions to Improve PrEP Continuum of Care in Latin America.

According to the literature, biobehavioural interventions or combined strategies would reduce the risk of HIV infection by more than 7,000 new cases each day, which would contribute to the battle facing Latin America, where despite the high incidence and prevalence of HIV in the region, access to PrEP (pre-exposure prophylaxis) is very limited. The objective of this research was, consistent with the PRISMA guidelines (Preferred Reporting Items for Systematic Reviews and Meta-Analyses), to conduct a scoping review to assess the evidence of available outcome data on biobehavioural interventions and programs to address gaps in the PrEP continuum of care in Latin America. The search was conducted in the databases EBSCOhost, WoS, Scopus, and ProQuest, and include all studies published from 2010 to 2021. One hundred eighty-six studies were identified and evaluated according to the eligibility criteria in six stages starting with the elimination of duplicates until the selection of studies that met the previously mentioned criteria; at the end five studies were chosen which were submitted to the methodological quality assessment including compliance with ethical guidelines. Results show that biobehavioural interventions promoting PrEP in Latin America are effective in increasing condom use, decreasing HIV risk, and increasing PrEP awareness, uptake, adherence, and retention. The limited number of interventions in the PrEP continuum of care indicates a need for the uptake of dissemination and implementation science (D&I) frameworks. D&I could help facilitate the translation of evidence-based practices, interventions, and policies to address the HIV crisis in Latin America.

The Pre-exposure Prophylaxis (PrEP) Care Continuum Among English-Speaking Latino Sexual Minority Men in the United States (2014-2020).

There is limited understanding of the pre-exposure prophylaxis (PrEP) care continuum specific to Latino/x gay, bisexual, and other sexual minority men (SMM) that encompasses the population residing outside of large metropolitan or urban areas. We examined trends and characteristics associated with the PrEP care continuum with data from the 2014-2020 cycles of the American Men's Internet Survey, an annual online cross-sectional behavioral survey of cisgender SMM in the United States. We calculated PrEP continuum outcomes overall and by year among Hispanic/Latino SMM (n = 9010). We used generalized estimating equations with Poisson links to examine (1) temporal trends (2014-2020) in each step of the PrEP continuum and PrEP use in the past year stratified by PrEP eligibility and (2) correlates of each step of the PrEP continuum in 2020 using multivariable models. Among 2283 Latino SMM in 2020, 84% reported PrEP awareness, 30% discussed PrEP with a provider, 15% used PrEP in the past year, and 12% were currently using PrEP. PrEP awareness increased from 52% in 2014 to 84% in 2020; and PrEP use in the past year increased from 4% in 2014 to 15% in 2020. In the multivariable models, age and PrEP eligibility were associated with PrEP use in the past year, and urban-rural classification was associated with current PrEP use. While most of the Latino SMM are aware of PrEP, significant gaps remain in this population in discussing PrEP with a provider and using PrEP that require tailored strategies to enhance access to HIV prevention services.

A Novel Capacity-Strengthening Intervention for Frontline Harm Reduction Workers to Support Pre-exposure Prophylaxis Awareness-Building and Promotion Among People Who Use Drugs: Formative Research and Intervention Development.

HIV prevalence among people who use drugs (PWUD) in Baltimore, Maryland, is higher than among the general population. Pre-exposure prophylaxis (PrEP) is a widely available medication that prevents HIV transmission, yet its usefulness is low among PWUD in Baltimore City and the United States. Community-level interventions to promote PrEP uptake and adherence among PWUD are limited. We describe the development of a capacity-strengthening intervention designed for frontline harm reduction workers (FHRWs) to support PrEP awareness-building and promotion among PWUD. Our study was implemented in 2 phases in Baltimore City, Maryland. The formative phase focused on a qualitative exploration of the PrEP implementation environment, as well as facilitators and barriers to PrEP willingness and uptake, among cisgender women who use drugs. This work, as well as the existing literature, theory, and feedback from our community partners, informed the intervention development phase, which used an academic-community partnership model. The intervention involved a 1-time, 2-hour training with FHRWs aimed at increasing general PrEP knowledge and developing self-efficacy promoting PrEP in practice (eg, facilitating PrEP dialogues with clients, supporting client advancement along a model of PrEP readiness, and referring clients to PrEP services). In a separate paper, we describe the conduct and results of a mixed methods evaluation to assess changes in PrEP-related knowledge, attitudes, self-efficacy, and promotion practices among FHRWs participating in the training. The pilot was developed from October to December 2021 and implemented from December 2021 through April 2022. We leveraged existing relationships with community-based harm reduction organizations to recruit FHRWs into the intervention. A total of 39 FHRWs from 4 community-based organizations participated in the training across 4 sessions (1 in-person, 2 online synchronous, and 1 online asynchronous). FHRW training attendees represented a diverse range of work cadres, including peer workers, case managers, and organizational administrators. This intervention could prevent the HIV burden among PWUD by leveraging the relationships that FHRWs have with PWUD and by supporting advancement along the PrEP continuum. Given suboptimal PrEP uptake among PWUD and the limited number of interventions designed to address this gap, our intervention offers an innovative approach to a burgeoning public health problem. If effective, our intervention has the potential to be further developed and scaled up to increase PrEP awareness and uptake among PWUD worldwide.

