Primary Outcome |
Key endpoints will include: a) HIV-1 infected persons whose partner completes HIV-1 testing, b) PrEP initiation and sustained use by HIV-1 uninfected partners through ART initiation and adherence by their infected partner, c) ART initiation and sustained use by HIV-
1 infected persons, d) HIV-1 uninfected partners staying HIV-1 uninfected, and e) couples achieving optimized HIV-1 prevention coverage (defined as PrEP with high adherence, ART
with viral suppression, or overlap of the two during the bridge period plus no HIV-1 transmission). We will characterize couples’ risk profiles using our validated risk score [21],
which we can use to further predict HIV-1 incidence in the absence of intervention. Finally, in our prior work, retention in prevention services is a strong measure of acceptability and predictor of HIV-1 protection, as loss to follow-up eliminates access to PrEP/ART; we will
measure retention in care, as this is also a feasible measure for public health delivery. Finally, our data [44] do not support sexual risk taking in couples but we will analyze for risk
compensation and finalize messaging as part of our counseling materials.
We will conduct quantitative and qualitative work to assess barriers and facilitators to use of PrEP as a bridge to ART in couples. Adherence to ART and PrEP will be measured through pharmacy refill (i.e., picking up each new supply, which is a feasible measure for an implementation setting), self-report (e.g., frequency, ability, and self-rating, missed doses) [54, 67, 68], and biologic measures (plasma HIV-1 RNA in those on ART and plasma tenofovir in those on PrEP [a random subset plus seroconverters]). Our goal is to understand both execution (i.e., adherence while used) and persistence (i.e., duration of use). We will use multivariable proportional hazards models to assess correlates of time to initiation and generalized estimating equations to assess adherence correlates.
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HIV Seroconversion, PrEP Refills, Adherence |
Secondary Outcome |
Key endpoints will include: a) HIV-1 infected persons whose partner completes HIV-1 testing, b) PrEP initiation and sustained use by HIV-1 uninfected partners through ART initiation and adherence by their infected partner, c) ART initiation and sustained use by HIV-
1 infected persons, d) HIV-1 uninfected partners staying HIV-1 uninfected, and e) couples achieving optimized HIV-1 prevention coverage (defined as PrEP with high adherence, ART
with viral suppression, or overlap of the two during the bridge period plus no HIV-1 transmission). We will characterize couples’ risk profiles using our validated risk score [21],
which we can use to further predict HIV-1 incidence in the absence of intervention. Finally, in our prior work, retention in prevention services is a strong measure of acceptability and predictor of HIV-1 protection, as loss to follow-up eliminates access to PrEP/ART; we will
measure retention in care, as this is also a feasible measure for public health delivery. Finally, our data [44] do not support sexual risk taking in couples but we will analyze for risk
compensation and finalize messaging as part of our counseling materials.
We will conduct quantitative and qualitative work to assess barriers and facilitators to use of PrEP as a bridge to ART in couples. Adherence to ART and PrEP will be measured through pharmacy refill (i.e., picking up each new supply, which is a feasible measure for an implementation setting), self-report (e.g., frequency, ability, and self-rating, missed doses) [54, 67, 68], and biologic measures (plasma HIV-1 RNA in those on ART and plasma tenofovir in those on PrEP [a random subset plus seroconverters]). Our goal is to understand both execution (i.e., adherence while used) and persistence (i.e., duration of use). We will use multivariable proportional hazards models to assess correlates of time to initiation and generalized estimating equations to assess adherence correlates.
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PrEP Refill |