Bridging the knowledge gap of biomedical HIV prevention tools among sub-saharan african immigrants in France. Results from an empowerment-based intervention.

Introduction: Biomedical HIV prevention tools are available in France to prevent new infections. However, evidence suggests a lack of knowledge of these tools among sub-Saharan African immigrants, who are particularly affected by HIV due to social hardship, an indirect factor of HIV acquisition. We analysed the impact of an empowerment-based intervention on the knowledge of treatment as prevention (TasP), pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP) in a population of precarious sub-Saharan African immigrants. Methods: Data were collected throughout the MAKASI project. Following an outreach approach, participants were recruited in public places based on their precarious situations and followed for six months (0, 3, 6 months) between 2018 and 2021. Participants were randomized into two groups and received an empowerment intervention sequentially (stepped wedge design). We used random-effects logistic regression models to evaluate the intervention effect on the knowledge of biomedical HIV prevention tools. ClinicalTrials.gov Identifier: NCT04468724. Results: The majority of the participants were men (77.5%), and almost half of them had arrived in France within 2 years prior to inclusion (49.3%). At baseline, 56% of participants knew about TasP, 6% knew about PEP and 4% knew about PrEP. Receiving the intervention increased the odds of knowing about PEP (aOR = 2.02 [1.09-3.75]; p < 0.026). Intervention effects were observed for TasP and PrEP only after 6 months. We found significant time effects for PEP (at 3 months, aOR = 4.26 [2.33-7.80]; p < 0.001; at 6 months, aOR = 18.28 [7.39-45.24]; p < 0.001) and PrEP (at 3 months, aOR = 4.02 [2.10-7.72]; p < 0.001; at 6 months, aOR = 28.33 [11.16-71.91]; p < 0.001). Conclusions: We showed that the intervention increased the knowledge of biomedical HIV prevention tools. The effect of the intervention was coupled with an important time effect. This suggested that exposure to the intervention together with other sources of information contributed to increased knowledge of biomedical HIV prevention tools among precarious sub-Saharan African immigrants.

Low knowledge of antiretroviral treatments for the prevention of HIV among precarious immigrants from sub-Saharan Africa living in the greater Paris area: Results from the Makasi project.

INTRODUCTION: In France, combination prevention tools, particularly antiretroviral treatment for HIV prevention has been available for several years. We described the knowledge of these antiretroviral treatments among immigrants from sub-Saharan Africa, who are particularly affected by HIV, and the factors associated with this knowledge. METHODS: The data come from the Makasi study, which was conducted between 2019 and 2020 among precarious immigrants from sub-Saharan Africa recruited through a community-based outreach approach in the greater Paris area (n = 601). We described levels of knowledge of HIV treatment effectiveness (HTE), treatment as prevention (TasP), post-exposure prophylaxis (PEP), and pre-exposure prophylaxis (PrEP), by sex with chi2 test. We investigated factors associated with their knowledge with logistic regressions adjusted for sociodemographic characteristics, living conditions and sexual behaviors (p≤0.2). RESULTS: Respondents were mostly men (76%), from West Africa (61%), in precarious situation: 69% were unemployed, 74% were undocumented and 46% had no health coverage. Among this population, knowledge of HIV preventive treatments was heterogeneous. While HTE was well known (84%); TasP was known by only half of the respondents (46%), and PEP and PrEP were hardly known: 6% and 5%, respectively. Multivariate regressions models showed that these antiretroviral treatments for the prevention of HIV was better known by people with a higher level of education (PEP: aOR = 3.33 [1.09-10.20], p = 0.03; HTE: aOR = 4.33 [1.87-10.04], p<0.001), those who had a social network in France (TasP: aOR = 1.90, [1.33-2.73], p<0.001), those who had access to the health system and those who were exposed to sexual risks (TasP: aOR = 3.17, [1.03-9.69], p = 0.04; PrEP: aOR = 2.60 [0.72-9.34], p = 0.14). CONCLUSIONS: There is a need for specific communication on antiretroviral treatment for HIV prevention that targets sub-Saharan immigrants, particularly those who have no access to the health-care system and those who are less educated.