Percepção e experiências da PrEP de homens gays e bissexuais jovens e adolescentes: uma análise interseccional

Studies indicate gaps in knowledge about the barriers to access and adhere to HIV pre-exposure prophylaxis (PrEP) in adolescents. In this article, we explore the perceptions and experiences of young gay, bisexual, and other men who have sex with men (YGBMSM) of the search, use and adherence to PrEP, considering their positions according to social markers of difference such as race/skin color, gender, sexuality, and social status. Intersectionality provides theoretical and methodological tools to interpret how the interlinking of these social markers of difference constitutes barriers and facilitators in the PrEP care continuum. The analyzed material is part of the PrEP1519 study and is comprised of 35 semi-structured interviews with YGBMSM from two Brazilian capitals (Salvador and São Paulo). The analyses suggest connections between social markers of difference, sexual cultures, and the social meanings of PrEP. Subjective, relational and symbolic aspects permeate the awareness of PrEP in the range of prevention tools. Willingness to use and adhere to PrEP is part of a learning process, production of meaning, and negotiation in the face of getting HIV and other sexually transmittable infections and the possibilities of pleasure. Thus, accessing and using PrEP makes several adolescents more informed about their vulnerabilities, leading to more informed decision-making. Interlinking the PrEP continuum of care among YGBMSM with the intersections of the social markers of difference may provide a conceptual framework to problematize the conditions and effects of implementing this prevention strategy, which could bring advantages to HIV prevention programs.

The HIV pre-exposure prophylaxis continuum of care among women who inject drugs: A systematic review

IntroductionPeople who inject drugs have a substantial risk for HIV infection, especially women who inject drugs (WWID). HIV pre-exposure prophylaxis (PrEP), a highly-effective HIV prevention drug, is uncommonly studied among WWID, and we aimed to synthesize existing knowledge across the full PrEP continuum of care in this population.MethodsWe systematically searched for peer-reviewed literature in three electronic databases, conference abstracts from three major HIV conferences, and gray literature from relevant sources.Eligibility criteria included quantitative, qualitative or mixed-methods studies with primary data collection reporting a PrEP-related finding among WWID, and published in English or Spanish between 2012 and 2021. The initial search identified 2,809 citations, and 32 were included. Data on study characteristics and PrEP continuum of care were extracted, then data were analyzed in a narrative review.ResultsOur search identified 2,809 studies; 32 met eligibility requirements. Overall, awareness, knowledge, and use of PrEP was low among WWID, although acceptability was high. Homelessness, sexual violence, unpredictability of drug use, and access to the healthcare system challenged PrEP usage and adherence. WWID were willing to share information on PrEP with other WWID, especially those at high-risk of HIV, such as sex workers.ConclusionsTo improve PrEP usage and engagement in care among WWID, PrEP services could be integrated within gender-responsive harm reduction and drug treatment services. Peer-based interventions can be used to improve awareness and knowledge of PrEP within this population. Further studies are needed on transgender WWID as well as PrEP retention and adherence among all WWID.

Gaps in HIV Preexposure Prophylaxis Continuum of Care Following State Partner Services for Massachusetts Primary and Secondary Syphilis Cases, 2017 to 2018.

