The aim of this study was to conduct the first meta-analysis comparing risk for NSSI between sexual minority and heterosexual persons. Eleven published and 4 unpublished studies were reviewed, describing associations between sexual orientation and NSSI in 7,147 sexual minority and 61,701 heterosexual participants. The overall weighted effect size for the relationship between sexual orientation and NSSI using a random-effects model was OR = 3.00 (95% CI = 2.46-3.66), indicating a medium-to-large effect. Sexual minority adolescents and bisexuals were found to be at particularly high-risk. These findings highlight the need to examine mechanisms linking sexual orientation and NSSI in future research. Building on these findings can add to understanding the associations between sexual orientation, NSSI, and suicidality, as well as prevention/intervention.
Keywords: LGBQ; NSSI; meta-analysis; non-suicidal self-injury; sexual orientation.