Publications

McDonald, A*., Doggett, A., Bondy, S., Colman, I., Cooke, S., Hamilton, H., Kurdyak, P., Leatherdale, S., Myran, D., Trehm, J., Wickens, C., MacKillop, J. [co-senior], Halladay, J. [co-senior]. (Accepted 2025). Adolescent cannabis use and mental health problems from 2013 to 2023: A population-based study. Addiction.

Halladay, J., Ji, C., Georgiades, K., McDonald, A.*., Chapman, C., Sunderland, M., Slade, T., MacKillop, J. (Accepted 2025). Changes in Cross-Sectional Associations between Cannabis Use and Depression, Anxiety, and Suicidality in a Nationally Representative Sample of Canadian Adults from 2012 to 2022. Canadian Journal of Psychiatry.

Duncan, L. [co-first author], Halladay, J. [co-first author], Bennett, T., Boylan, K., Chang, F., Cometto, J., Craig, S., Demaiter, Z., Duku, E., Edwards, J., Ferro, M., Georgiades, K., Gonzalez, A., Kimber, M., Krasevich, K., McTaggart, J., Pires, P., Plamondon, A., Rosic, T., Sassi, R., Dhariwal, T., Zhao, J., Lipman, E.L. (2025). Evaluation of the Ontario Child Health Study Emotional Behavioural Scales (OCHS-EBS) in Children and Youth from an Outpatient Mental Health Setting. Psychiatry Research. Online ahead of print: https://doi.org/10.1016/j.psychres.2025.116809

Acuff, S. F., Belisario, K. L., Cole, H. E., Dennhardt, A. A., Halladay, J. E., Tucker, J. A., Amlung, M., MacKillop, J., Murphy, J. G. (2025 in press). Comparing Behavioral Economic and Internalizing Symptom Predictors of Drinking Trajectories over Three Years During Emerging Adulthood. Journal of Psychopathology and Clinical Science. https://doi.org/10.1037/abn0001077

Halladay, J., Belisario, K., McDonald, A.*, Acuff, S., Doggett, A., Garber, M., Maxwell, A., Murphy, J., MacKillop, J. (2025). Examining bidirectional associations between cannabis use and internalizing symptoms among high-risk emerging adults: A prospective cohort study. Psychological Medicine. 55 (2025): e291. https://doi.org/10.1017/S0033291725101700

Halladay, J., Sunderland, M., Butt, M., Duncan, L. (2025). Health measurement properties: What you need to know about reliability and validity. Evidence Based Nursing: Research Made Simple. https://doi.org/10.1136/ebnurs-2025-104420

Varley, D., Henry, A., Halladay, J., Baillie, A., Keyes, K., Slade, T., Chapman, C., O’Dean, S., Visontay, R., Mewton, L., Newton, N., Teesson, M., Sunderland, M. (2025). Identifying Psychological Distress Data Available in Nationally Representative Surveys: A Scoping Review and Case Study of Australian Surveys. Social Psychiatry & Psychiatric Epidemiology. https://doi.org/10.1007/s00127-025-02981-6

Sainsbury, K.*, Jibb, L., Uliaszek, A., Halladay, J., Cleverley, K. (2025). Students’ Experiences with School Reintegration After Psychiatric Hospitalization: A Scoping Review. European Child & Adolescent Psychiatry. http://dx.doi.org/10.1007/s00787-025-02813-7

Bruce, E., Halladay, J., Pathiranawasam, S.*, Munn, C. (2025). Co-Designing, Implementing, and Evaluating the Acceptability of a Virtual Graduate Teaching Assistant Mental Health Literacy Program on a University Campus. Mental Health & Prevention. https://doi.org/10.1016/j.mhp.2025.200433

Nguyen, A., Grummitt, L., Barrett, E. L., Bailey, S., Gardner, L. A., Champion, K. E., Halladay, J., Maratos, F., Hunter, E., Rowlinson, K., Chapman, C., Newton, N. C., Birrell, L. (2025). The relationship between emotion regulation and mental health in adolescents: Self-compassion as a moderator. Mental Health & Prevention. https://doi.org/10.1016/j.mhp.2025.200430

