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The first published figures on the 14 country surveys completed to date, indicate that, of those disorders assessed, anxiety disorders are the most common in all but 1 country (prevalence in the prior 12-month period of 2.4% to 18.2%) and mood disorders next most common in all but 2 countries (12-month prevalence of 0.8% to 9.6%), while ...
This statistic is often referred to as lifetime prevalence. Today, epidemiological studies focus on the etiology of mental disorders, i.e. the identification and quantification of causes underlying psychiatric problems and their mechanisms, rather than mere estimation of prevalence.
Lifetime prevalence (LTP) is the proportion of individuals in a population that at some point in their life (up to the time of assessment) have experienced a "case" (e.g., a disease, a traumatic event, or, a behavior, such as committing a crime). Often, a 12-month prevalence (or some other type of "period prevalence") is provided in conjunction ...
In the United States, the lifetime prevalence of anxiety disorders is about 29%, [103] and between 11 and 18% of adults have the condition in a given year. [102] This difference is affected by the range of ways in which different cultures interpret anxiety symptoms and what they consider to be normative behavior.
The global estimated lifetime prevalence of bipolar disorder among adults range from 1 to 3 percent. [63] The annual incidence is estimated to vary from 0.3 to 1.2 percent worldwide. [23] According to the World Mental Health Survey Initiative, the lifetime prevalence of BP-II was found to be 0.4%, with a 12-month prevalence of 0.3%. [64]
Specific phobias have a lifetime prevalence rate of 7.4% and a one-year prevalence of 5.5% according to data collected from 22 different countries. [22] The usual age of onset is childhood to adolescence. During childhood and adolescence, the incidence of new specific phobias is much higher in females than males.
[12] [13] Studies conflict on the prevalence of depression in the elderly, but most data suggest there is a reduction in this age group. [14] Depressive disorders are most common in urban than in rural population and, in general, the prevalence is higher in groups with adverse socio-economic factors (for example in homeless people). [15]
The lifetime prevalence of dissociative disorders varies from 10% in the general population to 46% in psychiatric inpatients. [24] Diagnosis can be made with the help of structured clinical interviews such as the Dissociative Disorders Interview Schedule (DDIS) and the Structured Clinical Interview for DSM-IV Dissociative Disorders (SCID-D-R ...