ArticlePloS one2025
The impact of Undetectable=Untransmittable and viral suppression on condomless sex among mixed HIV-status couples in Canada.
Article in PloS one, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
INTRODUCTION/
objectivesUndetectable = Untransmittable (U = U) means that virally suppressed HIV-positive partners cannot transmit HIV. With advancements in HIV care and the increasing number of mixed HIV-status relationships, we quantified U = U agreement (agreeing/disagreeing that U = U is true) among people in mixed HIV-status relationships, assessed response concordance between partners, quantified the association between dyad-level U = U agreement and condomless sex, and estimated interaction effects of viral suppression.
methodsA cross-sectional opportunistic and snowball sampled survey explored condom use, U = U agreement, viral suppression, sociodemographic/relationship characteristics, and sexual behavior among 306 participants (153 matched dyads) in mixed HIV-status relationships (2016-2018). Bivariate analyses identified sociodemographic/relationship characteristics associated with U = U agreement. Cohen's Kappa assessed response concordance between partners. Firth logistic regression estimated associations between dyad-level U = U agreement and condomless sex with effect modification by viral suppression.
resultsOf 293 responses to the U = U question, 53.2% agreed with U = U. Agreement was associated with younger age (p = 0.006) and shorter duration of HIV in relationships (p = 0.034). Concordance between partners was higher for factual questions (kappa>0.50) and lower for belief/decision-making questions (kappa<0.40). The predicted probability of always having condomless sex was 0.60 (95% CI:0.57,0.64) when dyads agreed with U = U and the HIV-positive partner was virally suppressed. The likelihood of always having condomless sex was low when the HIV-positive partner was not virally suppressed, whether or not dyads agreed with U = U (predicted probability range: 0.08;95% CI:0.06,0.11 to 0.25;95% CI:0.17,0.33), or when only one partner agreed with U = U (predicted probability range:0.02;95% CI:0.01,0.02 to 0.11;95% CI:0.07,0.15).
conclusionsDyad-level U = U agreement, viral suppression, and views of both partners were key factors in mixed HIV-status couples' decisions to have condomless sex. Future representative studies among sexual identity and racialized minority sub-populations are needed to better understand how mixed HIV-status relationships receive and apply U = U messaging, with a focus on partner age and the duration of HIV within relationships.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.