How prevalent is sadness in major depressive disorder?

Prevalence of Major Depressive Episode Among Adolescents. Figure 4 shows the past year prevalence of major depressive episode among U.S. adolescents in 2016. An estimated 3.1 million adolescents aged 12 to 17 in the United States had at least one major depressive episode. This number represented 12.8% of the U.S. population aged 12 to 17. read more

Bipolar disorder, also called manic-depressive illness is not as prevalent as major depression or dysthymia, and characterized by cycling mood changes: severe highs (mania) and lows (depression). read more

Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems. read more