By Dr Janni Leung

Book Chapters

Leung J; Hall W; Degenhardt L, 2020, 'Adolescent cannabis use disorders', in Adolescent Addiction Epidemiology Assessment and Treatment, pp. 111 - 135, http://dx.doi.org/10.1016/B978-0-12-818626-8.00004-9

Ferrari AJ; Erskine HE; Charlson FJ; Santomauro DF; Leung J; Whiteford HA, 2018, 'The global burden of mental and substance use disorders', in Bhugra D; Bhui K; Wong SYS; Gilman SE (ed.), Oxford Textbook of Public Mental Health, Oxford University Press, pp. 35 - 44, http://dx.doi.org/10.1093/med/9780198792994.003.0004

Journal articles

Johnson B; Leung J; Chan GCK, 2026, 'Authors’ Reply: Same Name, Moving Target: Model Version Drift in Syntheses of Large Language Models for Mental Health', JMIR AI, 5, pp. e112028, http://dx.doi.org/10.2196/112028

Vu GT; Valeria A; Johnson B; Connor J; Chan G; Leung J, 2026, 'Alcohol’s harm to others among adults in Australia: Findings from the 2022–2023 national drug and health household survey', International Journal of Drug Policy, 156, http://dx.doi.org/10.1016/j.drugpo.2026.105444

Wilson J; Sunderland M; O'Dean S; Slade T; Dawson D; Dobson O; Leung J; Chan G; Teesson M; Hall W; Newton N; Lorenzetti V; Stockings E, 2026, 'Confusing Uncertainty With Bias: The Challenges of Working With Real-World Data', Drug and Alcohol Review, 45, http://dx.doi.org/10.1111/dar.70242

Chan GCK; Saunders JB; Stjepanović D; McClure-Thomas C; Connor J; Hides L; Wood A; King D; Siste K; Gullo M; Long J; Leung JK, 2026, 'Correction to: The gaming disorder identification test (GADIT) - A screening tool for gaming disorder based on ICD-11', Journal of Behavioral Addictions, 15, pp. 1171 - 1172, http://dx.doi.org/10.1556/2006.2024.11138

Johnson B; Kai Chan GC; Saunders JB; Stjepanović D; van den Brink W; McClure-Thomas C; Long J; Siste K; Zhao M; Zhong N; Widdershoven P; Kaag AM; Leung J, 2026, 'Financial harms of regular gaming: Cross-national evidence from the international gaming survey', Journal of Behavioral Addictions, 15, pp. 1084 - 1091, http://dx.doi.org/10.1556/2006.2026.00092

Leung J; Chan GCK; Zhang R; Hall WD; McClure-Thomas C, 2026, 'Sociodemographic Trends in Daily, Weekly and Less Than Weekly Cannabis Use in Australia', Drug and Alcohol Review, 45, http://dx.doi.org/10.1111/dar.70207

Yuen WS; Miller M; Man N; Livingston M; Chrzanowska A; Clare P; Akhurst J; Tierney L; Da Silva K; Blakey P; Bryant W; Chan G; Leung J; Peacock A, 2026, 'Age period cohort trends in alcohol treatment episodes across Australia from 2003 to 2022', Addiction, 121, pp. 2154 - 2165, http://dx.doi.org/10.1111/add.70450

Wilson J; Dobson O; Langcake A; Mishra P; Bryant Z; Leung J; Dawson D; Graham M; Teesson M; Freeman TP; Hall W; Chan GCK; Stockings E, 2026, 'Efficacy and safety of cannabinoids – Authors’ reply', Lancet Psychiatry, 13, pp. 642 - 643, http://dx.doi.org/10.1016/S2215-0366(26)00198-7

Vu GT; Sun T; Connor JP; Thai P; Gartner C; Hall W; Leung J; Chan G, 2026, 'Patterns and Correlates of Disposable E-Cigarette Use Among U.S. Youth', American Journal of Preventive Medicine, 71, http://dx.doi.org/10.1016/j.amepre.2026.108352

Yimer TM; Fekadu W; Leung J; Mihretu A; Teferra S, 2026, 'Regional perspectives: Substance use related problems in Ethiopia', Addiction, 121, pp. 1934 - 1941, http://dx.doi.org/10.1111/add.70392

Hall W; Yimer TM; Thorne RL; Hoch E; Burke C; Gridley A; Hurd YL; Wilson J; Leung J; Freeman TP, 2026, 'Relationships between cannabis use and mental disorders: assessing the coherence of evidence from studies with different methodologies', Lancet Psychiatry, 13, pp. 604 - 614, http://dx.doi.org/10.1016/S2215-0366(26)00086-6

