Challenging the myth of an "epidemic" of common mental disorders: trends in the global prevalence of anxiety and depression between 1990 and 2010

Baxter, Amanda J., Scott, Kate M., Ferrari, Alize J., Norman, Rosana E., Vos, Theo and Whiteford, Harvey A. (2014) Challenging the myth of an "epidemic" of common mental disorders: trends in the global prevalence of anxiety and depression between 1990 and 2010. Depression and Anxiety, 31 6: 506-516. doi:10.1002/da.22230


Author Baxter, Amanda J.
Scott, Kate M.
Ferrari, Alize J.
Norman, Rosana E.
Vos, Theo
Whiteford, Harvey A.
Title Challenging the myth of an "epidemic" of common mental disorders: trends in the global prevalence of anxiety and depression between 1990 and 2010
Journal name Depression and Anxiety   Check publisher's open access policy
ISSN 1091-4269
1520-6394
Publication date 2014-01-21
Sub-type Article (original research)
DOI 10.1002/da.22230
Volume 31
Issue 6
Start page 506
End page 516
Total pages 11
Place of publication Hoboken, NJ, United States
Publisher Jossey Bass
Language eng
Formatted abstract
Background: Anxiety disorders and major depressive disorder (MDD) are common and disabling mental disorders. This paper aims to test the hypothesis that common mental disorders have become more prevalent over the past two decades. Methods: We conducted a systematic review of prevalence, remission, duration, and excess mortality studies for anxiety disorders and MDD and then used a Bayesian meta-regression approach to estimate point prevalence for 1990, 2005, and 2010. We also conducted a post-hoc search for studies that used the General Health Questionnaire (GHQ) as a measure of psychological distress and tested for trends to present a qualitative comparison of study findings

Results: This study found no evidence for an increased prevalence of anxiety disorders or MDD. While the crude number of cases increased by 36%, this was explained by population growth and changing age structures. Point prevalence of anxiety disorders was estimated at 3.8% (3.6-4.1%) in 1990 and 4.0% (3.7-4.2%) in 2010. The prevalence of MDD was unchanged at 4.4% in 1990 (4.2-4.7%) and 2010 (4.1-4.7%). However, 8 of the 11 GHQ studies found a significant increase in psychological distress over time.

Conclusions: The perceived "epidemic" of common mental disorders is most likely explained by the increasing numbers of affected patients driven by increasing population sizes. Additional factors that may explain this perception include the higher rates of psychological distress as measured using symptom checklists, greater public awareness, and the use of terms such as anxiety and depression in a context where they do not represent clinical disorders.
Keyword Anxiety/anxiety disorders
Crossnational
Depression
Epidemiology
International
Mood disorders
Obesity
Stress
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Mon, 17 Mar 2014, 20:39:26 EST by Nyree Divitini on behalf of Health LinQ