Using baseline data from 8,384 participants enrolled in the TREASURE cohort in Chengdu, researchers examined three exposure categories: adverse childhood experiences, lifetime trauma, and LGBTQ+-related adversities. Participants’ depressive symptoms were assessed with self-report measures, enabling a population-level view of mental health burden at the time of enrollment.

The results show that trauma exposure was widespread: 92.7% of participants reported having experienced at least one traumatic event. Even more striking, LGBTQ+-related adversities were reported by 87.3% of participants, underscoring how identity-linked stressors may be nearly ubiquitous in this context.

Depressive symptoms were present in 30.2% of the sample. In multivariable models, trauma exposure was strongly associated with depressive symptoms, with an adjusted odds ratio of 11.00 (95% CI, 7.39–16.39). The magnitude of this association suggests that trauma is not just correlated with distress but may be a central risk factor.

The study also reports a dose–response pattern. Each additional traumatic event corresponded to a 10% higher risk of depressive symptoms (95% CI, 9–11%). This gradient strengthens the causal plausibility of a trauma–depression link, even though the study design cannot confirm temporality.

To explore how trauma might “get under the skin,” the authors conducted a sequential mediation analysis. The approach tested whether specific downstream factors explained part of the trauma–depression association through intermediate pathways.

Unfavourable behavioural factors emerged as mediators, particularly smoking, which accounted for a mediated proportion ranging from 14.99% to 40.23%. Lower social support contributed a further 7.91% to 33.08%, while negative coping strategies mediated 1.79% to 37.66% of the association.

Together, these findings suggest that trauma’s impact may be amplified through behaviour and social-psychological mechanisms that undermine resilience and increase vulnerability to depression. The work frames trauma as both an exposure and a catalyst for cascading risk factors.

Although the authors caution that the cohort is not fully representative, the data are cross-sectional, and all key measures are self-reported, the study nonetheless highlights a critical public-health signal: trauma exposure is pervasive and closely linked to depressive symptoms among Chinese LGBTQ+ individuals.

Subject of Research: LGBTQ+ mental health and trauma–depression pathways in China

Article Title: Association of traumatic experiences with depressive symptoms among LGBTQ+ population in China

Article References: https://doi.org/10.1038/s41562-026-02518-0

DOI: https://doi.org/10.1038/s41562-026-02518-0

Keywords: Trauma exposure; depressive symptoms; LGBTQ+-related adversities; adverse childhood experiences; mediation; China; social support; coping