Mental health and addictions

Read our publications related to this topic.

Journal Articles

29/10/2026

Intra-provincial variation of brief substance use withdrawal hospitalizations in Ontario, Canada: a cross-sectional study

Campitelli MA, Sheikh H, Babujee A, Emblem J, Sharpe I, Kurdyak P. Can J Psychiatry. 2026 Oct 29 [Epub ahead of print].

Journal Article

26/10/2026

Substance-related acute care use among birthing parents with dependent children in Ontario, Canada, 2008 to 2024

Webber C, Dover K, Fiedorowicz JG, Simpson A, Vigod S, Barker L, Jin Y, Gandhi J, Isenberg S, Clarke A, Lee C, Pugliese M, Myran D. CMAJ. 2026; 198: E1429-38

Journal Article

14/10/2026

Long-term mental health service utilization among patients with diffuse large B-cell lymphoma: a population-based study

Gong IY, Cheung MC, Chan KKW, Calzavara A, Liu N, Raman HS, Odejide OO, Kurdyak P, Raphael MJ, Prica A, Mozessohn L. Leuk Lymphoma. 2026; Oct 14 [Epub ahead of print].

Journal Article

05/10/2026

Mental health care use among resident physicians compared with the general population

Syed S, Myran DT, Solmi M, Kobewka D, Yoo S, Gibb M, Spilg E, Kendall CE, Fleming N, Maniate JM, Tucker J, Hundemer GL, Colman I, Tanuseputro P, Sood MM. J Gen Intern Med. 2026; Oct 5 [Epub ahead of print].

Journal Article

30/09/2026

Peripartum mental illness in serial pregnancies in mothers with multiple sclerosis and other chronic diseases

Marrie RA, Bolton JM, Ling V, Bernstein CN, Krysko KM, Li P, Rotstein DL, Deakin-Harb K, Maxwell CJ. Mult Scler. 2026; Sep 30 [Epub ahead of print].

Journal Article

28/09/2026

Opioid use disorder diagnosis risk and neighbourhood-level marginalisation: a population-based retrospective cohort study

Liang A, Stuart H, Evans C. J Epidemiol Community Health. 2026; Sep 28 [Epub ahead of print].

Journal Article

19/09/2026

Treatment outcomes after initiating buprenorphine/naloxone or methadone for opioid use disorder among First Nation Peoples in Ontario, Canada

Rebić N, Bragg S, McCormack D, Hamzat B, deGonzague B, Holton A, Mecredy G, Campbell T, Antoniou T, McGregor L, Bertram J, Pine K, Corbiere Y, Gomes T. Int J Drug Policy. 2026; 157(Pt A): 105513. Epub 2026 Sep 19.

Journal Article

16/09/2026

Emergency department visits for gambling disorders after the legalization of single-event sports betting and rapid expansion of online gambling

Forrest R, Doan N, MacDonald-Spracklin R, Pugliese M, Turner N, Myran D. Am J Prev Med. 2026; Sep 16.

Journal Article

15/09/2026

Characterizing trends and patterns in benzodiazepine-related toxicity deaths in Ontario: a descriptive cross-sectional study

Campbell T, Ledlie S, Leece P, Yang J, Hamzat B, Kolla G, Bozinoff N, Boyd R, Franklyn M, Smoke A, Shearer D, Gomes T. PLoS One. 2026; 21(9): e0355210.

Journal Article

09/09/2026

Virtual care expansion and physician follow-up among youth with first mental health contact through a hospital: population-based repeated cross-sectional study

Wennberg E, Hamovitch E, Patrikar A, Austin PC, Kurdyak P, Nelson KE, Babujee A, Guttmann A. JMIR Ment Health 2026; 13: e94389.

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News Releases

News Release

16/09/2026

Emergency room visits for gambling disorders nearly doubled after expanded online gambling market

More than 70 per cent of gambling disorder ED visits involved another mental health condition or heavy substance use and almost one-third of the visits led to hospital admission.

News Release

07/05/2026

Opioid overdose survivors face higher risk of death than previously thought, study finds

After an emergency department visit for an opioid overdose, nine per cent of individuals died and 21 per cent experienced a repeat opioid overdose in the following year.

News Release

29/04/2026

Past violence and brain injury amplify mental health vulnerability after childbirth

The risk of new and severe postpartum mental illness is highest among people who experienced both traumatic brain injury (TBI) and interpersonal violence compared to those with neither factor.

News Release

02/02/2026

More Ontarians are being diagnosed with psychosis than those born in earlier decades

A new study suggests that people born more recently are being diagnosed with psychotic disorders (e.g., schizophrenia) more often and at younger ages compared with people born earlier.

News Release

11/12/2025

Study finds domperidone not associated with severe mental health outcomes in new mothers

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

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

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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

Intra-provincial variation of brief substance use withdrawal hospitalizations in Ontario, Canada: a cross-sectional study

Substance-related acute care use among birthing parents with dependent children in Ontario, Canada, 2008 to 2024

Long-term mental health service utilization among patients with diffuse large B-cell lymphoma: a population-based study

Mental health care use among resident physicians compared with the general population

Peripartum mental illness in serial pregnancies in mothers with multiple sclerosis and other chronic diseases

Opioid use disorder diagnosis risk and neighbourhood-level marginalisation: a population-based retrospective cohort study

Treatment outcomes after initiating buprenorphine/naloxone or methadone for opioid use disorder among First Nation Peoples in Ontario, Canada

Emergency department visits for gambling disorders after the legalization of single-event sports betting and rapid expansion of online gambling

Characterizing trends and patterns in benzodiazepine-related toxicity deaths in Ontario: a descriptive cross-sectional study

Virtual care expansion and physician follow-up among youth with first mental health contact through a hospital: population-based repeated cross-sectional study

News Releases

Emergency room visits for gambling disorders nearly doubled after expanded online gambling market

Opioid overdose survivors face higher risk of death than previously thought, study finds

Past violence and brain injury amplify mental health vulnerability after childbirth

More Ontarians are being diagnosed with psychosis than those born in earlier decades

Study finds domperidone not associated with severe mental health outcomes in new mothers

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

Research Programs and appointed ICES Scientists