Do psychosocial factors mediate sexual minorities' risky sexual behaviour? A twin study

Patterns of Sexual Risk Behaviors and Sexuality-Related Risk Factors among Young Adults in Germany: Implications for Prevention and Therapy

Sexual risk behavior (SRB) includes behavioral (sex without contraception, sexualized substance use, sex work, sexual partner violence, other sexual activities that harm oneself or others) and affective subtypes (sexuality-related feelings of shame/guilt, relationship impairments) and leads to psychosocial and health-related consequences. Young adults comprise a vulnerable group regarding the development of SRB. The study aimed to identify SRB patterns among young adults and their relation to sexuality-related risk factors. A cross-sectional online survey measured behavioral and affective aspects of SRB with nine items. Latent class analysis was conducted to identify patterns of SRB. Gender, sexual orientation, age of first intercourse, number of sexual partners, hypersexuality, and sexual dysfunction were captured as risk factors via multinomial logistic regression. Within this convenience sample (n = 609; nfemale = 365; nmale = 245; Mage = 23.1 years), the SRB patterns unremarkable (67%; low values in all SRB subtypes), shame-ridden (17%; high values in sexual feelings of shame/guilt) and risky sexual behavior (16%; high values in all subtypes of SRB, especially sexualized drug use) were identified. The shame-ridden and risky patterns were strongly associated with higher hypersexuality values, the risky pattern moreover with being non-heterosexual, of younger age at first sexual experience, and a higher number of sexual partners. Male and sexual minority participants demonstrated SRB more often than females and heterosexuals. Within prevention and treatment of SRB, it seems beneficial to address sexuality-related feelings of shame/guilt and addictive patterns (concerning sexual behaviors/substances) via gender- and diversity-sensitive measurements.

Childhood Gender Nonconformity and Parental Maltreatment as Mediators of Sexual Orientation Disparities in Childhood Emotional and Behavioral Difficulties

The mechanisms underlying sexual orientation differences in psychopathology originating in childhood remain understudied since sexual orientation does not directly manifest in childhood. This study tested whether childhood gender nonconformity and parental maltreatment before age 6 years 9 months partly explained sexual orientation disparities in the developmental trajectories of emotional and behavioral difficulties from age 6 years 9 months to 11 years 8 months. The Avon Longitudinal Study of Parents and Children was used (2182 boys and 2422 girls, Mage = 15.5, 90% White). After controlling for early life factors, non-heterosexual boys and girls displayed significantly greater emotional and behavioral difficulties than their heterosexual counterparts at all three ages. There was a sex difference in the mediating effects. For girls, sexual orientation disparities in childhood emotional and behavioral difficulties were partially explained by childhood gender nonconformity. For boys, sexual orientation disparities in childhood emotional and behavioral difficulties were partially explained by a path through greater childhood gender nonconformity, leading to increased risk of being the targets of parental maltreatment. Childhood gender nonconformity, parental maltreatment, and other early life factors only partially explain sexual orientation disparities in childhood emotional and behavioral difficulties. The mediating effects of childhood gender nonconformity and parental maltreatment on the association between sexual orientation and childhood emotional and behavioral difficulties differ between the sexes.

Intimate Partner Violence Among Sexual Minority Women: A Scoping Review

Intimate partner violence (IPV) is prevalent among sexual minority women (SMW). However, compared to IPV research with heterosexual women and other LGBTQ+ population groups, SMW are understudied. We conducted a scoping review to examine the current state of knowledge about IPV among SMW, and to identify gaps and directions for future research. A search of Medline, Embase, CINAHL, and PsycINFO databases returned 1,807 papers published between January 2000 and December 2021. After independent reviewers screened these papers for relevance, 99 were included in the final review. Papers were included if they used quantitative methods and reported IPV data on adult SMW separately from other groups. Findings confirmed high rates of IPV among SMW and highlighted groups with particular vulnerabilities, including non-monosexual women and SMW of color. Risk factors for IPV in this population include prior trauma and victimization, psychological and emotional concerns, substance use, and minority stressors. Outcomes include poor mental and physical health. Findings related to the effects of minority stressors on IPV and comparisons across sexual minority groups were inconsistent. Future research should focus on IPV perpetration; mechanisms underlying risk for IPV, including structural-level risk factors; and understanding differences among SMW subgroups.

