JAMA : the journal of the American Medical Association
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Comparative Study
Cross-national epidemiology of major depression and bipolar disorder.
To estimate the rates and patterns of major depression and bipolar disorder based on cross-national epidemiologic surveys. ⋯ There are striking similarities across countries in patterns of major depression and of bipolar disorder. The differences in rates for major depression across countries suggest that cultural differences or different risk factors affect the expression of the disorder.