Mitter F; Sheptooha A; Leung J; Ketheesan S; Akosile W, 2026, 'Psychedelic-Assisted Psychotherapy for the Treatment of PTSD: A Systematic Review and Meta-Analysis', Psychoactives, 5, pp. 16, http://dx.doi.org/10.3390/psychoactives5020016

McClure-Thomas C; Yimer T; Strong C; Sun T; Hall WD; Chan GCK; Connor JP; Leung J, 2026, 'A systematic review and meta-analysis of self-reported exposure to cannabis advertising and its association with cannabis use and intentions', Addiction, 121, pp. 1343 - 1361, http://dx.doi.org/10.1111/add.70310

Dawson D; Stjepanović D; Leung J; Lim C; Hall W; Lorenzetti V; Chan G; Hammond D, 2026, 'Self-reported reasons for medical and nonmedical cannabis use in Australia: A cross-sectional analysis of the International Cannabis Policy Study 2023', Drug and Alcohol Dependence, 283, http://dx.doi.org/10.1016/j.drugalcdep.2026.113124

Sun Y; Zhang Z; Wu S; Wang Y; Ravindran A; Leung J; Chen R; Chang Z; Shi J; Qi J; Bao Y; Zhou M; Lu L, 2026, 'Burden of mental and substance use disorders in China and its provinces, 1990-2021: a systematic analysis for the Global Burden of Disease Study 2021', Molecular Psychiatry, 31, pp. 2711 - 2726, http://dx.doi.org/10.1038/s41380-025-03419-w

Johnson B; Chan G; Connor J; Stjepanovic D; Leung J; Sun T, 2026, 'Non-Medical Use of Prescription Stimulants in Australia: Prevalence, Sociodemographic and Substance Use Correlates From the 2022–2023 National Drug Strategy Household Survey', Drug and Alcohol Review, 45, http://dx.doi.org/10.1111/dar.70168

, 2026, 'RETRACTION: Proportions and Correlates of High‐Risk Cannabis Use in Australia—A Cross‐Sectional Analysis of the 2022–2023 National Drug Strategy Household Survey', Addiction, http://dx.doi.org/10.1111/add.70453

Verhagen R; Gerber C; Thai P; Bade R; O'Brien J; Keller EL; Simpson BS; Hall W; Leung J; Thomas KV; Mueller JF; Tscharke BJ, 2026, 'Cannabis consumption in Australia 2018–2025: Socio-economic and regional trends from wastewater and survey data', Addiction, 121, pp. 861 - 869, http://dx.doi.org/10.1111/add.70277

Wilson J; Dobson O; Langcake A; Mishra P; Bryant Z; Leung J; Dawson D; Graham M; Teesson M; Freeman TP; Hall W; Chan GCK; Stockings E, 2026, 'The efficacy and safety of cannabinoids for the treatment of mental disorders and substance use disorders: a systematic review and meta-analysis', Lancet Psychiatry, 13, pp. 304 - 315, http://dx.doi.org/10.1016/S2215-0366(26)00015-5

Chung J; Lim CCW; Leung J; Stjepanovic D; Chiu V; Hides L; Connor JP; Hall W; Chan GCK, 2026, 'Cannabis Vaping in Youth: A Systematic Review and MetaAnalysis of Risk Factors in Adolescents and Young Adults', Journal of Studies on Alcohol and Drugs, 87, pp. 249 - 273, http://dx.doi.org/10.15288/jsad.24-00464

Dawson D; Lim C; Leung J; Lorenzetti V; Gray A; Hall W; Stjepanović D, 2026, 'Doubtful medical cannabis prescribing practices identified from 55 medical cannabis websites', Australian and New Zealand Journal of Psychiatry, 60, pp. 194 - 196, http://dx.doi.org/10.1177/00048674251396013

Sun T; Chan GCK; Stjepanović D; Yimer T; Vu GT; Lim C; McClure-Thomas C; Russel C; Connor J; Hall W; Hides L; Hammond D; Dietrich T; Erku D; Johnson B; Leung J, 2026, 'Co-Designing AI-Generated Vaping Awareness Materials With Adolescents and Young Adults: A Qualitative Study', Drug and Alcohol Review, 45, http://dx.doi.org/10.1111/dar.70022

Siste K; Leung J; Murtani BJ; Sen LT; Kusuma KS; Hanafi E; Nainggolan FD; Aryani A; Tan C; Lubis A; Murni A, 2026, 'Feasibility and tolerability of group cognitive behavioral therapy on improving functioning and managing craving and psychosocial factors among incarcerated women with methamphetamine use disorder', Irish Journal of Psychological Medicine, http://dx.doi.org/10.1017/ipm.2026.10190

