Associate Professor Gary Chung Kai Chan
Associate Professor

Gary Chung Kai Chan

Email: 
Phone: 
+61 7 344 32533

Background

Dr. Gary Chan is a NHMRC Emerging Leadership Fellow at the National Centre for Youth Substance Use Research. His principal research interest lies in the field of substance misuse prevention and the application of cutting-edge statistical method for longitudinal analysis and causal inference. He was awarded over $13m funding as chief investigator and has over 200 publications. His recent research focuses on addiction epidemiology, including vaping, cannabis use, and behavioral addiction such as gaming disorder. He collaborates extensively with leading researchers in major national and international institutes, including the University of Washington, Murdoch Children's Research Institute, University of Melbourne, and University College London. He has also served as a consultant at the United Nations Office of Drugs and Crime to improve exisitng methods for monitoring global trends of illicit substance production, trafficking and use. This work has made significant impact on how global data will be collected, and these new data will be used by the United nations and many national governments to inform drug policy decision making. He is a Deputy Statistical and Methodology Editor for the journal Addiction.

Availability

Associate Professor Gary Chung Kai Chan is:
Available for supervision
Media expert

Fields of research

Biomedical and Clinical Sciences Biostatistics Epidemiology Health Sciences Mathematical Sciences Psychology Statistics

Qualifications

  • Bachelor of Arts, The University of Queensland
  • Bachelor of Science, The University of Queensland
  • Masters (Coursework) of Science, The University of Queensland
  • Doctor of Philosophy, The University of Queensland

Search Professor Gary Chung Kai Chan’s works on UQ eSpace

267 works between 1992 and 2027
All (267) Journal Article (223) Other Outputs (5) Conference Publication (38) Book Chapter (1)

1 - 20 of 267 works

2027

Journal Article

Attentional bias to cannabis stimuli in people with cannabis use disorder

Quinones-Valera, Marianna, Fraser, Madeleine I., Solowij, Nadia, Verdejo-Garcia, Antonio, Cousijn, Janna, Abbott, Gabrielle, Dunsford, Suraya, Paloubis, Anastasia, McTavish, Eugene, Ramamurthy, Jessica R., Jones, Andrew, Chan, Gary, Greenwood, Lisa, Manning, Victoria and Lorenzetti, Valentina (2026). Attentional bias to cannabis stimuli in people with cannabis use disorder. Addictive Behaviors, 184 108838, 108838. doi: 10.1016/j.addbeh.2026.108838

Attentional bias to cannabis stimuli in people with cannabis use disorder

2026

Journal Article

Authors’ Reply: Same Name, Moving Target: Model Version Drift in Syntheses of Large Language Models for Mental Health

Johnson, Benjamin, Leung, Janni and Chan, Gary Chung Kai (2026). Authors’ Reply: Same Name, Moving Target: Model Version Drift in Syntheses of Large Language Models for Mental Health. JMIR AI, 5 v5i1e112028, e112028-e112028. doi: 10.2196/112028

Authors’ Reply: Same Name, Moving Target: Model Version Drift in Syntheses of Large Language Models for Mental Health

2026

Journal Article

Anticipated behavioural responses to potential regulatory actions to reduce nicotine in cigarettes to non-addictive levels: cross-sectional findings from the 2020 and 2022 ITC Smoking and Vaping Survey in Australia, Canada, England and the USA

Morphett, Kylie, Cho, Ara, Gravely, Shannon, Borland, Ron, East, Katherine A, Cummings, Michael, Chan, Gary, Smith, Tracy T, Hyland, Andrew, Fong, Geoffrey T, Kang, Heewon and Gartner, Coral E (2026). Anticipated behavioural responses to potential regulatory actions to reduce nicotine in cigarettes to non-addictive levels: cross-sectional findings from the 2020 and 2022 ITC Smoking and Vaping Survey in Australia, Canada, England and the USA. Tobacco Control, tc-2025. doi: 10.1136/tc-2025-060036

Anticipated behavioural responses to potential regulatory actions to reduce nicotine in cigarettes to non-addictive levels: cross-sectional findings from the 2020 and 2022 ITC Smoking and Vaping Survey in Australia, Canada, England and the USA

2026

Journal Article

Correction to: The gaming disorder identification test (GADIT) - A screening tool for gaming disorder based on ICD-11

Chan, Gary C. K., Saunders, John B., Stjepanović, Daniel, McClure-Thomas, Caitlin, Connor, Jason, Hides, Leanne, Wood, Andrew, King, Daniel, Siste, Kristiana, Gullo, Matthew, Long, Jiang and Leung, Janni K. (2026). Correction to: The gaming disorder identification test (GADIT) - A screening tool for gaming disorder based on ICD-11. Journal of Behavioral Addictions, 15 (3), 1171-1172. doi: 10.1556/2006.2024.11138

