Clinical depression
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Depression is a mental illness that can affect mood, cognition, and physiological functioning. Each year about 21 million American adults (nearly 10% of the population) suffer from depression or a related illness[1]. The primary symptoms of depression include feeling sad or melancholic and losing in interest in activities that are usually enjoyable. Depression can also include significant, unintentional weight loss; difficulty sleeping or oversleeping; restlessness; fatigue or loss of energy; feeling worthless or inappropriately guilty; difficulty thinking or concentrating; and thoughts of suicide[2].
References
- ↑ Robins, L.N. & Regier, D.A. (1990). Psychiatric Disorders in America: The Epidemiologic Catchment Area Study. New York: The Free Press.
- ↑ American Psychiatric Association (1994). Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Washington, DC: American Psychiatric Association.