Mr. Chair and honourable members, thank you for the invitation to address this committee regarding its study of Bill C-211, an act respecting a federal framework on post-traumatic stress disorder.
Let me begin by reiterating a statement by the World Health Organization in 2004: that there is no health without mental health.
Mental illnesses, including post-traumatic stress disorder or PTSD, are recognized, medically diagnosable illnesses that result in the significant impairment of an individual's cognitive, affective, or relational abilities. Mental illnesses are the result of a complex interaction of biological, developmental, and psychosocial factors. Environmental factors, such as exposure to trauma, can precipitate the onset or recurrence of a mental illness.
Mental health in Canada is a complicated issue that has both direct and indirect impacts on a significant number of Canadians every year.
The federal government has a role to play in the coordination and collaboration of mental health activities. It also has a role in understanding scientific evidence related to the scope of the challenges and what works best to address them. This evidence informs the development of resources for information on best practices and innovation.
While the federal government also has responsibility for mental health services for specific federal populations, such as serving members of the Canadian Armed Forces, veterans, serving and former members of the Royal Canadian Mounted Police and the Correctional Service of Canada, indigenous populations, newcomers—including refugees—and federally incarcerated individuals, the Public Health Agency of Canada, where I work, is mandated to serve the broader Canadian population. As such, we work with other government departments, stakeholders, and partners in the promotion and monitoring of mental health for all Canadians.
Several federal and national partners play a role in mental health promotion.
Statistics Canada has a federal responsibility to collect data on the Canadian population, including through the census and population surveys. The Canadian Institute for Health Information, CIHI, holds and manages national-level health administrative data, such as hospital billing data. Health Canada manages the Canadian drug strategy, which includes the monitoring of the use of illicit substances. The Mental Health Commission of Canada coordinates a network of partners through the Mental Health and Addiction Information Collaborative, of which, we, Statistics Canada, CIHI, Health Canada, and other partners are members.
The Public Health Agency of Canada contributes an important piece to the understanding of mental health in Canada by conducting national monitoring of mental health, mental illness, self-harm and suicide, and family violence, and related risk and protective factors. These areas often have strong associations with PTSD, either as potentially precipitating factors in the case of the trauma experienced with family violence, or as outcomes with mental illness and even suicide.
Mental illness monitoring is a core public health activity relying on population surveys, such as those conducted by Statistics Canada, and on administrative data collected by the provinces and territories, which includes physician billing claims and hospital discharge records linked to health insurance registries.
Bill C-211 proposes improving the tracking of the incidence rates and the associated economic and social costs of PTSD. Currently, monitoring of PTSD in the general Canadian population relies on data from national population surveys conducted by Statistics Canada, such as the Canadian community health survey of 2012 on mental health.
In 2012, 1.7% of the population aged 15 and over reported that they had PTSD. This is an increase from 2002 when 1% reported that they had PTSD. This increase is primarily due to an increase in prevalence among women. It went from 1.2% in 2002 to 2.4% in 2012. It is important to note that estimates of self-reported diagnosed PTSD from survey data are thought to underestimate the true prevalence of the disorder.
Another consideration for the monitoring of PTSD is the use of provincial and territorial health administrative data, which has been successful for other chronic conditions, through the Canadian chronic disease surveillance system. The CCDSS is a collaborative network of provincial and territorial chronic disease monitoring systems led by the Public Health Agency of Canada and relying on linked physician billings and hospitalization data.
For PTSD specifically, physician billings are not available in all provinces and territories as not all provinces or territories go to the same level of specificity. Coding standards are jurisdictional issues in which CIHI plays a role. However, it could be possible to conduct monitoring for a few provinces and territories that can currently identify PTSD. At the national level it may be possible to establish monitoring using administrative data for broader categories, for example, adjustment disorders that include other conditions related to adjustment reactions to stress, such as but not limited to PTSD.
PTSD is often treated through therapy methods that are outside the publicly funded health care system, such as occupational therapy, psychologists' services, and social work. Therefore health care administrative data would underestimate the disease prevalence and be an indicator of health service utilization rather than disease prevalence. Currently no monitoring system captures data from community-based services outside the health care system.
It is important to note that while national population surveys have previously asked respondents to indicate whether they have PTSD, estimates based on self-reported diagnosis are thought to underestimate the true prevalence of the disorder as people may not have been diagnosed or may be unwilling to divulge their diagnosis.
Surveys that rely on the reporting of individual symptoms consistent with PTSD rather than self-reported, physician-diagnosed PTSD however, may be able to provide accurate information on the prevalence and the impacts of living with the condition for the purpose of monitoring. For example, in 2001 McMaster researchers conducted a study using symptom-based survey tools and reported a lifetime prevalence of PTSD of 9.2%, which is higher than the prevalence reported from the Canadian community health survey of 2012 on mental health. Due to the large sample of respondents that would be required as well as survey content and length, this would be costly to conduct.
Moving forward, as I've outlined, there may be opportunities to enhance the monitoring of PTSD using surveys and/or administrative data.
The Public Health Agency of Canada is committed to working with partners and stakeholders to develop ways of measuring and reporting on the burden of PTSD in Canada.
Thank you for your attention. I would be pleased to answer any questions you have.