What is prevalence?

Prevalence quantifies the proportion of individuals in a population who have a disorder during a specific time period, while incidence refers to the number of new cases that develop in a population during a specific time period. In disorders of short duration, incidence and prevalence rates may be similar, however with disorders of long duration, such as bipolar disorder, there can be variation between the two. Current, or ‘point’ prevalence is the proportion of individuals who have the disorder at a given point in time, ‘period’ prevalence measures the proportion of individuals who have the disorder during a specified period (e.g. one year), a ‘lifetime’ prevalence is the proportion of individuals in the population who have ever had the disorder.

What is the evidence on prevalence of bipolar disorder in children?

Moderate quality evidence finds the current prevalence of bipolar spectrum disorders in children is around 4%. Rates were higher in studies using broad diagnostic measures (8.6%), in older samples (8.3%), and in studies using lifetime rates (6.4%).

June 2020

Last updated at: 5:24 am, 23rd June 2020
To view documentation related to this topic download the files below
Fact Sheet Technical Commentary

NeuRA Libraries

Title Colour Legend:
Green - Topic summary is available.
Orange - Topic summary is being compiled.
Red - Topic summary has no current systematic review available.