Correction to: The gaming disorder identification test (GADIT) - A screening tool for gaming disorder based on ICD-11

2026

Journal Article

Alcohol’s harm to others among adults in Australia: findings from the 2022–2023 national drug and health household survey

Vu, Giang T., Valeria, Alysia, Johnson, Ben, Connor, Jason, Chan, Gary and Leung, Janni (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 105444, 105444-105444. doi: 10.1016/j.drugpo.2026.105444

Alcohol’s harm to others among adults in Australia: findings from the 2022–2023 national drug and health household survey

2026

Journal Article

Validating the Gaming Disorder Identification Test in English, Chinese, Dutch and Indonesian

Chan, Gary Chung Kai, Stjepanović, Daniel, Saunders, John B., Fong, Stephanie, Kaag, Anne Marije, Long, Jiang, McClure‐Thomas, Caitlin, Siste, Kristiana, van den Brink, Wim, Widdershoven, Pim, Zhao, Min, Zhong, Na and Leung, Janni (2026). Validating the Gaming Disorder Identification Test in English, Chinese, Dutch and Indonesian. Addiction add.70602. doi: 10.1111/add.70602

Validating the Gaming Disorder Identification Test in English, Chinese, Dutch and Indonesian

2026

Journal Article

Sociodemographic trends in daily, weekly and less than weekly cannabis use in Australia

Leung, Janni, Chan, Gary Chung Kai, Zhang, Ruofan, Hall, Wayne D. and McClure‐Thomas, Caitlin (2026). Sociodemographic trends in daily, weekly and less than weekly cannabis use in Australia. Drug and Alcohol Review, 45 (6) e70207. doi: 10.1111/dar.70207

Sociodemographic trends in daily, weekly and less than weekly cannabis use in Australia

2026

Journal Article

Generative large language models in mental health care settings: Systematic review and meta-analysis

Leung, Janni, Johnson, Benjamin, McRae, Kelsey, Fong, Stephanie, Gonzalez, Paula Cardona, McClure-Thomas, Caitlin, Sun, Tianze, Kern, Naomi, Wong, Yuen Ming, Liu, Richard and Chan, Gary Chung Kai (2026). Generative Large Language Models in Mental Health Care Settings: Systematic Review and Meta-Analysis. JMIR AI, 5 v5i2e87730, e87730-e87730. doi: 10.2196/87730

Generative large language models in mental health care settings: Systematic review and meta-analysis

2026

Journal Article

Confusing Uncertainty With Bias: The Challenges of Working With Real‐World Data

Wilson, Jack, Sunderland, Matthew, O'Dean, Siobhan, Slade, Tim, Dawson, Danielle, Dobson, Olivia, Leung, Janni, Chan, Gary, Teesson, Maree, Hall, Wayne, Newton, Nicola, Lorenzetti, Valentina and Stockings, Emily (2026). Confusing Uncertainty With Bias: The Challenges of Working With Real‐World Data. Drug and Alcohol Review, 45 (6) e70242, e70242-e70242. doi: 10.1111/dar.70242

Confusing Uncertainty With Bias: The Challenges of Working With Real‐World Data

2026

Journal Article

Financial harms of regular gaming: Cross-national evidence from the international gaming survey

Johnson, Benjamin, Kai Chan, Gary Chung, Saunders, John B., Stjepanović, Daniel, van den Brink, Wim, McClure-Thomas, Caitlin, Long, Jiang, Siste, Kristiana, Zhao, Min, Zhong, Na, Widdershoven, Pim, Kaag, Anne Marije and Leung, Janni (2026). Financial harms of regular gaming: Cross-national evidence from the international gaming survey. Journal of Behavioral Addictions. doi: 10.1556/2006.2026.00092

Financial harms of regular gaming: Cross-national evidence from the international gaming survey

2026

Journal Article

Age period cohort trends in alcohol treatment episodes across Australia from 2003 to 2022

Yuen, Wing See, Miller, Mia, Man, Nicola, Livingston, Michael, Chrzanowska, Agata, Clare, Philip, Akhurst, Jane, Tierney, Louise, Da Silva, Kristina, Blakey, Parker, Bryant, Willow, Chan, Gary, Leung, Janni and Peacock, Amy (2026). Age period cohort trends in alcohol treatment episodes across Australia from 2003 to 2022. Addiction, 121 (8), 2154-2165. doi: 10.1111/add.70450

Age period cohort trends in alcohol treatment episodes across Australia from 2003 to 2022

2026

Journal Article

Efficacy and safety of cannabinoids – Authors’ reply

Wilson, Jack, Dobson, Olivia, Langcake, Andrew, Mishra, Palkesh, Bryant, Zachary, Leung, Janni, Dawson, Danielle, Graham, Myfanwy, Teesson, Maree, Freeman, Tom P, Hall, Wayne, Chan, Gary C K and Stockings, Emily (2026). Efficacy and safety of cannabinoids – Authors’ reply. The Lancet Psychiatry, 13 (8), 642-643. doi: 10.1016/S2215-0366(26)00198-7

