Variables of Negative Impact on Mental Health in the LGBT Population: Identification of Measurement Scales—A Systematic Review

The scientific literature was reviewed to systematically identify and characterize validated scales measuring homophobia, lesbophobia, biphobia, and transphobia, as well as the biopsychosocial consequences derived from these attitudes in sexual and gender minority (SGM) populations. The search was conducted in the WOS, Scopus, and Medline databases, limited to studies published between January 2015 and January 2024. This review was registered in the International Prospective Register of Systematic Reviews, and its quality was evaluated using the Effective Public Health Practice Project instrument. The criteria of the PRISMA declaration for systematic reviews were applied. Among the 78 articles initially selected, 9 met the established eligibility criteria. In these 9 articles, 13 validated scales were identified, covering attitudes toward sexual and gender minorities, internalised stigma, minority stress and resilience, parental acceptance, and experiences of bullying and cyberbullying in SGM populations. The findings reveal substantial fragmentation in the available measurement landscape, with most instruments lacking cross-cultural validation, measurement invariance testing, and construct coverage beyond Western, English- or Spanish-speaking contexts. These results should be interpreted with caution given the limited number of included studies and the absence of meta-analytic quantification. This review proposes the development of a novel intermodular measurement system as a priority research agenda and identifies key implications for specialized psychiatric and clinical practice, public health surveillance, and future research.