include disruptive mood dysregulation disorder, major depressive disorder (including major depressive episode), persistent depressive disorder (dysthymia), premenstrual dysphoric disorder, substance/medication-induced depres sive disorder, depressive disorder due to another medical condition, other specified de pressive disorder, and imspecified depressive disorder. Unlike in DSM-IV, this chapter "Depressive Disorders" has been separated from the previous chapter "Bipolar and Re lated Disorders." The common feature of all of these disorders is the presence of sad, empty, or irritable mood, accompanied by somatic and cognitive changes that signifi cantly affect the individual's capacity to function. What differs among them are issues of duration, timing, or presumed etiology.