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Latent class analysis was used to identify distinct groups based on types of tobacco and cannabis products used. The socio\u2010demographic, health\u2010rated correlates and past\u2010year substance use of each latent class was examined.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A four\u2010class solution was identified: co\u2010use of tobacco and cannabis (2.4%), cannabis\u2010only (5.5%), tobacco\u2010only (8.0%) and non\u2010user (84.0%). Males (odds ratio [OR] range 1.5\u20132.9), younger age (OR range 2.4\u20138.4), moderate to high psychological distress (OR range 1.3\u20133.0), using illicit substances in the last year (OR range 1.41\u201322.87) and high risk of alcohol use disorder (OR range 2.0\u201321.7) were more likely to be in the tobacco\/cannabis use classes than non\u2010users. Within the co\u2010use class, 78.4% mixed tobacco with cannabis and 89.4% had used alcohol with cannabis at least once.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion and Conclusions<\/jats:title><jats:p>Approximately 16% of respondents used tobacco or cannabis, or both substances, and no major distinct subgroups were identified by the use of different product types. Mental health issues and the poly\u2010substance use were more common in the class who were co\u2010users of cannabis and tobacco. Existing policies need to minimise cannabis and tobacco\u2010related harms to reduce the societal burden associated with both substances.<\/jats:p><\/jats:sec>","DOI":"10.1111\/dar.13614","type":"journal-article","created":{"date-parts":[[2023,2,13]],"date-time":"2023-02-13T17:00:22Z","timestamp":1676307622000},"page":"815-826","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["A latent class analysis of patterns of tobacco and cannabis use in Australia and their health\u2010related correlates"],"prefix":"10.1111","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1595-6307","authenticated-orcid":false,"given":"Carmen C. 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