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Sexual behaviour of heterosexual men and women receiving antiretroviral pre-exposure prophylaxis for HIV prevention: a longitudinal analysis.

ABSTRACT: Scarce data are available to assess sexual behaviour of individuals using antiretroviral pre-exposure prophylaxis for HIV prevention. Increased sexual risk taking by individuals using effective HIV prevention strategies, like pre-exposure prophylaxis, could offset the benefits of HIV prevention. We studied whether the use of pre-exposure prophylaxis in HIV-uninfected men and women in HIV-serodiscordant couples was associated with increased sexual risk behaviour.We undertook a longitudinal analysis of data from the Partners PrEP Study, a double-blind, randomised, placebo-controlled trial of daily oral pre-exposure prophylaxis among HIV-uninfected partners of heterosexual HIV-serodiscordant couples (n=3163, ?18 years of age). Efficacy for HIV prevention was publicly reported in July 2011, and participants continued monthly follow-up thereafter. We used regression analyses to compare the frequency of sex-unprotected by a condom-during the 12 months after compared with the 12 months before July 2011, to assess whether knowledge of pre-exposure prophylaxis efficacy for HIV prevention caused increased sexual risk behaviour.We analysed 56?132 person-months from 3024 HIV-uninfected individuals (64% male). The average frequency of unprotected sex with the HIV-infected study partner was 59 per 100 person-months before unmasking versus 53 after unmasking; we recorded no immediate change (p=0·66) or change over time (p=0·25) after July, 2011. We identified a significant increase in unprotected sex with outside partners after July, 2011, but the effect was small (average of 6·8 unprotected sex acts per year vs 6·2 acts in a predicted counterfactual scenario had patients remained masked, p=0·04). Compared with before July, 2011, we noted no significant increase in incident sexually transmitted infections or pregnancy after July, 2011.Pre-exposure prophylaxis, provided as part of a comprehensive prevention package, might not result in substantial changes in risk-taking sexual behaviour by heterosexual couples.The Bill & Melinda Gates Foundation and the US National Institute of Mental Health.

SUBMITTER: Mugwanya KK

PROVIDER: S-EPMC3920826 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature

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Sexual behaviour of heterosexual men and women receiving antiretroviral pre-exposure prophylaxis for HIV prevention: a longitudinal analysis.

Mugwanya Kenneth K KK Donnell Deborah D Celum Connie C Thomas Katherine K KK Ndase Patrick P Mugo Nelly N Katabira Elly E Ngure Kenneth K Baeten Jared M JM

The Lancet. Infectious diseases 20131017 12

<h4>Background</h4>Scarce data are available to assess sexual behaviour of individuals using antiretroviral pre-exposure prophylaxis for HIV prevention. Increased sexual risk taking by individuals using effective HIV prevention strategies, like pre-exposure prophylaxis, could offset the benefits of HIV prevention. We studied whether the use of pre-exposure prophylaxis in HIV-uninfected men and women in HIV-serodiscordant couples was associated with increased sexual risk behaviour.<h4>Methods</h4 ...[more]

PMID: 24139639

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Project description:BackgroundAntiretroviral preexposure prophylaxis is a promising approach for preventing human immunodeficiency virus type 1 (HIV-1) infection in heterosexual populations.MethodsWe conducted a randomized trial of oral antiretroviral therapy for use as preexposure prophylaxis among HIV-1-serodiscordant heterosexual couples from Kenya and Uganda. The HIV-1-seronegative partner in each couple was randomly assigned to one of three study regimens--once-daily tenofovir (TDF), combination tenofovir-emtricitabine (TDF-FTC), or matching placebo--and followed monthly for up to 36 months. At enrollment, the HIV-1-seropositive partners were not eligible for antiretroviral therapy, according to national guidelines. All couples received standard HIV-1 treatment and prevention services.ResultsWe enrolled 4758 couples, of whom 4747 were followed: 1584 randomly assigned to TDF, 1579 to TDF-FTC, and 1584 to placebo. For 62% of the couples followed, the HIV-1-seronegative partner was male. Among HIV-1-seropositive participants, the median CD4 count was 495 cells per cubic millimeter (interquartile range, 375 to 662). A total of 82 HIV-1 infections occurred in seronegative participants during the study, 17 in the TDF group (incidence, 0.65 per 100 person-years), 13 in the TDF-FTC group (incidence, 0.50 per 100 person-years), and 52 in the placebo group (incidence, 1.99 per 100 person-years), indicating a relative reduction of 67% in the incidence of HIV-1 with TDF (95% confidence interval [CI], 44 to 81; P<0.001) and of 75% with TDF-FTC (95% CI, 55 to 87; P<0.001). Protective effects of TDF-FTC and TDF alone against HIV-1 were not significantly different (P=0.23), and both study medications significantly reduced the HIV-1 incidence among both men and women. The rate of serious adverse events was similar across the study groups. Eight participants receiving active treatment were found to have been infected with HIV-1 at baseline, and among these eight, antiretroviral resistance developed in two during the study.ConclusionsOral TDF and TDF-FTC both protect against HIV-1 infection in heterosexual men and women. (Funded by the Bill and Melinda Gates Foundation; Partners PrEP ClinicalTrials.gov number, NCT00557245.).