Human immunodeficiency virus (HIV) preexposure prophylaxis (PrEP) reduces HIV acquisition. We used a PrEP continuum of care to measure impact of field epidemiologist-facilitated referrals for PrEP-naive infectious syphilis cases across multiple clinical and pharmacy sites of care. Retrospective analysis of 2017 to 2018 primary and secondary syphilis cases, medical charts, and pharmacy data to identify PrEP education, referral offer, referral acceptance, first visit, prescription pickup (PrEP initiation) and 2 to 3 months (PrEP persistence). The HIV seroconversion was determined using database match at syphilis diagnosis date and at 12 months. χ 2 or Fisher's exact tests were used to compare demographic characteristics associated with steps with lower progression rates. Of 1077 syphilis cases, partner services engaged 662 of 787 (84%) HIV-negative cases; 490 were PrEP-naive, 266 received education, 166 were offered referral, 67 accepted referral, 30 attended an initial appointment, and 22 were prescribed PrEP. Of 16 with pharmacy data, 14 obtained medication, and 8 persisted on PrEP at 2 to 3 months. Continuum progression was lowest from (1) PrEP-naïve to receiving PrEP education, (2) offered referral to referral acceptance, and (3) referral acceptance to initial PrEP appointment. Men with male partners were more likely to receive PrEP education or accept a referral. Higher social vulnerability was associated with increased PrEP referral acceptance. Few individuals accepted PrEP referrals and persisted on PrEP. Field and clinic data capture were inconsistent, possibly underestimating referral volume and impact of field engagement. Efforts aimed at increasing referral acceptance and clinic attendance may improve PrEP uptake especially among women and heterosexual men with syphilis.

Cost-Effectiveness of Interventions to Improve HIV Pre-exposure Prophylaxis Initiation, Adherence, and Persistence Among Men Who Have Sex With Men.

To help achieve Ending the HIV Epidemic (EHE) goals of reducing new HIV incidence, pre-exposure prophylaxis (PrEP) use and engagement must increase despite multidimensional barriers to scale-up and limitations in funding. We investigated the cost-effectiveness of interventions spanning the PrEP continuum of care. Men who have sex with men in Atlanta, GA, a focal jurisdiction for the EHE plan. Using a network-based HIV transmission model, we simulated lifetime costs, quality-adjusted life years (QALYs), and infections averted for 8 intervention strategies using a health sector perspective. Strategies included a status quo (no interventions), 3 distinct interventions (targeting PrEP initiation, adherence, or persistence), and all possible intervention combinations. Cost-effectiveness was evaluated incrementally using a $100,000/QALY gained threshold. We performed sensitivity analyses on PrEP costs, intervention costs, and intervention coverage. Strategies averted 0.2%-4.2% new infections and gained 0.0045%-0.24% QALYs compared with the status quo. Initiation strategies achieved 20%-23% PrEP coverage (up from 15% with no interventions) and moderate clinical benefits at a high cost, while adherence strategies were relatively low cost and low benefit. Under our assumptions, the adherence and initiation combination strategy was cost-effective ($86,927/QALY gained). Sensitivity analyses showed no strategies were cost-effective when intervention costs increased by 60% and the strategy combining all 3 interventions was cost-effective when PrEP costs decreased to $1000/month. PrEP initiation interventions achieved moderate public health gains and could be cost-effective. However, substantial financial resources would be needed to improve the PrEP care continuum toward meeting EHE goals.

Race and Sexual Identity Differences in PrEP Continuum Outcomes Among Latino Men in a Large Chicago Area Healthcare Network.

U.S. HIV incidence is threefold higher among Latino individuals than non-Latino Whites. Pre-exposure prophylaxis (PrEP) uptake remains low among Latino men. Most HIV studies view Latino communities as a monolithic group, ignoring racial and sexual diversity. This analysis examines PrEP-related outcomes including eligibility, first prescription, and second prescription across race and sexual identity in a sample of Latino cisgender men (n = 8271) who sought services from a healthcare network in Chicago in 2012–2019. Logistic regression was used to calculate adjusted odds ratios. Latino-only participants had lower odds of PrEP eligibility and first prescription compared to White-Latino participants. No other significant differences by race were detected. While bisexual participants had equivalent odds of PrEP eligibility, they had lower odds of first PrEP prescription compared to gay participants. Heterosexual participants also had lower odds of PrEP eligibility and initiation. Future research should address unique factors shaping PrEP-related outcomes among diverse Latino populations.