Efficacy and safety of cannabinoids – Authors’ reply

2026

Journal Article

Self-reported reasons for medical and nonmedical cannabis use in Australia: a cross-sectional analysis of the International Cannabis Policy Study 2023

Dawson, Danielle, Stjepanovic, Daniel, Leung, Janni, Lim, Carmen, Hall, Wayne, Lorenzetti, Valentina, Chan, Gary and Hammond, David (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 113124, 1-8. doi: 10.1016/j.drugalcdep.2026.113124

Self-reported reasons for medical and nonmedical cannabis use in Australia: a cross-sectional analysis of the International Cannabis Policy Study 2023

2026

Journal Article

A systematic review and meta-analysis of self-reported exposure to cannabis advertising and its association with cannabis use and intentions

McClure-Thomas, Caitlin, Yimer, Tesfa, Strong, Caroline, Sun, Tianze, Hall, Wayne D., Chan, Gary Chung Kai, Connor, Jason P. and Leung, Janni (2026). A systematic review and meta-analysis of self-reported exposure to cannabis advertising and its association with cannabis use and intentions. Addiction, 121 (6), 1343-1361. doi: 10.1111/add.70310

A systematic review and meta-analysis of self-reported exposure to cannabis advertising and its association with cannabis use and intentions

2026

Journal Article

Interventions for smoking cessation in people undergoing lung cancer screening

Marshall, Henry M., Bendotti, Hollie, Morphett, Kylie, Harrison, Nathan J., Waldmann, Jana Y., Chan, Gary, Fidler, Anne, Allerton, Stacey, Runge, Catherine, Brooke, Mark, Lawler, Sheleigh, Gartner, Coral E., Yang, Ian A. and Fong, Kwun (2026). Interventions for smoking cessation in people undergoing lung cancer screening. Cochrane Database of Systematic Reviews, 2026 (5) CD016184, 1-11. doi: 10.1002/14651858.cd016184

Interventions for smoking cessation in people undergoing lung cancer screening

2026

Journal Article

General-purpose artificial intelligence use in routine mental health practice among Australian clinicians: A mixed methods study

Johnson, Benjamin, Yang, Tingting, Stjepanovic, Daniel, Sun, Tianze, Chan, Gary and Leung, Janni (2026). General-Purpose Artificial Intelligence Use in Routine Mental Health Practice Among Australian Clinicians: A Mixed Methods Study (Preprint). Journal of Medical Internet Research, 28 v28i9e101629, e101629-e101629. doi: 10.2196/101629

General-purpose artificial intelligence use in routine mental health practice among Australian clinicians: A mixed methods study

2026

Journal Article

Non‐medical use of prescription stimulants in Australia: Prevalence, sociodemographic and substance use correlates from the 2022–2023 National Drug Strategy Household Survey

Johnson, Benjamin, Chan, Gary, Connor, Jason, Stjepanovic, Daniel, Leung, Janni and Sun, Tianze (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 (4) e70168, 1-14. doi: 10.1111/dar.70168

Non‐medical use of prescription stimulants in Australia: Prevalence, sociodemographic and substance use correlates from the 2022–2023 National Drug Strategy Household Survey

2026

Journal Article

The psychometric properties of validated tools to assess cannabis use disorder: A systematic review and meta‐analysis

Leung, Janni, Stjepanovic, Daniel, Fong, Stephanie, Dawson, Dani, Vu, Giang, Yimer, Tesfa, McClure‐Thomas, Caitlin, Hall, Wayne Denis and Chan, Gary Chung Kai (2026). The psychometric properties of validated tools to assess cannabis use disorder: A systematic review and meta‐analysis. Addiction add.70438. doi: 10.1111/add.70438

The psychometric properties of validated tools to assess cannabis use disorder: A systematic review and meta‐analysis

2026

Journal Article

Proportions and correlates of high-risk cannabis use in Australia-A cross-sectional analysis of the 2022-2023 National Drug Strategy Household Survey

Leung, Janni, Stjepanovic, Daniel, Chan, Gary Chung Kai, Hall, Wayne Denis and Dawson, Danielle (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 add.70383. doi: 10.1111/add.70383

Proportions and correlates of high-risk cannabis use in Australia-A cross-sectional analysis of the 2022-2023 National Drug Strategy Household Survey

