Observational studyThe lancet. HIV2025
HIV seropositivity and viral non-suppression in transgender, non-binary, and gender-diverse people in primary care receiving gender-affirming hormone therapy in the USA between 2013 and 2019 (LEGACY): an observational, longitudinal, cohort study.
Observational study in The lancet. HIV, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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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
3 citing papers in PubMed.
- Perspectives on PrEP/PEP Integration in Telehealth Gender-Affirming Care: A Survey of Clients From a National Telehealth Platform.Open forum infectious diseases · 2026Article
- Review
- The HIV Reservoir and Immune Landscape Across the Life Course of Women: Implications for Cure Strategies.American journal of reproductive immunology (New York, N.Y. : 1989) · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
13 authors.
Funding
Abstract
backgroundGender-affirming hormone therapy is medically necessary for many transgender, non-binary, and gender-diverse (trans) individuals and might improve HIV clinical outcomes for trans people. This study evaluated gender-affirming hormone therapy delivered in primary care as an intervention to improve HIV outcomes for trans adults in the USA.
methodsLEGACY is a longitudinal cohort of trans adult participants receiving primary care at two US federally qualified health centres: Fenway Health (Boston, MA, USA) and Callen-Lorde Community Health Center (New York, NY, USA). Eligibility criteria were age at least 18 years, gender identity differing from assigned sex at birth, past 12-month medical visit, and signed consent with no research exclusion documented in electronic health record data. Eligible participants contributed electronic health data from 2013 to 2019. The exposure was gender-affirming hormone therapy prescription. Clinical outcomes were HIV seropositivity (all participants) and viral non-suppression (participants with HIV; ≥200 copies per mL) in the past 12 months. Log-Poisson generalised estimating equations assessed the longitudinal association of gender-affirming hormone therapy prescription (puberty blockers, anti-androgens, oestrogens, progesterone, and testosterone) with outcomes, adjusting for individual-level confounders.
findingsAmong the 8109 trans participants in 2019, median age was 29 years (IQR 24-37). 2960 (36·5%) were transgender women, 2541 (31·3%) were transgender men, 1507 (18·6%) were non-binary, and 1101 (13·6%) were another trans identity. 4446 (54·8%) were White, 1323 (16·3%) were Black or African American, 498 (6·1%) were multiracial, and 1663 (20·5%) were Hispanic or Latinx. 2736 (33·7%) of 8109 participants were publicly insured and 451 (5·6%) participants were uninsured. In 2013, 2549 (85·5%) of 2983 participants were prescribed gender-affirming hormone therapy, 272 (9·1%) of 2983 participants were HIV seropositive, and 61 (22·4%) of 272 participants were not virally suppressed. In 2019, 7252 (89·4%) of 8109 participants were prescribed gender-affirming hormone therapy, 560 (6·9%) of 8109 participants were HIV seropositive, and 88 (15·7%) of 560 participants were not virally suppressed. Gender-affirming hormone therapy prescription was associated with reduced rates of HIV seropositivity (adjusted risk ratio [RR] 0·63, 95% CI 0·56-0·70) and viral non-suppression (adjusted RR 0·56, 95% CI 0·45-0·69) across follow-up.
interpretationGender-affirming care is important for optimising HIV outcomes among trans people. Our results underscore the vital role of gender-affirming models of care and access to gender-affirming hormone therapy for trans people.
fundingPatient-Centered Research Outcomes Institute and the National Institutes of Health.
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