Halladay, J., Syan, S., Mote, E., Eskandarian, S., Rahman, L., Stead, V., Peixoto, B., MacKillop, E., Fedchenko, C., Hastings, P., Cowie, K., McCarron, C., MacKillop, J. (2025). Iterative development and clinical outcomes of an outpatient Young Adult Substance Use Program. Psychology of Addictive Behaviors. https://doi.org/10.1037/adb0001078

Halladay, J., Visontay, R., Sunderland, M., Rowe, A., Devine, E., Smout, S., Stockings, E., Andrews, J. L., Champion, K., Gardner, L., Newton, N., Teesson, M., Slade, T. (2025). Exploring a diverse set of specifications related to associations between adolescent smoking, vaping, and emotional problems: a multiverse analysis. Addictive Behaviors. https://doi.org/10.1016/j.addbeh.2025.108380

McDonald, A.*, Doggett, A., Belisario, K., Gillard, J., De Jesus, J., Vandehei, E., Lee, L., Halladay, J., MacKillop, J. (2025). Cannabis Use and Misuse Following Recreational Cannabis Legalization. JAMA Network Open. doi:10.1001/jamanetworkopen.2025.6551

McDonald, A.* [equal 1st], Cooper, A. [equal 1st], Doggett, A., Halladay, J., Belisario, K., MacKillop, J. (2025). Association of recreational cannabis legalization with changes in medical, illegal, and total cannabis expenditures in Canada. International Journal of Drug Policy. https://doi.org/10.1016/j.drugpo.2025.104793

Halladay, J., Kershaw, S., Devine, E., Grummitt, L., Visontay, R., Lynch, S., Ji, C., Scott, L., Bower, M., Mewton, L., Sunderland, M. [co-senior], Slade, T. [co-senior]. (2025) Covariates in studies examining longitudinal relationships between substance use and mental health problems among youth: A meta-epidemiologic review. Drug and Alcohol Dependence. https://doi.org/10.1016/j.drugalcdep.2025.112665

 Sunderland, M., Halladay, J., Chapman, C. (2025). Measuring distress in the presence of substance use: A differential item functioning analysis of the Kessler 10 psychological distress scale. Journal of Psychopathology and Behavioral Assessment. https://doi.org/10.1007/s10862-024-10181-w

Halladay, J., Sunderland, M., Newton, N., Lynch, S., Chapman, C., Stapinski, L., Andrews, J.L., Birrell, L., Teesson, M., Slade, T. (2024). Do school-based prevention programs impact co-occurring alcohol use and psychological distress during adolescence? Psychological Medicine. https://doi.org/10.1017/S0033291724002897

Halladay, J., Visontay, R., Slade, T., Devine, E., Smout, S., Andrews, J. L., Champion, K., Teesson, M., Sunderland, M. (2024). Across the multiverse: Exploring a diverse set of specifications related to cross-sectional and prospective associations between adolescent alcohol use and emotional problems. Psychological Medicine. https://doi.org/10.1017/S0033291724002502

De Rubeis, V., Repchuck, R., Halladay, J., Thabane, L., Georgiades, K. (2024). Examining associations between teacher distress and student mental health outcomes: Evidence from the School Mental Health Survey. BMC Psychology. https://doi.org/10.1186/s40359-024-02071-3 

Yang, M., Zhang, P., Halladay, J., Zou, K., Choonara, I., Ji, X., Zhang, S., Yan, W., Huang, L., Lu, X., Wang, H., Jiang, Y., Liu, X., Zeng, L., Zhang, L.*, Guyatt, G. (2024). Patient-reported outcome measures for medication treatment satisfaction: A systematic review of measure development and measurement properties. BMC Medicine. https://doi.org/10.1186/s12916-024-03560-3

Boamah, S., Olarte-Godoy, J., Jack, S., Root, F., Halladay, J. Past the tipping point: Understanding and addressing burnout among nursing students. (2024). Nurse Education Today. https://doi.org/10.1016/j.nedt.2024.106319

Smout, S., Champion, K.E., O’Dean, S. Halladay, J., Gardner, L.A., [joint senior] Newton, N.C. [joint senior]. (2024). Adolescent Lifestyle Behaviour Modification and Mental Health: Longitudinal Changes in Diet, Physical Activity, Sleep, Screen Time, Smoking, and Alcohol Use and Associations with Psychological Distress. International Journal of Mental Health and Addictions. https://doi.org/10.1007/s11469-024-01350-9

