Dr. Jillian Halladay

Clinical Epidemiologist & Registered Nurse

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Dr. Jillian Halladay

Clinical Epidemiologist & Registered Nurse

Through rigorous research, my mission is to work with youth and their loved ones to...

Understand co-occuring substance use & mental health concerns among youth
Develop & evaluate innovative prevention and early intervention initiatives
Support youth in living hopeful, happy, fun & meaningful lives

I am a Registered Nurse, Clinical Epidemiologist (Msc, PhD), and current Assistant Professor in the School of Nursing at McMaster University. I am also a Faculty Affiliate of the Peter Boris Centre for Addictions Research (Canada), Associate of the Research Institute of St. Joe’s Hamilton Mental Health and Addictions Program (Canada), and Affiliate of the Matilda Centre for Research in Mental Health and Substance Use (Australia). I currently hold a Health System Impact Embedded Early Career Researcher Award co-funded by the Canadian Institute of Health Research, McMaster University, and St. Joseph’s Healthcare Hamilton. 

My research is focused on deepening our understanding of the biological, psychological, and socio-contextual factors that contribute to co-occurring substance use and mental health concerns among youth (10-25 years of age), and how to prevent and treat this co-occurrence. My Health Systems Impact work is specifically centred on young adults who enter the adult hospital system with substance use concerns. I also have clinical experience related to inpatient, emergency, and outpatient youth mental health and substance use. I have also supported the development and evaluation of several interventions for young people, including a new outpatient young adult substance use program in Hamilton (for those 17-25 years of age). 

My clinical and research roles are all grounded in identifying, contributing to, and utilizing the best available evidence to improve the lives of youth

Notable Achievements:

  • 2024 – CIHR Health System Impact Embedded Early Career Researcher Award (2024-2028) 
  • 2022 – CIHR Banting Postdoctoral Researcher
  • 2022 – Frayme Great Big Stories Grant: Substance Use Stream
  • 2021 – The Association for Child and Adolescent Mental Health
    Research Trainee of the Year Award (listen to podcast here)
  • 2020 – David Sackett Scholarship (read interview here)
  • 2019 – New Investigator Fund from Hamilton Health Sciences
  • 2019 – McMaster Student Union Teaching Award (read article here)
  • 2018 – CIHR Doctoral Research Training Award

Methodological Interests & Expertise

  • Survey design & evaluation
  • Systematic reviews & meta-analyses
  • Linear, logistic, multinomial regression
  • Multilevel modeling
  • Clustering methods
  • Multiverse analysis
  • Missing data approaches
  • Observational designs
  • Intervention studies
  • Program evaluation
  • Youth engagement and co-design
  • Knowledge mobilization

Substantive Interests & Expertise

  • Adolescent, emerging adult, & post-secondary student mental health & substance use
  • Population surveys & monitoring
  • Integration of measurement-based care, quality improvement, & research within clinical practice
  • Positive mental health & wellbeing
  • Movement behaviours (physical activity, sleep, screen time, nutrition)
  • Sex & gender based-analysis

Partnerships and Funders:

McMaster_Nursing
Peter_Boris
3
CIHR
matilda_centre
Offord
HHS
SMHO
Frayme

© Jillian Halladay 2022

© Jillian Halladay 2022