Finding the missing link: when community-based outreach in public space is key to engage migrants in health prevention programmes in Paris, France.

BACKGROUND: One of the classic challenges for prevention programmes is reaching the populations they serve. In France, a substantial number of African migrants living with HIV acquired their infection after migrating. The aim of this paper is to better understand the characteristics of the population reached by a community-based outreach approach. METHODS: We compared sociodemographic characteristics across three different groups in the Paris greater area: (1) the general African migrant population (Population census), (2) the African migrant population using either the regular healthcare system or the system for vulnerable populations (PARCOURS Survey) and (3) the African migrant population reached through a community-based mobile unit (Afrique Avenir). Comparisons were conducted according to sex, age, region of origin, duration of residence and occupational and legal statuses using χ2 tests. RESULTS: The migrants reached by the mobile unit were mostly men (69%), 52% of whom were younger than 35 years old. They more often lived in precarious situations than did the general sub-Saharan population (49% vs 35% were unemployed, respectively, p<0.001) and the ones accessing the regular healthcare system. Fewer of them lived in precarious situations than did migrants seeking healthcare consultations for vulnerable populations (42% in the mobile unit vs 54% in healthcare consultations were undocumented, p<0.028). CONCLUSION: Our study shows that the outreach approach can constitute a missing link in the prevention chain among sub-Saharan African migrants, reaching a group that differs from the general migrant population and from the migrant population in healthcare services-not only the newly arrived migrants who live in more precarious situations but also those who have been in France for several years and are still affected by social hardship.

Participatory development and pilot testing of the Makasi intervention: a community-based outreach intervention to improve sub-Saharan and Caribbean immigrants' empowerment in sexual health.

BACKGROUND: Sub-Saharan and Caribbean immigrants are particularly affected by HIV in Europe, and recent evidence shows that a large portion of them acquired HIV after arrival. There is a need for efficient interventions that can reduce immigrants' exposure to HIV. We describe the pilot phase of a community-based empowerment outreach intervention among sub-Saharan and Caribbean immigrants in the greater Paris area aimed at 1) constructing the intervention, 2) assessing its feasibility, and 3) assessing the feasibility of its evaluation based on a stepped-wedge approach. METHODS: 1) To develop the intervention, a literature review was conducted on existing interventions and participatory approaches developed, including the constitution of peer groups. 2) To assess the intervention's feasibility, a pilot was conducted between April 2018 and December 2018. A daily register was used to collect data on sociodemographic characteristics of all persons who visited the mobile team to assess eligibility and acceptability. 3) To assess the feasibility of performing a stepped-wedge trial to evaluate the intervention, we compared eligibility, enrolment and retention at 3 months in two arms (immediate vs deferred). Chi-squared tests were used to compare reach and retention between the two arms. RESULTS: Intervention development. The Makasi intervention was designed as an outreach intervention that starts with the persons' capacities and helps them appropriate existing resources and information and obtain knowledge about sexual health, based upon motivational interviewing techniques. Intervention Feasibility. Between April 2018 and December 2018, a total of 485 persons were identified as eligible. Participation in the intervention was proposed to 79% of eligible persons. When proposed, the persons enrolled in the intervention with a response rate of 69%. Some were lost to follow-up, and 188 persons were finally included. Evaluation Feasibility. The proportions of eligible (45 and 42%) individuals and of enrolled individuals (65 and 74%) were similar and not significantly different in the immediate and deferred arms, respectively. CONCLUSIONS: A community-based outreach intervention aimed at improving sub-Saharan and Caribbean immigrants' empowerment in sexual health is feasible. The pilot phase was key to identifying challenges, designing a relevant intervention and validating the stepped-wedge protocol for evaluation.