#3 Number of sufferers
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In the United States alone, nearly 10 percent of the adult population deals with some type of depression-related disorder every year. A number of conditions are included in this group, including major depressive disorder, bipolar disorder (formerly called manic depression), and dysthymic disorder. Up to 30 percent of women may be suffering from some form of depression, and although the numbers were always thought to be significantly lower for men, new research suggests that the number of men suffering from depression may be much higher.