Grummitt, L., Bailey, S., Kelly, E., Birrell, L., Gardner, L., Halladay, J., Chapman, C., Andrews, J.L., Champion, K.C., Hunter, E., Egan, L., Conroy, C., Tiko, R., Nguyen, A., Teesson, M., Newton, N., Barrett, E. (2024). Refining the universal, school-based OurFutures Mental Health program to be trauma-informed, gender and sexuality diversity affirmative, and adhere to proportionate universalism: a mixed methods participatory design process. JMIR Pedicatrics and Parenting. https://doi.org/10.2196/54637

Slade, T. [equal 1st], Chapman, C. [equal 1st], Halladay, J., Sunderland, M., Smout, A., Champion, K., Newton, N. [equal senior], Teesson, M. [equal senior] (2024). Diverging trends in alcohol use and mental health in Australian adolescents: A cross-cohort comparison of trends in co-occurrence. Journal of Child Psychology and Psychiatry Advances. https://doi.org/10.1002/jcv2.12241

Halladay, J., Sunderland, M., Chapman, C., Repchuk, R., Georgiades, K., Boak, A., Hamilton, H., Slade, T. (2024). Examining temporal trends in psychological distress and the co-occurrence of common substance use in a population-based sample of grades 7-12 students from 2013-2019. Social Psychiatry and Psychiatric Epidemiology. https://doi.org/10.1007/s00127-024-02619-z

Halladay, J., MacKillop, J., Acuff, S., Amlung, M., Munn, C., Georgiades, K. (2024). Early substance use and the school environment: A multilevel latent class analysis. The Journal of the Canadian Academy of Child and Adolescent Psychiatry. PMID: 38449719

Halladay, J., Sunderland, M., Chapman, C., Teesson, M., Slade, T. (2024). The InterSECT framework: A proposed model for explaining population-level trends in substance use and emotional concerns. American Journal of Epidemiology. https://doi.org/10.1093/aje/kwae013</a

Halladay, J., Ogrodnik, M., *Farag Alla, J., Sunderland, M., Gardner, L., Georgiades, K. (2024). Playing for more than winning: Exploring sports participation, physical activity, and belongingness and their relationship with patterns of adolescent substance use and mental health. Drug and Alcohol Dependence. https://doi.org/10.1016/j.drugalcdep.2023.111039

Grummitt, L., Barrett, E., Halladay, J., Bailey, S., Birrell, L., Hunter, E., Kelly, E., Champion, K.C., Gardner, L., Nguyen, A., Chapman, C., Newton, N., Teesson, M. (2023). Embedding action on social and structural determinants of mental health into a national framework: An “immunisation schedule” for the prevention of common mental disorders. Mental Health & Prevention. https://doi.org/10.1016/j.mhp.2023.200308

Halladay, J., Slade, T., Chapman, C., Mewton, L., O’Dean, S., Visontay, R., Bailie, A., Teesson, M., Sunderland,  M. (2023). Is the association between psychological distress and risky alcohol consumption shifting over time? An age-period-cohort analysis of the Australian population? Psychiatry Research, 115356. https://doi.org/10.1016/j.psychres.2023.115356

Halladay, J., Stead, V., McCarron, C., Kennedy, M., King, K., Venantius, M., Carter, A., Syan, S., Matthews, M., Khoshroo, S., Massey, M., Rahman, L., Burns, J., MacKillop, E., Raymond, H., & MacKillop, J. (2023). Initial insights from a quality improvement initiative to develop an evidence-informed young adult substance use program. The Journal of the Canadian Academy of Child and Adolescent Psychiatry. PMID: 37534112

Halladay, J., Rahman, L., Luvisa, M., Mawson, M., Massey, M., Burns, J., Kennedy, M., King, K., Douglas-Micallef, K., Carter, A., Stead, V., McCarron, C., Khoshroo, S., MacKillop, E., Raymond, H., Younger, L., Punia, K., Venantius, M., Matthews, M., & MacKillop, J. (2023). Measuring and understanding “quality of life” among emerging adults in a substance use program. Psychology of Addictive Behaviours. https://doi.org/10.1037/adb0000926