859. Suboptimal Uptake, Retention, and Adherence of Daily Oral PrEP Among People with OUD Receiving HCV Treatment

BackgroundDaily oral pre-exposure prophylaxis (PrEP) with tenofovir/emtricitabine (TDF/FTC) effectively prevents HIV among people who use drugs (PWUD). Despite rising rates of HIV incidence and injection drug use, PrEP use remains low and limited research exists on PrEP adherence and retention in this population.MethodsBased in Washington, DC and Baltimore, the ANCHOR investigation evaluated a community-based model of care collocating hepatitis C (HCV) therapy, medication for opioid use disorder (OUD), and PrEP in people with chronic HCV, OUD, and drug use within 1 year. PrEP counseling was offered from HCV treatment Day 0 until Week 24 and subjects could start any time during this window. PrEP patients were followed for 48 weeks and assessed for adherence by self-report and dried blood spot analysis of TDF. ANCHOR PrEP study enrollment and participant retention along the PrEP continuum.Results198 participants enrolled in ANCHOR, of whom 185 (93%) were HIV-negative. 29 subjects (16% of HIV-negative group) initiated PrEP. 116 subjects (63%) met 2014 CDC criteria for PrEP initiation due to IDU (82, 44%), sex (9, 5%), or both (25, 14%). Those who initiated were more likely to meet both CDC sexual and IDU risk criteria than those who declined PrEP (P=0.006). Providers recommended PrEP to 94 subjects (51%), which was associated with uptake (P=0.02). While median treatment duration was 104 days (IQR 28, 276), only 8 subjects were retained through Week 48. The most common reason for discontinuation was side effects in 7 subjects or 24% of PrEP subgroup. Treatment interruptions occurred in one-third of the PrEP subgroup. Adherence of 4 to 7 pills per week was variable over time by self-report and declined by TDF analysis. No HIV seroconversions occurred. Demographic and epidemiological background of the ANCHOR study population. Total duration, in days, on PrEP in the ANCHOR study. Discontinued participants are grouped by reason for cessation of therapy.PrEP Adherence Adherence to PrEP by ANCHOR study timepoint, assessed via self-report (above) and dried bloodspot analysis of tenofovir level (below).ConclusionIn this cohort of people with OUD and HCV, 16% of subjects started PrEP. While clinical recommendation was associated with uptake, high rates of disruption and discontinuation, compounded by variable pill adherence, made daily oral TDF/FTC a suboptimal preventive strategy in this cohort. Emerging PrEP modalities like long-acting injectables have potential to address these barriers, but PWUD have been excluded from their research and development to date. Additional work to identify vulnerable individuals and to promote use, adherence, and retention will be critical in implementing PrEP more effectively in this key population.Disclosures Sarah Kattakuzhy, MD, Gilead Sciences (Scientific Research Study Investigator, Research Grant or Support) Elana S. Rosenthal, MD, Gilead Sciences (Research Grant or Support)Merck (Research Grant or Support)

Toward Greater Pre-exposure Prophylaxis Equity: Increasing Provision and Uptake for Black and Hispanic/Latino Individuals in the U.S.

Pre-exposure prophylaxis (PrEP) is highly effective at preventing HIV acquisition and is a critical tool in the Ending the HIV Epidemic in the U.S. initiative. However, major racial and ethnic disparities across the pre-exposure prophylaxis continuum, secondary to structural inequities and systemic racism, threaten progress. Many barriers, operating at the individual, network, healthcare, and structural levels, impede PrEP access and uptake within Black and Hispanic/Latino communities. This review provides an overview of those barriers and the innovative and collaborative solutions that health departments, healthcare organizations, and community partners have implemented to increase PrEP provision and uptake among disproportionately affected communities. Promising strategies at the individual and network levels focus on increasing patient support throughout the PrEP continuum, positioning and training community members to expand knowledge of and interest in PrEP, and leveraging mobile technologies to support PrEP uptake. Healthcare-level solutions include expanding the venues and types of healthcare professionals that can provide PrEP, and structural- and policy-level options focus on financial assistance programs and health insurance expansion. Key research gaps include demonstrating that pilot studies and interventions remain effective at scale and across varied contexts. Although the last 2 decades have provided effective tools to end the HIV epidemic, realizing this vision for the U.S. will require addressing persistent and pervasive HIV-related disparities in Black and Hispanic/Latino communities. Federal, state, and local partners should expand efforts to address longstanding health and structural inequities and partner with disproportionately affected communities to rapidly expand PrEP scale-up.