Sexual Compulsivity Mediates the Association Between Childhood Sexual Abuse and Condom Use Resistance Among Men Who Have Sex with Men and Women

Despite the continued prevalence of HIV and condoms' proven effectiveness in HIV prevention, many young men continue to engage in condom use resistance (CUR). Research shows that sexual compulsivity and childhood sexual abuse (CSA) victimization are risk factors for CUR. Given that sexual activity between men is the most common method through which HIV is transmitted, and that men who have sex with men and women (MSMW) are up to five times as likely to contract or transmit HIV as men who have sex with women only (MSWO), understanding the CUR behaviors of MSMW is uniquely important. Young, single men who had had sex with a woman in the past year (N = 623) completed questionnaires assessing their previous sexual experiences with men and women, history of CSA, sexual compulsivity, and CUR to determine how MSMW classification may moderate the associations between these variables. Results revealed full, moderated mediation, such that CSA was significantly associated with sexual compulsivity among MSMW, but not MSWO. Furthermore, sexual compulsivity was subsequently associated with CUR, in a model accounting for 5.35% of CUR variance. Such findings suggest that exposure to CSA may render MSMW especially susceptible to maladaptive, sexually compulsive desires and behaviors. As a result, MSMW may be more likely to disregard the inherent risks associated with condomless sexual activity and engage in CUR. Thus, intervention programs seeking to reduce the transmission of HIV and other STIs should prioritize targeting MSMW who experienced CSA to reduce sexual compulsivity and increase condom use.

Exploring Relationships Between Internalizing Problems and Risky Sexual Behavior: A Twin Study

Previous research links risky sexual behavior (RSB) to externalizing problems and to substance use, but little research has been conducted on relationships between internalizing problems (INT) and RSB. The current study addresses that literature gap, using both a twin sample from Colorado (N = 2567) and a second twin sample from Minnesota (N = 1131) in attempt to replicate initial results. We explored the hypothesis that the latent variable INT would be more strongly associated with the latent variable RSB for females than for males, examining relationships between INT and RSB via phenotypic confirmatory factor analysis and multivariate twin analyses. We found a small but significant phenotypic association between the latent variables. However, despite using two large twin samples, limited power restricted our ability to identify the genetic and environmental mechanisms underlying this association. Our sex differences hypothesis was not fully supported in either sample and requires further investigation. Our findings illustrate the complexity of the relationship between internalizing problems and risky sexual behavior.

Same-Sex Marriage and Common Mental Health Diagnoses: A Sibling Comparison and Adoption Approach

We aimed to test whether the association between same-sex marriage and common mental health diagnoses was explained by shared genetic and environmental familial influences using sibling comparison and adoption analyses. For the sibling comparison analysis, participants (1,177,712 men and 1,266,917 women) were individuals born in Sweden between 1932 and 1994 and had ever been recorded as married (in opposite-sex or same-sex marriages). For the adoption analysis, participants were 147,164 and 1,298 female-female full sibling and adoptive sibling pairs, respectively. Based on medical records, prescribed medication, and death certificates, depression, substance abuse, and suicide (completed and attempted) from age 18 years were identified. For both sexes, being in a same-sex marriage was associated with greater risk of depression, substance abuse, and suicide, compared with being in an opposite-sex marriage. Controlling for shared familial confounding reduced this difference by less than 20% in magnitude, but overall mental health disparities for individuals in same-sex marriages remained statistically significant. Among women, only the genetic correlation between same-sex marriage and depression was statistically significant (r = .33). Same-sex marriage, as a proxy for sexual orientation, was associated with increased risk of certain mental health diagnoses and shared familial confounding explained a small component of this association, depending on the diagnosis. The findings indicate that sexual orientation disparities in mental health outcomes may involve unmeasured factors, and a relatively small proportion should be considered that may be due to shared familial confounding relevant to both sexual orientation and psychopathology.

Health Disparities by Sexual Orientation: Implications of Genetic and Environmental Explanations

Xu and colleagues add to the growing research literature on the role of potential familial (i.e., genetic and shared environment) causes in sexual orientation and in the relation between sexual orientation and poor mental health, in which lesbian, gay, bisexual, and other sexual minority individuals have poorer mental health than heterosexual individuals. I address several implications of the findings by Xu et al. and others. First, the nuance or complexity of genetics is considered, given the implications of genetics for health via a single gene, epistasis, or epigenetics. Second, I highlight the magnitude of the genetic relation between sexual orientation and psychopathology, suggesting some, but not all, sexual minority individuals may differ from heterosexual individuals on psychiatric vulnerability. In turn, this suggests that research should identify for whom or under what circumstances the relation holds. Third, I underscore the need for a within-subjects design, in which attention turns to differences among sexual minority individuals. Fourth, the need to reevaluate Minority Stress Theory, the predominant theory accounting for health disparities by sexual orientation, is addressed because of the implications of genetics for health. Fifth, I acknowledge the concern attached to genetic research for potentially compounding the stigmatization already experienced by sexual minority individuals. Nevertheless, this research is occurring and will likely increase in volume. It will inform understanding of sexual minority individuals.