Grummit, L., Bailey, S., Birrell, L., Kelly, E., Gardner, L., Champion, K., Chapman, C., Andrews, J., Halladay, J., Teesson, M., Newtown, N., Barrett, E. (2023). OurFutures Mental Health: Protocol for a randomised controlled trial of a school-based, universal mental ill-health prevention program. Mental Health & Prevention. https://doi.org/10.1016/j.mhp.2023.200277

Halladay, J., Georgiades, K., MacKillop, J., Lipman, E., Pires, P., & Duncan, L. (2023). Identifying patterns of substance use and mental health concerns among adolescents in an outpatient mental health program using latent profile analysis. European Child & Adolescent Psychiatry. https://doi.org/10.1007/s00787-023-02188-7

Olarte-Godoy, J., Jack, S.M., Campbell, K., Halladay, J., Cleverly, K., McGillion, M., & Links, P. (2022). Psychosocial interventions addressing suicidality in inpatient psychiatry: A scoping review protocol. JBI Evidence synthesis. https://doi.org/10.11124/JBIES-22-00146  

Halladay, J., MacKillop, J., Amlung, M., Munn, C., & Georgiades, K. (2022). Individual- and school-level patterns of substance use and mental health symptoms in a population-based sample of secondary students: A multilevel latent profile analysis. Drug and Alcohol Dependence, 109647. https://doi.org/10.1016/j.drugalcdep.2022.109647 

Halladay, J., *Woock, R., *Xu, A., *Salama Boutros, M., & Munn, C. (2022). Professor Hippo-on-Campus: Developing and Evaluating an Educational Intervention to Build Mental Health Literacy among University Faculty and Staff. Journal of American College Health. https://doi.org/10.1080/07448481.2022.2115305

Halladay, J., Freibott, C.E., Lipson, S.K., Zhou, S., & Eisenberg, D. (2022). Trends in the co-occurrence of substance use and mental health symptomatology in a national sample of US post-secondary students from 2009 to 2019. Journal of American College Health, 1-14. https://doi.org/10.1080/07448481.2022.2098030

Duncan, L., *Smith, S., Wang, L., & Halladay, J. (2022). Development and psychometric evaluation of the Ontario Child Health Study Emotional Behavioural Scales Teacher Version (OCHS-EBS-T): A teacher checklist for dimensional measurement of selected DSM-5 disorders in elementary school-aged children. Psychiatry Research, 312: https://doi.org/10.1016/j.psychres.2022.114574

Minhas, M., Belisario, K., González-Roz, A., Halladay, J., Morris, V., Keough, M., Murphy, J., & MacKillop, J. (2021). Is Talk Cheap? Correspondence between self-attributions about changes in drinking and longitudinal changes in drinking during the COVID-19 pandemic. Alcoholism: Clinical and Experimental Research. https://doi.org/10.1111/acer.14724

Halladay, J., Horricks, L., Amlung, M., MacKillop, J., Munn, C., Nasir, Z., Woock, R.*, & Georgiades, K. (2021). The CAMP study: Feasibility and clinical correlates of standardized assessments of substance use in a youth psychiatric inpatient sample. Child and Adolescent Psychiatry and Mental Health, 14, 48. https://doi.org/10.1186/s13034-021-00403-4

Meenu, M., Belisario, K., González-Roz, A., Halladay, J., Murphy, J., & MacKillop, J. (2021). COVID-19 impacts on drinking and mental health in emerging adults: Longitudinal changes and moderation by economic disruption and sex. Alcoholism: Clinical and Experimental Research, 45(7):1448-1457. https://doi.org/10.1111/acer.14624

Ogrodnik, M., Halladay, J., Fenesi, B., Heisz, J., & Georgiades, K. (2020). Examining associations between physical activity and academic performance in a large sample of Ontario students: The role of inattention and hyperactivity. Journal of Physical Activity and Health, 1-9. https://doi.org/10.1123/jpah.2020-0174

Minhas, M., Oshri, A., Amlung, M., Dennhardt, A., Ferro, M., Halladay, J., Munn, C., Tucker, J., Murphy, J., & MacKillop, J. (2020). Latent profile analysis of heavy episodic drinking in emerging adults: A reinforcer pathology approach. Alcoholism: Clinical and Experimental Research, 44(10), 2130-2140.https://doi.org/10.1111/acer.14438

