Homeless people

What is prevalence?

Prevalence measures the proportion of individuals who have a disorder at a particular point in time (point prevalence) or during a specified period (annual prevalence, lifetime prevalence) and this may vary across regions. It is distinct from incidence, which refers to how many new cases there are per population in a specified time period. Lifetime prevalence is the number of individuals in a population that at some point in their life have experienced schizophrenia compared to the total number of individuals.

What is the evidence for the prevalence of schizophrenia in homeless populations?

Moderate to high quality evidence suggests overall prevalence rate of any psychotic disorder is between 11% and 13% in western countries. This rate varied between countries; 19% in the UK, 16% in Australia, 12% in Europe, and 9% in the US.

Moderate quality evidence shows rates of schizophrenia in homeless populations varied across US cities, with rates higher in Los Angeles than in New York, which had higher rates than Philadelphia. Rates were generally higher in younger than older age-groups, higher in chronically homeless people, and higher in women than in men.

January 2019

Last updated at: 1:06 am, 29th March 2019
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