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Progress against major depression in Canada.

Scott B Patten1

  • 1Alberta Heritage Foundation for Medical Research, Department of Community Health Sciences, Department of Psychiatry, University of Calgary, Calgary, Alberta. patten@ucalgary.ca

Canadian Journal of Psychiatry. Revue Canadienne De Psychiatrie
|November 8, 2002
PubMed
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Public health strategies for major depression in Canada show progress, with increased antidepressant treatment utilization observed. This trend may be linked to improved population mental health, though direct causality remains unconfirmed.

Area of Science:

  • Public Health
  • Epidemiology
  • Mental Health Research

Background:

  • Traditional public health strategies for major depression include case-finding, education, and disease management.
  • The goal of these strategies is to increase treatment utilization and improve outcomes, leading to better population mental health.
  • Empirical confirmation of progress in population mental health due to these strategies has been challenging.

Purpose of the Study:

  • To evaluate trends in major depression prevalence and treatment utilization in Canada.
  • To assess the impact of public health interventions on population mental health over time.
  • Utilizing longitudinal data from the National Population Health Survey (NPHS).

Main Methods:

  • Analysis of longitudinal data from three cycles (1994-1995, 1996-1997, 1998-1999) of the Canadian National Population Health Survey (NPHS).

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  • Major depression point prevalence was determined using a predictive instrument for annual major depressive episode (MDE) and distress scale responses.
  • Treatment utilization for major depression was assessed across the survey cycles.

    • Main Results:

    • The proportion of individuals with depression receiving antidepressant treatment significantly increased from 18.2% in 1994-1995 to 32.6% in 1998-1999.
    • Point prevalence of major depression remained relatively stable, recorded at 2.4%, 1.8%, and 1.9% across the three NPHS iterations.
    • A notable rise in antidepressant treatment uptake among those with major depression was observed.

    Conclusions:

    • NPHS data suggest positive public health advancements in addressing major depression in Canada, evidenced by increased treatment rates.
    • The observed increase in treatment utilization may be associated with improvements in population mental health status.
    • Causality between treatment utilization and population health status cannot be definitively established due to potential confounding factors and data limitations.