Halladay, J., *Woock, R., El-Khechen, H., Munn, C., MacKillop, J, Amlung, M., Ogrodnik, M., Favotto, L., Aryal, K., Noori, A., Kiflen, M., & Georgiades, K. (2020). Patterns of substance use among adolescents: A systematic review. Drug and Alcohol Dependence, https://doi.org/10.1016/j.drugalcdep.2020.108222

Halladay, J., Bennett, K., Weist, M., Boyle, M., Manion, I., Campo, M., & Georgiades, K. (2020). Teacher-student relationships and mental health help seeking behaviors among elementary and secondary students in Ontario Canada. Journal of School Psychology, 81, 1-10. https://doi.org/10.1016/j.jsp.2020.05.003

Halladay, J.E., Mackillop, J., Munn, C., Jack, S.M., & Georgiades, K. (2020). Cannabis use as a risk factor for depression, anxiety, and suicidality: Epidemiological associations and implications for nurses. Journal of Addictions Nursing, 31(2), 92-101. https://doi.org/10.1097/jan.0000000000000334

Kim, S., Favotto, L., Halladay, J. et al.(2020). Differential associations between passive and active forms of screen time and adolescent mood and anxiety disorders. Social Psychiatry and Psychiatric Epidemiology, 55(11):1469-1478. https://doi.org/10.1007/s00127-020-01833-9

Vedelago, L., Halladay,, Munn, C., Georgiades, K., & Amlung, M. (2020). Cannabis and the Learning Brain. Frontiers for Young Minds, 8:52. https://doi.org/10.3389/frym.2020.00052

Halladay, J., Scherer, J., MacKillop, J., *Woock, R., Petker, T., Linton, V., & Munn, C. (2019). Brief interventions for cannabis use in emerging adults: A systematic review, meta-analysis, and evidence map. Drug and Alcohol Dependence, 204, 107565. https://doi.org/10.1016/j.drugalcdep.2019.107565

Petker, T.D., Halladay, J., Vedelago, L., Ferro, M. A., Tucker, J., Goldman, M. S., Murphy, J.G., & MacKillop, J. (2019). Predictors of aging out of heavy episodic drinking in emerging adults: A systematic review protocol. Systematic Reviews, 8(1), 230. https://doi.org/10.1186/s13643-019-1139-9

Halladay, J.E., Munn, C., Boyle, M., Jack, S.M., & Georgiades, K. (2019). Temporal changes in the cross-sectional associations between cannabis use, suicidal ideation, and depression in a nationally representative sample of Canadian adults in 2012 compared to 2002. The Canadian Journal of Psychiatry, 65(2):115-123. https://doi.org/10.1177/0706743719854071

Brouwers, M. C., Lavis, J.N., Spithoff, K., Vukmirovic, M., Florez, I.D., Velez, M., Kibria, M., Sekercioglu, N., Kamler, E., Halladay, J., Sandhu, J., Ali, A., Jaffer, A., Kiflen, R., & Pemderton, J. (2019). Assessment of health systems guidance using the Appraisal of Guidelines for Research and Evaluation–Health Systems (AGREE-HS) instrument. Health Policy, 123(7), 646-651. https://doi.org/10.1016/j.healthpol.2019.05.004

Halladay, J., Boyle, M., Munn, C., Jack, S., & Georgiades, K. (2018). Sex differences in the association between cannabis use and psychological distress, depression, and suicidal behaviours among Canadians. Canadian Journal of Psychiatry, 64(5), 345-350. https://doi.org/10.1177/0706743718804542

Halladay, J., Petker, T., Fein, A., Munn, C., & MacKillop, J. (2018). Brief interventions for cannabis use in emerging adults: Protocol for a systematic review, meta-analysis, and evidence map. Systematic Reviews, 7(1), 106. https://doi.org/10.1186/s13643-018-0772-z

Halladay, J., Fein, A., MacKillop, J., & Munn, C. (2018). PAUSE: The development and implementation of a novel brief intervention program targeting cannabis and alcohol use among university students. The Canadian Journal of Addiction, 9(2): 34-42. https://doi.org/1097/CXA.0000000000000020

Halladay, J., Dawdy, J. McNarmara, I., Chen, A., Vitoroulis, I., McInnes, N., & Munn, C. (2018). Mindfulness for the mental health and well-being of post-secondary students: A systematic review and meta-analysis. Mindfulness, 10(3), 397-414. https://doi.org/10.1007/s12671-018-0979-z