Cannabis dispensary exposure and smoked, vaped and edible cannabis use among young adults: Comparison of web‐scraped and government‐maintained registries

Abstract Background and aims: The impact of exposure to cannabis dispensaries on young adult cannabis use may depend on how exposures and outcomes are defined. We estimated associations of dispensary exposure with young adult cannabis use across: (a) a government‐maintained licensed dispensaries registry versus a web‐scraped list of licensed and unlicensed dispensaries; and (b) varying modes of cannabis modes (i.e. smoked, edible, vaped). Methods: This study used three waves of data (2021–2023) from a prospective cohort of n = 2277