Association between cannabis use disorder and self- and other-directed aggression

Cannabis is the most widely used drug worldwide. Data about the association of cannabis use with aggression is heterogeneous. The objective of the current study was to assess the nature of the association between cannabis use disorder (CUD) and self-directed, other-directed, and combined aggression. We used data from the National Survey on Drug Use and […]

Suicide and self-harm among physicians in Ontario, Canada

Background Studies of occupation-associated suicide suggest physicians may be at a higher risk of suicide compared to nonphysicians. We set out to assess the risk of suicide and self-harm among physicians and compare it to nonphysicians. Methods We conducted a population-based, retrospective cohort study using registration data from the College of Physicians and Surgeons of […]

Examination of the geographic parameters of suicide: A historical comparison study of Ontario and Alberta

Within Canada, suicide rates vary by province which may be attributed to several factors which have been studied. A longitudinal study examining social factors such as birth, divorce and marriage rates from 1950 to1990 found a positive correlation between divorce rates and suicide rates and “a negative association between birth rates and suicide rates”. Other […]

Trends and factors associated with suicide deaths in older adults in Ontario, Canada

Background: Suicide in older adults is a significant overlooked problem worldwide. This is especially true in Canada where a national suicide prevention strategy has not been established. Methods: Using linked health-care administrative databases, this population-level study (2011 to 2015) described the incidence of older adult suicide (aged 65+), and identified clinical and socio-demographic factors associated […]

Suicides in young people in Ontario following the release of “13 Reasons Why”

Objective: “13 Reasons Why,” a Netflix series, included a controversial depiction of suicide that has raised fears about possible contagion. Studies of youth suicide in the United States found an increase on the order of 10% following release of the show, but this has not been replicated in other countries. This study aims to begin to […]

Prevalence and correlates of youth suicidal ideation and attempts: Evidence from the 2014 Ontario Child Health Study

Objectives: To present the 12-month prevalence and correlates of suicidal ideation and attempts in a sample of youth in Ontario. Methods: Data come from the 2014 Ontario Child Health Study, a provincially representative survey of families with children in Ontario. Youth aged 14 to 17 y (n = 2,396) completed a computer-assisted, self-administered questionnaire in their […]

Examining the association between suicidal behaviors and referral for mental health services among children involved in the child welfare system in Ontario, Canada

Although various studies have investigated factors associated with mental health service utilization, few studies have examined factors associated with referral for mental health services among maltreated children. The objective of this study was to examine the association between suicidal thoughts and self-harming behavior and referral for mental health services among children involved in the Child […]

Suicide-related Twitter content in response to a national mental health awareness campaign and the association between the campaign and suicide rates in Ontario

Objective: Mental health awareness (MHA) campaigns have been shown to be successful in improving mental health literacy, decreasing stigma, and generating public discussion. However, there is a dearth of evidence regarding the effects of these campaigns on behavioral outcomes such as suicides. Therefore, the objective of this article is to characterize the association between the event […]

Firearm-related injuries and deaths in Ontario, Canada, 2002-2016: A population-based study

BACKGROUND: Firearm-related injury is an important and preventable cause of death and disability. We describe the burden, baseline characteristics and regional rates of firearm-related injury and death in Ontario. METHODS: We conducted a population-based cross-sectional study using linked data from health administrative data sets held at ICES. We identified residents of Ontario of all ages who were […]

Evaluation of Talk Today, a program of the Canadian Mental Health Association, Ontario Division: Part A Report

McGill’s Faculty of Education began a collaboration with the Canadian Mental Health Association, Ontario Division in 2018 to evaluate their Talk Today program. The present report details the Talk Today program designed by CMHA Ontario and is a comprehensive mental health program aimed at promoting and spreading awareness of mental health for young athletes. Additionally, […]

Trends of intentional drug overdose among youth: A population-based cohort study

Background: Intentional overdose is the commonest form of self-harm in adolescents globally. We explored temporal trends in intentional overdose among youth. Methods: Using multiple linked healthcare databases, we conducted a population-based cohort study in Ontario, Canada, from 2002 to 2015. We included all patients aged 8 to 19 years who presented to an emergency department (ED) or were […]