PrEP Care Continuum Engagement Among Persons Who Inject Drugs: Rural and Urban Differences in Stigma and Social Infrastructure

Pre-exposure prophylaxis (PrEP) is a medication that prevents HIV acquisition, yet PrEP uptake has been low among people who inject drugs. Stigma has been identified as a fundamental driver of population health and may be a significant barrier to PrEP care engagement among PWID. However, there has been limited research on how stigma operates in rural and urban settings in relation to PrEP. Using in-depth semi-structured qualitative interviews (n = 57) we explore PrEP continuum engagement among people actively injecting drugs in rural and urban settings. Urban participants had more awareness and knowledge. Willingness to use PrEP was similar in both settings. However, no participant was currently using PrEP. Stigmas against drug use, HIV, and sexualities were identified as barriers to PrEP uptake, particularly in the rural setting. Syringe service programs in the urban setting were highlighted as a welcoming space where PWID could socialize and therefore mitigate stigma and foster information sharing.

Characterizing the PrEP Continuum for Black and Latinx Sexual and Gender Minority Youth.

Pre-exposure prophylaxis (PrEP) rollout efforts thus far have inadequately reached young people from underrepresented backgrounds. This study explores PrEP engagement among young Black and Latinx men who have sex with men, transgender women, and gender diverse individuals in three U.S. cities using an adapted PrEP continuum measure. We analyze data from the recruitment phase of an ongoing PrEP engagement intervention (n = 319) using partial proportional odds logistic regression. Participants reported high willingness and intention to use PrEP, yet most (82%) were not currently taking PrEP. Being insured (aOR = 2.95, 95%-CI = 1.60-5.49), having one or more PrEP users in one's sexual network (aOR = 4.19, 95%-CI = 2.61-6.79), and higher individual HIV risk scores (aOR = 1.62, 95%-CI = 1.34-1.97) were each associated with being further along the PrEP continuum. Strategies are needed to address barriers to healthcare access and leverage connections within social and sexual networks in order to bolster PrEP engagement among marginalized young people from diverse backgrounds.

PrEP navigation continuum among men who have sex with men, trans women, and people with alternative gender identities in three California counties

Strategies to reduce new HIV infections include pre-exposure prophylaxis (PrEP). Of the estimated over 221,000 Californians with an indication for PrEP, only 31,280 (14 %) were currently taking the medication as of 2019. Centers for Disease Control and Prevention Project PrIDE funds were used to support and develop California PrEP navigation programs designed to increase PrEP uptake among trans persons and men who have sex with men (MSM). An analysis of PrIDE-funded PrEP navigation service outcomes was conducted to highlight where continuum drop-off occurred and how it varied among priority populations. Quantitative service delivery data for PrEP navigation program activities conducted from October 1, 2015 to September 30, 2018 were collected across three county-level local health jurisdictions (LHJs) via standardized, agency-completed service delivery data collection tools. Analyses included frequencies and crosstabs. These variations were not tested statistically but highlight group-specific needs to be addressed before implementing PrEP navigation within California. Continued systematic collection and analyses of PrEP continuum outcomes will allow programs to dynamically identify and address barriers to PrEP uptake in priority populations.

