lifetime prevalence
The proportion of individuals in a population who have experienced a psychiatric disorder at any point during their lifetime.
Full Definition
Lifetime prevalence represents the cumulative risk of developing a psychiatric disorder from birth to the time of assessment. This measure is particularly important in psychiatric epidemiology as it captures the full burden of mental illness across the lifespan. Unlike point or period prevalence, lifetime prevalence continues to increase with age as more individuals have the opportunity to develop disorders. It is commonly used in large-scale surveys like the National Comorbidity Survey and provides crucial data for understanding the overall impact of psychiatric conditions on populations.
Usage
Usage note: Always specify the time frame and population when reporting lifetime prevalence estimates.
In Context
- "The lifetime prevalence of major depressive disorder was estimated at 16.2% in the general population." — Research publication
- "Editors should verify that lifetime prevalence figures account for recall bias in retrospective surveys." — Editorial review