Project description:ObjectiveLifestyle may be associated with risk behaviours. This study compares gym exercise and sexual risk behaviour between men who have sex with men (MSM) and heterosexual men. The research was based on the assumption that men who become muscular and physically attractive increase their number of sex partners and consequently their risk of HIV or other sexually transmitted infections (STIs).SettingFive gyms in central Tel Aviv, Israel.ParticipantsIn 2012, a sample of 182 (48%) MSM and 197 (52%) heterosexual men who train in gyms completed anonymous questionnaires regarding their training, health and sexual behaviours.OutcomesParticipants in this cross-sectional study who exercised more than the median number of anaerobic training hours were defined as performing intensive anaerobic training (IAT), and those who had performed more than one act of unprotected anal/vaginal intercourse in the preceding 6 months with a partner whose HIV status was unknown were defined as high risk.ResultsMSM showed a stronger desire to become muscular than heterosexual men, were more likely to perform IAT, and used protein powders or anabolic steroids. They reported that improving their body shape and increasing their self-confidence were their main reasons for training, whereas heterosexual men indicated weight loss and health improvement as the main reasons for training. MSM engaged in riskier sexual behaviour than heterosexual men. Of all the high-risk men, 61.9% (N=70) performed IAT, while 38.1% (N=43) performed moderate anaerobic training (p<0.01). The association between IAT and sexual risk was stronger in MSM than in heterosexual men (p<0.01 vs p=0.05, respectively). The interaction between MSM and IAT in high-risk participants was multiplicative.ConclusionsMSM practised more IAT than heterosexual men, and their interaction between IAT and sexual risk was multiplicative. The MSM community could benefit from a holistic approach to sexual health and its association with body image and IAT. The gym MSM culture demonstrates how internal dynamics and social norms are possible factors driving MSM to high-risk behaviour for HIV/STI.Study registrationThe study was approved by the Wolfson Hospital Review Board, Holon, Israel (WOMC-0058-09).

Project description:Black sexual minority men (BSMM) are a priority population for HIV prevention efforts, including pre-exposure prophylaxis (PrEP) promotion. Intersectional stigma can be associated with deterrence from PrEP utilization among BSMM; this stigma has a novel context in the COVID-19 pandemic. To examine this, we investigated latent profiles of racial, sexuality-based, and related stigmas among HIV-negative BSMM in the COVID-19 pandemic and tested their association with PrEP use. We analyzed cross-sectional data from a pilot sample of HIV-negative BSMM (n = 151) collected between July 2nd and September 3rd, 2020 in the United States, primarily located on the east coast. We conducted latent profile analysis using internalized racism and homophobia, anticipated racism and homophobia, HIV stigma, healthcare stigma, and PrEP stigma. We then tested associations between latent profiles and both PrEP use (binary) and PrEP acceptability (ordinal) using modified Poisson regression and cumulative log models, respectively. We identified three latent profiles, characterized as ‘Low Internalized Stigma, High Anticipated Stigma’ (reference profile), ‘High Internalized Stigma, Low Anticipated Stigma,’ and ‘High Internalized and Anticipated Stigma.’ The ‘High Internalized and Anticipated Stigma’ profile was associated with PrEP use (aPR 0.37, 95% CI 0.17, 0.82) and acceptability (aPR 0.32, 95% CI 0.18, 0.57) nearly three times as low as the comparing profile after adjustment for confounders. The ‘High Internalized Stigma, Low Anticipated Stigma’ was also associated with PrEP acceptability nearly three times as low as the reference (aPR 0.38, 95% CI 0.22, 0.68). We identified latent profiles characterized by internalized and anticipated stigmas among BSMM during the COVID-19 pandemic and found that the profile with the highest levels of both internalized and anticipated stigma was associated with the lowest PrEP use and acceptability. Internalized stigma may be a particularly relevant intervention target in efforts to promote PrEP uptake among BSMM. Supplementary Information The online version contains supplementary material available at 10.1007/s43545-022-00490-w.

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Sexual behaviour of heterosexual men and women receiving antiretroviral pre-exposure prophylaxis for HIV prevention: a longitudinal analysis.

Publications

Sexual behaviour of heterosexual men and women receiving antiretroviral pre-exposure prophylaxis for HIV prevention: a longitudinal analysis.

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