2026

Journal Article

Social cognition in young adults who endorse a cannabis use disorder

Abbott, Gabrielle, Greenwood, Lisa-Marie, Bartschi, Jessica G., Dunsford, Suraya, Goodwin, Isabella, Paloubis, Anastasia, Quinones-Valera, Marianna, McTavish, Eugene, Verdejo-Garcia, Antonio, Cousijn, Janna, Chan, Gary C. K., Solowij, Nadia and Lorenzetti, Valentina (2026). Social cognition in young adults who endorse a cannabis use disorder. Psychopharmacology, 243 (4), 861-871. doi: 10.1007/s00213-025-06890-z

Social cognition in young adults who endorse a cannabis use disorder

Current funding

  • 2026 - 2027
    Navigating the cannabis policy crossroads: Global lessons for protecting Queensland youth
    Queensland Mental Health Commission
    Open grant
  • 2025 - 2029
    Unleashing the power of AI: Supercharging social media campaigns against youth vaping
    NHMRC Investigator Grants
    Open grant
  • 2024 - 2029
    Implementation, Effectiveness and Sustainability of a Co-designed Value-based Brief Intervention Model of Healthcare in Alcohol and Other Drug Services
    NHMRC Partnership Projects
    Open grant
  • 2024 - 2029
    Unclouding the future: Igniting change with an AI-powered social media campaign against youth vaping
    NHMRC MRFF PPHR - Maternal Health and Healthy Lifestyles
    Open grant
  • 2023 - 2028
    The Interdisciplinary Tobacco Endgame Research Network (INTER-Net)
    NHMRC Synergy Grants
    Open grant
  • 2022 - 2028
    Centre of Research Excellence in Alcohol and Other Drug sector capacity building for outcome focused, evidence based and cost effective care (CRE in AOD -CB)
    NHMRC Centres of Research Excellence
    Open grant

Past funding

  • 2024 - 2026
    BALANCE: Promoting wellBeing in AdoLescent and young Adult caNCEr survivors (NHMRC Partnership Grant led by Griffith Uni)
    Griffith University
    Open grant
  • 2023 - 2024
    Establishing an International Consortium on video gaming addiction
    U21 Health Sciences Group International Projects Fund
    Open grant
  • 2023
    Review of alcohol and other drugs program
    Queensland Department of Education
    Open grant
  • 2023
    How can we minimise the adolescent uptake of vaping and related social and health harm?
    Academy of the Social Sciences in Australia
    Open grant
  • 2022 - 2023
    Causal inference with observational data in addiction research
    Australian Prevention Partnership Centre Administered by The Sax Institute
    Open grant
  • 2022
    Cannabis - A joyful treat or devil's fruit?
    UQ Foundation Research Excellence Awards
    Open grant
  • 2021 - 2024
    BALANCE: Promoting wellBeing in AdoLescent and young Adult cancer survivors
    NHMRC Partnership Projects
    Open grant
  • 2020 - 2024
    E-cigarettes and vaping: Holy grail of tobacco control or gateway to a public health disaster?
    NHMRC Investigator Grants
    Open grant
  • 2017 - 2018
    Informing future policies on cannabis in Australia. Lessons from new trends in the USA and from the history of tobacco control.
    UQ Early Career Researcher
    Open grant
  • 2016 - 2019
    Pathways to multiple substance use: informing the next generation of prevention science
    UQ Fellowships
    Open grant

Availability

Associate Professor Gary Chung Kai Chan is:
Available for supervision

Looking for a supervisor? Read our advice on how to choose a supervisor.

Available projects

  • Electronic cigarettes use among young people - risks factors for its initiation and escalation, impact on mental health, and its effect on smoking cessation

    Electronic cigarettes and personal vaporisors have been gaining popularity in many developed countries such as the US, Canada and the UK. It has been promoted as a cessation device for smokers, thus it holds the potential to reduce smoking related burden on the society. However, it also raises concerns that its uptake among young people may renormalise cigarette smoking. This projects will evaluate the overall evidences of its benefit and harms on public health.

  • Understanding initiation, escalation and remission of substance use from adolescence to mid-adulthood: A life course approach

    It is well known that adolescence is a period of experiementation and many adolescents may experience with illicit substance during this period. While many of them do not progress into problematic use (e.g. abuse and dependence), some have escalated their use during their 20s and maintained their habits into 30s and 40s. This project will take a life course approach to understand risk factors for substance initiation and escalation, and factors that are linked to natural remission of substance us in mid-adulthood.

  • The benefits and harms of Gaming

    With the proliferation of handheld devices, video gaming has penstrated nearly every corner of the world and every age groups. This project will focus on quantifying the benefit of gaming, such as increased connectivity with friends in the virtual world and overcoming loneliness during difficult time (e.g., COVID lockdown), and the potential harms such as addiction.

Supervision history

Current supervision

Completed supervision

Enquiries

Contact Associate Professor Gary Chung Kai Chan directly for media enquiries about:

  • alcohol
  • cannabis
  • e-cigarette
  • smoking
  • Substance use
  • tobacco
  • vaping
  • Video gaming

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