Quick summary: A large Finnish study found that adolescents referred to gender identity services had far higher rates of psychiatric treatment than the general population, and those rates continued to rise after gender reassignment rather than improving. Research shows that the evidence base for medical gender interventions in young people has always been thin, and that severe mental health problems may not be primarily caused by gender dysphoria. The findings point towards a need for thorough psychiatric assessment and treatment before any gender-related medical pathway is considered.
Adolescents who seek gender-related medical treatment continue to experience significant mental health difficulties even after undergoing gender reassignment, according to a major new study from Finland. The findings raise serious questions about the assumption that medical intervention relieves the psychiatric burden carried by young people with gender dysphoria.
The study, published in Acta Paediatrica, tracked over 2,000 individuals under the age of 23 who contacted specialist gender identity services in Finland between 1996 and 2019. Each participant was matched with eight population controls for comparison, giving researchers a large and nationally representative picture of psychiatric need over nearly three decades.
Sami-Matti Ruuska, MD, specialist in adolescent psychiatry, PhD student, and researcher at Tampere University, offered context on the state of existing evidence. “There is a dearth of methodologically robust research on the treatment of paediatric gender dysphoria. The previous studies are limited, for example, by short follow-up times, lack of matched population controls, and small sample sizes. Despite these shortcomings, medical interventions were quickly adopted as the so-called gold standard treatment for gender dysphoria in adolescence. To adopt so widely something with so little high-quality evidence could be considered an outlier in medicine.”
Before attending gender identity services, 45.7% of the gender-referred group had already received specialist-level psychiatric treatment, compared with 15% of controls. Two or more years after referral, that figure rose to 61.7% in the gender-referred group, while the control group remained stable at around 14.6%. The scale of the difference is striking and persisted across both males and females.
Among young people who went on to receive medical gender reassignment, the increase in psychiatric need was particularly sharp. Those who underwent feminising treatment saw psychiatric morbidity rise from 9.8% before referral to 60.7% in follow-up. For those who received masculinising treatment, rates climbed from 21.6% to 54.5%. These figures challenge the widely cited expectation that gender-affirming medical care substantially reduces mental health difficulties in adolescents.
Researchers also found that those who first contacted gender identity services after 2010 carried a heavier psychiatric burden than earlier cohorts. Around half of those referred between 2011 and 2019 had already needed psychiatric care before they attended gender services. This proportion had doubled compared with those seeking assessments in the period from 1996–2010,suggesting a meaningful shift in the profile of young people now being referred. No similar trend was observed in the controls.
Dr Ruuska pointed to what the findings may reveal about the relationship between mental health and gender identity. “The results may suggest that, for some young people experiencing gender-related distress, underlying mental health difficulties may present themselves as challenges related to gender identity. It is also important to note that, based on these findings, severe mental health problems do not appear to be primarily explained by gender dysphoria. In addition, it is possible that for some of these young people, some of these medical interventions may even have a negative impact on mental health through different mechanisms.”
The study used multivariable analysis to control for prior psychiatric history, birth year, and year of referral. Even after these adjustments, gender-referred adolescents faced risks of subsequent psychiatric treatment that were approximately three times higher than female controls and five times higher than male controls. Crucially, this elevated risk was consistent regardless of whether the individual had undergone medical treatment or not.
The authors note that oestrogen has been associated with depressive symptoms in some research contexts, which may partly account for the increased psychiatric need seen among those who received feminising treatment. They also point out that the overrepresentation of prior psychiatric history among those who did not receive medical treatment likely reflects established clinical practice, where severe mental health conditions can act as a contraindication for proceeding with gender reassignment.
Dr Ruuska was clear about the clinical implications. “In light of these findings, and also considering what previous research has shown, that severe mental illness can interfere with the development of a stable sense of identity, it would not be appropriate to pursue a more detailed assessment of gender identity, let alone medical gender reassignment, in the presence of severe psychiatric problems. It is paramount to properly identify and treat these psychiatric problems in these youth.”
