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What is incidence?

Incidence refers to how many new cases of bipolar disorder there are in a population in a specified time period. It is different from prevalence, which refers to how many existing cases there are at a particular point in time, or over a lifetime. Incidence is usually reported as the number of new cases per 100,000 people per year.

What is the evidence on the incidence of bipolar disorder?

Moderate to high quality evidence suggests an incidence rate of around 3.7 per 100,000 person years. These rates were assessed in the UK, and were similar over time (1971 to 2002), gender, and urban region.

This rate is only indicative of rates in other regions, as there were no systematic reviews identified that were published since 2010 and assessed incidence rates in these regions.

April 2019

Last updated at: 4:47 am, 9th April 2019
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Title Colour Legend:
Green - Topic summary is available.
Orange - Topic summary is being compiled.
Red - Topic summary has no current systematic review available.