Leung J; Johnson B; Saunders JB; Stjepanovic D; Patel VY; McClure-Thomas C; Connor JP; Kai Chan GC, 2026, 'Game related over-spending across age groups and its association with gaming disorder', Addictive Behaviors, 172, http://dx.doi.org/10.1016/j.addbeh.2025.108490

Johnson B; Parker S; Hall W; Leung J; Chan G, 2026, 'General practitioner management of adult ADHD: Challenges and implications', Australasian Psychiatry, http://dx.doi.org/10.1177/10398562261502219

Johnson B; Yang T; Stjepanović D; Sun T; Chan G; Leung J, 2026, 'General-Purpose Artificial Intelligence Use in Routine Mental Health Practice Among Australian Clinicians: Mixed Methods Study', Journal of Medical Internet Research, 28, http://dx.doi.org/10.2196/101629

Leung J; Johnson B; McRae K; Fong S; Gonzalez PC; Mcclure-Thomas C; Sun T; Kern N; Wong YM; Liu R; Chan GCK, 2026, 'Generative Large Language Models in Mental Health Care Settings: Systematic Review and Meta-Analysis', Jmir AI, 5, http://dx.doi.org/10.2196/87730

Dawson D; Stjepanović D; McClure-Thomas C; Lorenzetti V; Hall W; Sun T; Leung J, 2026, 'Motivations and Pathways: A Thematic Analysis of Interviews with Medicinal Cannabis Consumers in Australia', Substance Use and Misuse, 61, pp. 638 - 642, http://dx.doi.org/10.1080/10826084.2025.2560074

Leung J; Stjepanović D; Chan GCK; Hall WD; Dawson D, 2026, 'Proportions and correlates of high-risk cannabis use in Australia—A cross-sectional analysis of the 2022–2023 National Drug Strategy Household Survey', Addiction, http://dx.doi.org/10.1111/add.70383

Leung J; Stjepanovic D; Fong S; Dawson D; Vu G; Yimer T; McClure-Thomas C; Hall WD; Chan GCK, 2026, 'The psychometric properties of validated tools to assess cannabis use disorder: A systematic review and meta-analysis', Addiction, http://dx.doi.org/10.1111/add.70438

Chan GCK; Stjepanović D; Saunders JB; Fong S; Kaag AM; Long J; McClure-Thomas C; Siste K; van den Brink W; Widdershoven P; Zhao M; Zhong N; Leung J, 2026, 'Validating the Gaming Disorder Identification Test in English, Chinese, Dutch and Indonesian', Addiction, http://dx.doi.org/10.1111/add.70602

Wilson J; Langcake A; Bryant Z; Freeman TP; Leung J; Chan GCK; Englund A; Graham M; Stockings E, 2025, 'The safety and efficacy of cannabinoids for the treatment of mental health and substance use disorders: protocol for a systematic review and meta-analysis', Systematic Reviews, 14, http://dx.doi.org/10.1186/s13643-024-02657-3

Vu GT; Sun T; Hall W; Connor JP; Thai P; Gartner C; Leung J; Chan G, 2025, 'Trends in Social Norms Toward Cigarette Smoking and E-cigarette Use Among U.S. Youth Between 2015 and 2021', Nicotine and Tobacco Research, 27, pp. 2168 - 2176, http://dx.doi.org/10.1093/ntr/ntaf120

Sun T; Chan G; Gravely S; Quah ACK; Meng G; Fong GT; Xu SS; Katanoda K; Seo HG; Tabuchi T; Yoshimi I; Kang CB; Vu G; Cho A; Lim C; Togawa K; Lim S; Lee S; Cho SI; Kim GY; Leung J, 2025, 'Knowledge and Concerns About Smoking-Related Health Risks: A Cross-Sectional Analysis of the 2021 International Tobacco Control Japan and Korea Surveys', Drug and Alcohol Review, 44, pp. 2127 - 2137, http://dx.doi.org/10.1111/dar.70043

Kerr JA; Husin HM; Leung J; Dashti SG; Degenhardt L; Ellul S; Spry EA; Sawyer SM; Campbell G; Hall WD; Yimer TM; Chan GCK; Patton GC; Olsson CA, 2025, 'The natural history of DSM-5 alcohol-use disorder from late adolescence to middle adulthood in Australia: a prospective cohort study', Lancet Public Health, 10, pp. e923 - e932, http://dx.doi.org/10.1016/S2468-2667(25)00225-7

Yimer TM; Chan GCK; Stjepanović D; Sun T; Shin D; Lucey M; Choi J; Saunders JB; Connor JP; Leung J, 2025, 'The Short-Term Health Effects of Dealcoholised Red Wine: A Systematic Review and Meta-Analysis', Drug and Alcohol Review, 44, pp. 2091 - 2105, http://dx.doi.org/10.1111/dar.70047