Changing rates of self-harm and mental disorders by sex in youths presenting to Ontario emergency departments: Repeated cross-sectional study

Objective: To document the rates of intentional self-harm and mental disorders among youths aged 13 to 17 years visiting Ontario emergency departments (EDs) from 2003-2017. Methods: This was a repeated cross-sectional observational design. Outcomes were rates of adolescents with (1) at least 1 self-harm ED visit and (2) a visit with a mental disorder code. […]

Strengthening suicide prevention in Ontario hospitals: A report from the OHA Task Force on Suicide Prevention

In 2015, the Ministry of Health and Long-Term Care asked the Ontario Hospital Association (OHA) to create a Task Force to recommend safe medical practices for patients atrisk of suicide. The OHA Task Force on Suicide Prevention (Task Force) met regularly throughout the 2015-16 year, examined current hospital policies and protocols for suicide prevention and assessment, […]

Perinatal suicide in Ontario, Canada: A 15-year population-based study.

BACKGROUND: Death by suicide during the perinatal period has been understudied in Canada. We examined the epidemiology of and health service use related to suicides during pregnancy and the first postpartum year. METHODS: In this retrospective, population-based cohort study, we linked health administrative databases with coroner death records (1994–2008) for Ontario, Canada. We compared sociodemographic characteristics, clinical […]

Is tetraethyl lead poison affecting contemporary indigenous suicides in Ontario, Canada?

Highlights •Lead (Pb) poison levels where high among the Indigenous population of Northwestern Ontario prior to the outbreak of a suicide epidemic in the area. •Pb contributes to an overexpression of the amyloid-β protein precursor (AβPP) and amyloid-β (Aβ) which contribute to enhanced pathologic neurodegeneration. •Pb causes a down-regulation (4-fold) of the 5-hydroxytryptamine 1B receptor […]


An Ojibwe boy runs away from a North Ontario Indian School, not realizing just how far away home is. Along the way he’s followed by Manitous, spirits of the forest who comment on his plight, cajoling, taunting, and ultimately offering him a type of comfort on his difficult journey back to the place he was […]

Invisible north: The search for answers on a troubled reserve.

When freelance journalist Alexandra Shimo arrives in Kashechewan, a fly-in, northern Ontario reserve, to investigate rumours of a fabricated water crisis and document its deplorable living conditions, she finds herself drawn into the troubles of the reserve. Unable to cope with the desperate conditions, she begins to fall apart. A moving tribute to the power […]

Born with a tooth.

Before internationally acclaimed author Joseph Boyden penned his bestselling novel Three Day Road and his Scotiabank Giller Prize–winning novel, Through Black Spruce, he published a powerful collection of thirteen stories about modern Aboriginal life that made readers and reviewers take notice. These stories of love, loss, rage and resilience match virtuosic style with clever wit […]

Mental health service use among children and youth in Ontario: Population-based trends over time.

Little is known about mental health service use among Canadian children and youth. Our objective was to examine temporal trends in mental health service use across different sectors of the health care system among children and youth living in Ontario. Methods: We conducted a population-based, repeated annual cross-sectional study of mental health service use, including […]

Adding it all up: A value-based planning process for child and youth mental health services.

This report proposes an answer to the question posed by the Ministry of Children and Youth Services (MCYS) and lead agencies: How can lead agencies best allocate their resources across the seven core services? We recommend a collaborative decision-making process whereby MCYS and lead agencies clarify the value and cost of services when determining allocations. […]

A longitudinal examination of rural status and suicide risk.


Migraine headache and risk of self-harm and suicide: A population-based study in Ontario, Canada.

The aim of this article was to examine the association between migraine headache and self-harm and suicide mortality using population-based health administrative data from Ontario, Canada. Physician diagnosis of migraine headache was found to be prospectively associated with increased risk of deliberate self-harm, but there was no evidence linking it to suicide mortality. Definitively linking […]

Examining non-suicidal self-injury among adolescents with mental health needs, in Ontario, Canada.

The objectives of this study were to examine the prevalence of non-suicidal self-injury (NSSI) among adolescents with mental health needs and specific factors associated with NSSI among adolescents aged 14 to 18 years who received mental health services in adult mental health facilities in Ontario, Canada. Females were 2.19 times more likely to engage in […]