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The average lifetime prevalence found was 6.7% for MDD (with a relatively low lifetime prevalence rate in higher-quality studies, compared to the rates typically highlighted of 5–12% for men and 10–25% for women), and rates of 3.6% for dysthymia and 0.8% for Bipolar 1. [18]
As an example, in an attempt to measure the prevalence of mental illness in the United States, Lee Robins and Darrel A. Regier conducted a study called the Epidemiological Catchment Area Project which surveyed samples of the general population at five sites across America. In the study, it was found that about a third of all Americans ...
In science, prevalence describes a proportion (typically expressed as a percentage). For example, the prevalence of obesity among American adults in 2001 was estimated by the U. S. Centers for Disease Control (CDC) at approximately 20.9%. [5] Prevalence is a term that means being widespread and it is distinct from incidence.
[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 ...
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 ]
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A study conducted in 1988 to 1994 amongst young American adults involved a selection of demographic and health characteristics. A population-based sample of 8,602 men and women ages 17–39 years participated. Lifetime prevalence were estimated based on six mood measures: major depressive episode (MDE) 8.6%,