Characterization of HIV Preexposure Prophylaxis Use Behaviors and HIV Incidence Among US Adults in an Integrated Health Care System

Long-term follow-up is needed to evaluate gaps in HIV preexposure prophylaxis (PrEP) care delivery and to identify individuals at risk for falling out of care. To characterize the PrEP continuum of care, including prescription, initiation, discontinuation, and reinitiation, and evaluate incident HIV infections. This retrospective cohort study used data from the electronic health records (EHR) at Kaiser Permanente Northern California to identify individuals aged 18 years and older who received PrEP care between July 2012 and March 2019. Individuals were followed up from date of linkage (defined as a PrEP referral or PrEP-coded encounter) until March 2019, HIV diagnosis, discontinuation of health plan membership, or death. Data were analyzed from December 2019 to January 2021. Sociodemographic factors included age, sex, race and ethnicity, and neighborhood deprivation index, and clinical characteristics were extracted from the EHR. The primary outcomes were attrition at each step of the PrEP continuum of care and incident HIV infections. Among 13 906 individuals linked to PrEP care, the median (interquartile range [IQR]) age was 33 (27-43) years, 6771 individuals (48.7%) were White, and 13 227 (95.1%) were men. Total follow-up was 26 210 person-years (median [IQR], 1.6 [0.7-2.8] years). Of individuals linked to PrEP care, 88.1% (95% CI, 86.1%-89.9%) were prescribed PrEP and of these, 98.2% (95% CI, 97.2%-98.8%) initiated PrEP. After PrEP initiation, 52.2% (95% CI, 48.9%-55.7%) discontinued PrEP at least once during the study period, and 60.2% (95% CI, 52.2%-68.3%) of these individuals subsequently reinitiated. Compared with individuals aged 18 to 25 years, older individuals were more likely to receive a PrEP prescription (eg, age >45 years: hazard ratio [HR], 1.21 [95% CI, 1.14-1.29]) and initiate PrEP (eg, age >45 years: HR, 1.09 [95% CI, 1.02-1.16]) and less likely to discontinue (eg, age >45 years: HR, 0.46 [95% CI, 0.42-0.52]). Compared with White patients, African American and Latinx individuals were less likely to receive a PrEP prescription (African American: HR, 0.74 [95% CI, 0.69-0.81]; Latinx: HR, 0.88 [95% CI, 0.84-0.93]) and initiate PrEP (African American: HR, 0.87 [95% CI, 0.80-0.95]; Latinx: HR, 0.90 [95% CI, 0.86-0.95]) and more likely to discontinue (African American: HR, 1.36 [95% CI, 1.17-1.57]; Latinx: 1.33 [95% CI, 1.22-1.46]). Similarly, women, individuals with lower neighborhood-level socioeconomic status (SES), and persons with a substance use disorder (SUD) were less likely to be prescribed (women: HR, 0.56 [95% CI, 0.50-0.62]; lowest SES: HR, 0.72 [95% CI, 0.68-0.76]; SUD: HR, 0.88 [95% CI, 0.82-0.94]) and initiate PrEP (women: HR, 0.71 [95% CI, 0.64-0.80]; lower SES: HR, 0.93 [95% CI, 0.87-.0.99]; SUD: HR, 0.88 [95% CI, 0.81-0.95]) and more likely to discontinue (women: HR, 1.99 [95% CI, 1.67-2.38]); lower SES: HR, 1.40 [95% CI, 1.26-1.57]; SUD: HR, 1.23 [95% CI, 1.09-1.39]). HIV incidence was highest among individuals who discontinued PrEP and did not reinitiate PrEP (1.28 [95% CI, 0.93-1.76] infections per 100 person-years). These findings suggest that gaps in the PrEP care continuum were concentrated in populations disproportionately impacted by HIV, including African American individuals, Latinx individuals, young adults (aged 18-25 years), and individuals with SUD. Comprehensive strategies to improve PrEP continuum outcomes are needed to maximize PrEP impact and equity.

Assessment of PrEP Awareness, PrEP Discussion with a Provider, and PrEP Use by Transmission Risk Group with an Emphasis on the Southern United States.

The number of new HIV diagnoses is highest in the South. Many persons who might benefit from pre-exposure prophylaxis (PrEP) are not engaged in the HIV PrEP continuum of care. We analyzed National HIV Behavioral Surveillance data to assess engagement in the PrEP continuum of care among persons with increased HIV risk. We compared PrEP awareness, discussion with a clinical provider, and use among persons living in the South to those living elsewhere in the United States. PrEP awareness was lowest among heterosexual persons (7%), highest among men who have sex with men (85%), and 26% among persons who inject drugs. PrEP use was low among each population (≤35% for all cycles). There was limited evidence of differences in PrEP use between persons in southern and non-southern U.S. Efforts are needed to increase use of PrEP among each of the groups with increased HIV risk.