Mental health and addictions

Read our publications related to this topic.

Journal Articles

09/12/2025

Deliberate self-harm and suicide in individuals with cannabis-related hospital contacts in Ontario, Canada

Fabiano N, Vargatoth E, Pugliese M, MacDonald-Spracklin R, Willows M, Solmi M, Myran DT. Mol Psychiatry. 2025; Dec 9 [Epub ahead of print].

Journal Article

02/12/2025

Hospital-based care for hallucinogens and risk of mania and bipolar disorder: a population-based cohort study

Myran DT, MacDonald-Spracklin R, Pugliese M, Gibb M, Fiedorowicz JG, Kaster TS, Solmi M. PLoS Med. 2025; 22(12): e1004805.

Journal Article

25/11/2025

COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study

Hanna M, Subic AM, Park AL, Wu F, Campbell DM, Leece P, Morrison L, Parsons J, Sellen K, Strike C, Gomes T, Orkin AM. BMJ Public Health. 2025; 3(2): e002755.

Journal Article

18/11/2025

Patterns in mental health- and substance use-related visits from 2003 to 2022 among registered Ontario physicians

Gibb MA, Harrison L, Dumicho AY, Sood MM, Tanuseputro P, Moledina A, Tuna M, Halilou T, Kendall CE, Colman I, Fernando SM, Roberts RL, Maskerine C, Myran DT. Ann Intern Med. 2025; Nov 18 [Epub ahead of print].

Journal Article

17/11/2025

A population-based cohort study of early infant feeding initiation in maternal bipolar disorder

Askari N, Lubotzky-Gete S, Crocker M, Barker LC, Brown HK, Huang A, Taylor C, Clark CT, Dennis CL, Vigod SN. Bipolar Disord. 2025; Nov 17 [Epub ahead of print].

Journal Article

17/11/2025

Initiation of opioid agonist treatment following hospital-treated opioid toxicities and the risk of repeat events in Ontario, Canada: a cohort study using inverse probability of treatment weights

Ledlie S, Tadrous M, Bayoumi AM, McCormack D, Kent JT, Besharah J, Munro C, Gomes T. BMJ Public Health. 2025; 3(2): e002779.

Journal Article

12/11/2025

Relationship between palliative care and location of death among people with opioid use disorder: a retrospective cohort study

Boucher LM, Lau J, Scott MM, Everett K, Gomes T, Tanuseputro P, Jennings S, Bagnarol R, Zimmermann C, McLeod A, Isenberg SR. J Palliat Care. 2025; 8258597251392965. Epub 2025 Nov 12.

Journal Article

30/10/2025

Regional and sociodemographic variation of incident first-episode psychosis in Ontario, Canada

Sharpe I, Babujee A, Foussias G, Vigod SN, Kurdyak P. Int J Popul Data Sci. 2025; 10(1):2968.

Journal Article

14/10/2025

From crisis to silence: systemic failures in mental healthcare for transgender and gender diverse people in Ontario

Lam JSH, Zaheer J, Anderson VIR, de Silva Wijeyeratne R, Kurdyak P. Healthc Q. 2025; 28(2).

Journal Article

29/09/2025

Long-stay psychiatric inpatients with and without intellectual and developmental disabilities: an Ontario population-based study

Selick A, Campitelli MA, Huang A, Balogh R, Kurdyak P, Lunsky Y. Can J Psychiatry. 2025; Sep 29.

See All

News Releases

News Release

29/09/2025

Patients with intellectual and developmental disabilities substantially over-represented among long-stay psychiatric inpatients

Individuals with intellectual and developmental disabilities (IDD) account for more than one in five patients who have been in Ontario’s mental health beds for over a year, according to a new study from researchers at ICES and the Centre for Addiction and Mental Health (CAMH).

News Release

25/07/2025

14/04/2025

Research Programs and appointed ICES Scientists

ICES scientists are appointed to the ICES Research Program which best fits their interests and, as such, become members of a network of health services researchers from across Ontario.

ICES Scientists Research Programs

Mental health and addictions

Journal Articles

Deliberate self-harm and suicide in individuals with cannabis-related hospital contacts in Ontario, Canada

Hospital-based care for hallucinogens and risk of mania and bipolar disorder: a population-based cohort study

COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study

Patterns in mental health- and substance use-related visits from 2003 to 2022 among registered Ontario physicians

A population-based cohort study of early infant feeding initiation in maternal bipolar disorder

Initiation of opioid agonist treatment following hospital-treated opioid toxicities and the risk of repeat events in Ontario, Canada: a cohort study using inverse probability of treatment weights

Relationship between palliative care and location of death among people with opioid use disorder: a retrospective cohort study

Regional and sociodemographic variation of incident first-episode psychosis in Ontario, Canada

From crisis to silence: systemic failures in mental healthcare for transgender and gender diverse people in Ontario

Long-stay psychiatric inpatients with and without intellectual and developmental disabilities: an Ontario population-based study

News Releases

Patients with intellectual and developmental disabilities substantially over-represented among long-stay psychiatric inpatients

Surrogates more likely to be diagnosed with mental illness, study finds

Correctional populations in Ontario have twenty times the rate of substance use-related healthcare visits, study finds

Safer opioid supply improves health outcomes among people at high risk of overdose

Hospital visits for cannabis use linked to higher dementia risk, study finds

Transgender and gender diverse people less likely to receive follow-up after a mental health hospitalization

Contribution of cannabis use disorder to new cases of schizophrenia has almost tripled over the past 17 years

Multiple sclerosis linked to higher risk of mental illness during and after pregnancy

Accidental drug and alcohol-related deaths rising in Ontario, especially those involving multiple substances: report

Psychedelic use linked to increased risk of schizophrenia, study finds

Research Programs and appointed ICES Scientists