Prevalence of adult sexual abuse in men with mental illness: Bayesian meta-analysis

Background Sexual abuse is a broad category of traumatic experiences that includes rape and any unwanted sexual contact with a body part or foreign object, whether penetrative, oral or otherwise. Although patients with mental illness have a higher risk of becoming victims of sexual abuse in adulthood, few studies investigate the proportion of male victims in this population. Their underrepresentation in research is a barrier to understanding the negative outcomes associated with sexual abuse in men. Aims We estimated the prevalence of recent (past year) and adulthood sexual abuse perpetrated by any perpetrator and separately by intimate partners in males diagnosed with a mental illness. Method To model the prevalences and heterogeneity arising from reports, we used Bayesian multilevel models. Prevalences were estimated for mixed-diagnosis, substance misuse, intellectual disability and post-traumatic stress disorder samples, and studies reporting specifically on intimate partner violence. This review was registered through PROSPERO (CRD42020169299) Results Estimated adult sexual abuse was 5.3% (95% Credibility Interval 1.6–12.8%) for past-year abuse and 14.1% (95% Credibility Interval 7.3–22.4%) for abuse in adulthood. There was considerable heterogeneity of prevalence between studies and diagnosis groups. Conclusions Our analyses show that the prevalence of sexual abuse of males diagnosed with a mental illness was much higher than for men in the general population. This has important implications regarding the proportion of undetected or untreated sexually abused men in clinical practice.

The Role of Gender in Violence Experienced by Adults With Developmental Disabilities

Violence against people with developmental disabilities is a highly prevalent yet understudied phenomenon. In particular, there is a paucity of literature surrounding the role of gender and the experiences of men. Using a cross-sectional study design, we surveyed 350 people with diverse developmental disabilities about experiences of abuse, perpetrators of abuse, and their physical and mental health status. These data were analyzed to determine whether gender influenced these domains. Statistical methods included chi-square, independent t tests, logistic regression, and hierarchical multiple regressions. Male and female participants reported abuse at high rates, with 61.9% of men and 58.2% of women reporting abuse as children and 63.7% of men and 68.2% of women reporting abuse as adults. More women than men reported adult sexual abuse, but there was no gender difference in the prevalence of any other form of abuse. Women were more likely than men to identify an intimate partner as their abuser, although intimate partners represented the minority of abusers for both men and women. Violence was associated with worse health status regardless of participant gender. These findings confirm that violence is an important issue for both men and women with developmental disabilities. Although some expected gender differences arose, such as higher rates of adult sexual abuse and intimate partner violence against women, these differences were less pronounced than they are in the general population, and the overall picture of abuse was one of gender similarities rather than differences.