Lesbian, gay, and bisexual (LGB) youth experience elevated levels of depressive symptoms compared to heterosexual youth. This study examined how differences in depressive symptoms between heterosexual and LGB youth developed from late childhood to early adulthood. The association between sexual orientation and depressive symptoms was estimated from age 11 to 22 using data from the TRacking Adolescents’ Individual Lives Survey, a longitudinal Dutch cohort study. Of the 1738 respondents (54.8 % girls) that provided information on sexual orientation, 151 self-identified as LGB. In line with the Minority Stress Framework, it was tested whether self-reported peer victimization and parental rejection mediated the association between sexual orientation and depressive symptoms. Results indicated that LB girls and bisexuals were at increased risk of depressive symptoms already at age 11. The difference increased over time and was related to pubertal development in girls and bisexual individuals. Furthermore, self-reported peer victimization (for both boys and girls), as well as parental rejection (for girls/bisexuals), mediated the association between sexual orientation and depressive symptoms. The authors conclude that already in late childhood, associations between sexual orientation and depressive symptoms are found, partly due to minority stress mechanisms.Electronic supplementary materialThe online version of this article (doi:10.1007/s10964-015-0403-0) contains supplementary material, which is available to authorized users.

Bisexual individuals experience poorer mental health than other sexual minority individuals. One explanation for this is that biphobia predisposes bisexual individuals to have a more ambiguous sexual identity and fewer opportunities for stress-ameliorating forms of coping and support. This study explores sexual identity and sexual identity dimensions—prominence, valence, integration, and complexity—in bisexual and other sexual minority individuals. We describe differences in sexual identity dimensions between bisexual and other sexual minority individuals and test two explanations for mental health disparities between them: whether sexual identity dimensions directly impact mental health and whether they moderate the impact of stress on mental health. Data came from a longitudinal study of a diverse sample of sexual minority individuals (N = 396, 71 bisexual respondents) sampled from community venues in New York City. Sexual identity was prominent for both bisexual and other sexual minority individuals, but bisexual individuals reported lower valence and integration of sexual identity in their identity structures. The hypothesis that sexual identity dimensions moderate the impact of minority stress on mental health was not supported. Following several longitudinal assessments, however, we concluded that identity valence (but not integration or complexity) and depressive symptoms were bi-directionally associated so that differences in valence between bisexual and other sexual minority individuals explained, in part, disparities in depressive symptoms.

Lesbian, gay, and bisexual (LGB) adolescents experience elevated levels of internalizing problems and use more substances than heterosexual adolescents. The minority stress and psychological mediation framework are complementary theoretical frameworks that were developed to explain these disparities. However, limited empirical research has integrated both frameworks to study health disparities between heterosexual and LGB adolescents. This study attempts such an integration, using data from the first five waves (participant age 11-22) of the TRacking Adolescents' Individual Lives Survey (TRAILS), a cohort study of Dutch adolescents (N = 1738; 151 LGB; 54.8% girls). It was tested whether an LGB identity was linked to internalizing problems and substance use through a serial mediation process, in which sexual identity would be associated with peer victimization and negative relationships with parents (first set of mediators, in keeping with the minority stress framework), which in turn would be associated with fear of negative social evaluation and a lack of social support (second set of mediators, in keeping with the psychological mediation framework), and eventually increasing the risk for internalizing problems and elevated levels of substance use. Moreover, it was tested whether the link between minority stress and substance use was mediated by peers' substance use levels, as hypothesized by the psychological mediation framework. Compared to heterosexual participants, LGB participants reported more internalizing problems, smoked more cigarettes, and used more marijuana, but did not consume more alcohol. The relation between sexual identity and internalizing problems was mediated by peer victimization and parental rejection, which is in line with the minority stress framework. No statistically significant support was found for the psychological mediation framework. These findings provide a better understanding of the pathways through which sexual identity disparities in mental wellbeing and substance use come about.