Prevalence and Incidence of Schizophrenia
Prevalance of Schizophrenia:
Approximately 2.2 million American adults (NIMH); estimated 1.3% adults (USSG); more than 2 million Americans ... see also overview of Schizophrenia.
Prevalance Rate:
approx 1 in 123 or 0.81% or 2.2 million people in USA [Source statistic for calcuation: "Approximately 2.2 million American adults (NIMH); estimated 1.3% adults (USSG); more than 2 million Americans" -- see also general information about data sources]
Schizophrenia Prevalence: Book Excerpts
Prevalance of Schizophrenia:
More than 2 million Americans are affected by schizophrenia. (Source: excerpt from Schizophrenia Research at the NIMH: NIMH)
Prevelance of Schizophrenia discussion:
Rates of schizophrenia are very similar from country to
country—about 1 percent of the population.5
(Source: excerpt from When Someone Has Schizophrenia: NIMH)
More Statistics about Schizophrenia:
Hospitalization statistics
All statistics for Schizophrenia
Prevalence/Incidence of Schizophrenia: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about the prevalence and/or incidence of Schizophrenia.
Schizophrenia:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Schizophrenia affects 1% to 2% of the population in the United States and is equally prevalent in both sexes. It may result from a combination of genetic, biological, cultural, and psychological factors. Some evidence supports a genetic predisposition. Close relatives of people with schizophrenia have a greater likelihood of developing schizophrenia; the closer the degree of biological relatedness, the higher the risk.
The most widely accepted biochemical theory holds that schizophrenia results from excessive activity at dopaminergic synapses. Other neurotransmitter alterations, such as serotonin increases, may also contribute to schizophrenic symptoms. In addition, patients with schizophrenia have structural abnormalities of the frontal and temporolimbic systems. Computed tomography scans and magnetic resonance imaging studies show various structural brain abnormalities, including frontal lobe atrophy and increased lateral and third ventricles. Positron emission tomography scans substantiate frontal lobe hypometabolism.
Numerous psychological and sociocultural causes, such as disturbed family and interpersonal patterns, also have been proposed. Schizophrenia is more common in lower socioeconomic groups, possibly due to downward social drift, lack of upward socioeconomic mobility, and high stress levels that may stem from poverty, social failure, illness, and inadequate social resources. Higher incidence is also linked to low birth weight and congenital deafness.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
About prevalence and incidence statistics:
The term 'prevalence' of Schizophrenia usually refers to the estimated population
of people who are managing Schizophrenia at any given time.
The term 'incidence' of Schizophrenia refers to the annual diagnosis rate,
or the number of new cases of Schizophrenia diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.
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