The prevalence of substance use among lesbian, bisexual and queer (LBQ) women in Australia is significantly higher than in the general community, with some evidence of earlier initiation and more problematic use. Existing sources of evidence on substance use among LBQ women in Australia are cross-sectional, geographically limited, and do not capture risk and protective factors of specific relevance to this population (e.g. minority stress, cultural norms). As such, we know little about the patterns and contexts of LBQ women’s substance use over time, and the factors that influence different patterns of use. A cohort study designed for LBQ women will allow investigation of evidence-based and theory-informed causes of problematic substance use and changes in use over time.
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