Protocol for a systematic review of substance use and misuse prevalence and associated factors among transgender and non-binary youth living in the USA

Background Transgender and gender non-binary (TNB) youth living in the USA report elevated levels of substance use compared with their cisgender counterparts, with previous literature pointing to minority stressors as some of the factors that could facilitate such elevated levels. Yet, substance use and misuse prevalence and associated modifiable factors among TNB youth are not fully known. The current paper details the protocol for a systematic review aimed at (1) identifying substance use and misuse prevalence among TNB youth (ages <25) and related demographic disparities (based on racial, ethnic and gender identity, and sexual orientation), (2) examining factors associated with substance use and misuse among TNB youth and (3) examining protective factors against substance use and misuse among TNB youth. Methods and analysis Systematic searches will be conducted across four databases: PubMed, LGBTQ+ Source, CINAHL and PsycInfo to identify quantitative, qualitative and mixed-methods peer-reviewed research publications. An exhaustive list of keywords and corresponding MeSH (Medical Subject Headings) terms representing the concepts of 'TNB' (the population of interest) and 'substance use and misuse' (outcome) will be employed. Identified records will be initially screened via a review of titles and abstracts. Full text of the remaining records will be reviewed corresponding to the inclusion and exclusion criteria. Extracted data will be synthesised in table and narrative format. A meta-analysis will be considered contingent on the existence of sufficient data. Methodological quality and risk of bias of studies will be assessed. Ethics and dissemination This review does not require approval from the Institutional Review Board as it involves no interactions with human subjects. We will disseminate our findings via peer-reviewed manuscripts and academic conference presentations. PROSPERO registration number CRD42023394985.