Causal Influences of Same-Sex Attraction on Psychological Distress and Risky Sexual Behaviors: Evidence for Bidirectional Effects

Although health disparities among same-sex attracted compared to heterosexual individuals are typically explained by minority stress, there is limited evidence for a causal effect. This study investigated whether same-sex attraction was causally associated with psychological distress and risky sexual behavior using sociosexual behavior as a proxy. The sample comprised monozygotic and dizygotic twins and their non-twin siblings (n = 2036, 3780 and 2356, respectively) genotyped and assessed for same-sex attraction, psychological distress (anxiety and depressive symptoms), and risky sexual behavior. Causal influences were investigated with same-sex attraction as the predictor and psychological distress and risky sexual behavior as the outcomes in two separate Mendelian Randomization-Direction of Causation (MRDoC) models using OpenMx in R. The MRDoC model improves on the Mendelian Randomization and Direction of Causation twin models by allowing analyses of variables with similar genetic architectures, incorporating polygenic scores as instrumental variables and specifying pleiotropy and residual covariance. There were significant causal influences flowing from same-sex attraction to psychological distress and risky sexual behavior (standardized coefficients = 0.13 and 0.16; 95% CIs 0.03-0.23 and 0.08-0.25, respectively). Further analyses also demonstrated causal influences flowing from psychological distress and risky sexual behavior toward same-sex attraction. Causal influences from same-sex attraction to psychological distress and risky sexual behavior may reflect minority stress, which reinforces ongoing measures to minimize social disparities. Causal influences flowing in the opposite direction may reflect rejection sensitivity, stigma-inducing outcomes of risky sexual behavior, and recall bias; however, further research is required to specifically investigate these processes.

Bidirectional Causal Associations Between Same-Sex Attraction and Psychological Distress: Testing Moderation and Mediation Effects

Only one study has examined bidirectional causality between sexual minority status (having same-sex attraction) and psychological distress. We combined twin and genomic data from 8700 to 9700 participants in the UK Twins Early Development Study cohort at ≈21 years to replicate and extend these bidirectional causal effects using separate unidirectional Mendelian Randomization-Direction of Causation models. We further modified these models to separately investigate sex differences, moderation by childhood factors (retrospectively-assessed early-life adversity and prospectively-assessed childhood gender nonconformity), and mediation by victimization. All analyses were carried out in OpenMx in R. Same-sex attraction causally influenced psychological distress with significant reverse causation (beta = 0.19 and 0.17; 95% CIs = 0.09, 0.29 and 0.08, 0.25 respectively) and no significant sex differences. The same-sex attraction → psychological distress causal path was partly mediated by victimization (12.5%) while the reverse causal path was attenuated by higher childhood gender nonconformity (moderation coefficient = -0.09, 95% CI: -0.13, -0.04).

Neuroticism and Sexual Orientation-Based Victimization as Mediators of Sexual Orientation Disparities in Mental Health

This study tested whether elevated risk of poorer mental health outcomes among nonheterosexual adolescents compared with heterosexual adolescents is plausibly explained by neuroticism and sexual orientation-based victimization. The Millennium Cohort Study, a large British prospective birth cohort, was used (4566 heterosexual boys, 77 bisexual boys, 129 homosexual boys, 96 asexual boys, 4444 heterosexual girls, 280 bisexual girls, 158 homosexual girls, and 182 asexual girls). We analyzed the following measures assessed at age 17 years: sexual orientation based on sexual attraction, neuroticism, sexual orientation-based victimization, self-harm attempts, and psychological well-being. Mediation analysis was undertaken separately by sex and yielded the following statistically significant findings: for both sexes, we found that bisexual and homosexual adolescents scored higher than heterosexual adolescents on neuroticism; for both sexes, bisexual and homosexual adolescents reported more negative psychological well-being scores and self-harm attempts compared with heterosexual adolescents, with total effects (standardized regression coefficients) ranging from .58 to .91; those associations were mediated through sexual orientation-based victimization and neuroticism scores, with the indirect effects (standardized regression coefficients) through sexual orientation-based victimization and neuroticism scores ranging from .09 to .26 and .16 to .55, respectively. Asexual adolescents did not differ significantly from their heterosexual counterparts in psychological well-being and self-harm attempts, with the total effects ranging from - .02 to .21. Sexual orientation-based victimization and neuroticism may both contribute to the sexual orientation-related disparities in psychological well-being and self-harm attempts. However, neuroticism appears to the more powerful factor.