Widati S; Sebayang SK; Nurmala I; Muthmainnah ; Artanti KD; Hera NA; Fajrinmuha R; Leung J; Lim C; McClure-Thomas C; Fausiah F; Farassania G, 2025, 'Communicating Smoke-Free Messages to Children and Women in Rural and Urban Indonesia', Media Publikasi Promosi Kesehatan Indonesia, 8, pp. 1106 - 1115, http://dx.doi.org/10.56338/mppki.v8i10.8056

Tisdale C; Leung J; de Andrade D; Hides L, 2025, 'Investigating the Critical Period for Alcohol or Other Drug-Related Presentations Following Access to Residential Substance Use Treatment: a Data Linkage Study', International Journal of Mental Health and Addiction, 23, pp. 2621 - 2649, http://dx.doi.org/10.1007/s11469-024-01248-6

Gardner LA; Newton NC; Rowe AL; O'Dean S; Teesson M; Hides L; McBride N; Sunderland M; Freeman B; Egan L; Hawkins A; Ellem R; Catakovic A; Caradmone E; Alcorn C; Blackburn K; East J; Thornton L; Stapinski L; Birrell L; Lee YY; Mihalopoulos C; Leung J; McRobbie H; Lee N; Allsop S; Champion KE; Stockings E, 2025, 'The OurFutures Vaping eHealth intervention to prevent e-cigarette use among adolescent students in Australia: a cluster randomised controlled trial', Lancet Public Health, 10, pp. e682 - e692, http://dx.doi.org/10.1016/S2468-2667(25)00145-8

Leung J; Ellem R; Glasgow S; Rowe AL; Gardner L; Davidson L; Campbell G; Pocuca N; Tisdale C; Chan G; Hides L, 2025, 'The Use and Knowledge Around Vaping and Their Correlates Among University Students—A Cross-sectional Australian Study', International Journal of Mental Health and Addiction, 23, pp. 3105 - 3121, http://dx.doi.org/10.1007/s11469-024-01281-5

Leung J; Sun T; Stjepanović D; Vu G; Yimer T; Connor JP; Hall W; Chan GCK, 2025, 'Generative Artificial Intelligence With Youth Codesign to Create Vaping Awareness Advertisements', JAMA Network Open, 8, http://dx.doi.org/10.1001/jamanetworkopen.2025.14040

Dawson D; Chan G; Stjepanović D; Lorenzetti V; Hall WD; Leung J, 2025, 'The prevalence and correlates of self-reported cannabis use for medicinal, dual and recreational motives in Australia: Findings from the National Drug Strategy Household Survey 2022/2023', Drug and Alcohol Review, 44, pp. 1351 - 1364, http://dx.doi.org/10.1111/dar.14062

Johnson B; Sun T; Wu L; Seal S; Stjepanovic D; Chan G; Leung J, 2025, 'Content Analysis of the Portrayal of Prescription Stimulants on TikTok', Journal of Attention Disorders, 29, pp. 617 - 627, http://dx.doi.org/10.1177/10870547251318834

Belete H; Mekonen T; Connor JP; Chan G; Hides L; Leung J, 2025, 'Tobacco smoking in Sub-Saharan Africa: A systematic review and meta-analysis', Drug and Alcohol Review, 44, pp. 1079 - 1091, http://dx.doi.org/10.1111/dar.14040

Chan GCK; He E; Leung J; Verspoor K, 2025, 'A comprehensive systematic review dataset is a rich resource for training and evaluation of AI systems for title and abstract screening', Research Synthesis Methods, 16, pp. 308 - 322, http://dx.doi.org/10.1017/rsm.2025.1

Leung J; Tisdale C; Choi J; Ellem R; Davidson L; Chan GCK; White MJ; Kavanagh DJ; Quinn C; Hides L, 2025, 'E-Cigarette Use Among High School Students—a Cross-Sectional Study of Associated Risk Factors for the Use of Flavour-Only and Nicotine Vapes', International Journal of Mental Health and Addiction, 23, pp. 236 - 250, http://dx.doi.org/10.1007/s11469-023-01099-7

Tisdale C; Leung J; de Andrade D; Hides L, 2025, 'What Client Demographic, Substance Use, Mental Health, Treatment, and Psychological Variables Predict Residential Treatment Completion for Substance Use Disorders?', International Journal of Mental Health and Addiction, 23, pp. 49 - 69, http://dx.doi.org/10.1007/s11469-022-01002-w

Johnson B; Stjepanovic D; Leung J; Chan GCK, 2025, '“Everything’s a Challenge”: An Interview Study of ADHD Individuals in the Midst of the Prescription Stimulant Shortage', Journal of Attention Disorders, 29, pp. 120 - 127, http://dx.doi.org/10.1177/10870547241288351

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