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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]
[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 more common in urban than in rural populations and, in general, the prevalence is higher in groups with adverse socio-economic factors (for example in homeless people). [15]
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 ...
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 ]
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 ...
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 ...
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.
Schizophrenia affects around 0.3–0.7% of the general population at some point in life (i.e. lifetime prevalence), [1] or 21 million people worldwide as of 2020 (about one of every 285). [2] By using precise methods in its diagnosis and a large, representative population, schizophrenia seems to occur with relative consistency over time during ...