Anxiety disorder is a blanket term covering several different forms of a type of common psychiatric disorder characterized by excessive rumination, worrying, uneasiness, apprehension and fear about future uncertainties either based on real or imagined events, which may affect both physical and psychological health. There are numerous psychiatric and medical syndromes which may mimic the symptoms of an anxiety disorder such as hyperthyroidism which is frequently misdiagnosed as generalized anxiety disorder.
True anxiety disorders seem to have a variety of psychosocial causes; and may involve a genetic predisposition. Individuals diagnosed with an anxiety disorder may be classified in one of two categories; based on whether they experience continuous or episodic symptoms.
Current psychiatric diagnostic criteria recognize a wide variety of anxiety disorders. Recent surveys have found that as many as 18% of Americans and 14% of Europeans may be affected by one or more of them.
The term anxiety covers four aspects of experiences an individual may have: mental apprehension, physical tension, physical symptoms and dissociative anxiety. Anxiety disorder is divided into generalized anxiety disorder, phobic disorder, and panic disorder; each has its own characteristics and symptoms and they require different treatment (Gelder et al. 2005). The emotions present in anxiety disorders range from simple nervousness to bouts of terror (Barker 2003).
Standardized screening clinical questionnaires such as the Taylor Manifest Anxiety Scale or the Zung Self-Rating Anxiety Scale can be used to detect anxiety symptoms, and suggest the need for a formal diagnostic assessment of anxiety disorder.
Read more about Anxiety Disorder: Prevention, Diagnosis, Treatment, Prognosis, Epidemiology
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