A large national follow-up in the United States suggests that gender-affirming medical care is associated with a significant reduction in posttraumatic stress symptoms among transgender and gender-expansive people. The results, published in Journal of Traumatic Stress, point out that relief comes mainly as interventions accumulate over time and would be an indirect consequence of improved mood and reduced minority stress.
A heavy psychological burden
Transgender and gender-expansive (TGE) individuals show rates of posttraumatic stress disorder (PTSD) markedly higher than those of the general population. Exposure to discrimination, violence and social rejection, grouped under the concept of "minority stress", has been identified as one of the main drivers of this greater risk. The clinical question is whether gender-affirming medical interventions, such as hormone therapy or surgery, can change the course of that psychological burden.
Following more than 2,500 people
The team at the University of California, San Francisco, analyzed data from a national cohort study involving 2,514 TGE people who had received at least one gender-affirming medical intervention between 2019 and 2022. Instead of a single measurement, researchers followed participants year after year and applied two complementary statistical models: an interrupted time series analysis, which detects changes at the moment an intervention occurs, and a mixed model relating the cumulative number of interventions to the evolution of symptoms.
Relief appears with accumulation
The results showed significant drops in posttraumatic stress scores. The clearest effect appeared from the third medical intervention onward, when scores fell markedly in both adjusted and unadjusted analyses. In addition, each additional accumulated intervention was associated with a small but steady reduction in symptoms. The authors interpreted that the improvement occurs partly because affirming care reduces minority stress and depressive symptoms, two factors that in turn fuel posttraumatic distress.
An indirect pathway to improvement
The study also examined the mechanisms behind the relationship. Using structural equation models, it found that the reduction in posttraumatic symptoms was partly mediated by decreases in minority stress and depression. In other words, affirming care would not act directly on PTSD but indirectly: by easing general distress and the weight of discrimination, it makes posttraumatic symptoms more manageable.
Clinical implications
Although the observational design does not allow establishing causality, the findings reinforce the idea that gender-affirming care can contribute to the psychological well-being of trans people. The authors highlight the potential benefit of these interventions for reducing the burden of PTSD in this population and call for further longitudinal evidence to support clinical and health-care decisions.
Source: Brennan JM, Lisha NE, Tran NK, Davis K, Obedin-Maliver J, Lunn MR, Flentje A. Posttraumatic stress symptom reduction after gender-affirming medical interventions: A longitudinal study. Journal of Traumatic Stress, 2026. DOI: 10.1002/jts.70065.
