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The lifetime prevalence of a condition refers to the percentage of the population that develops that specific problem at any point during their lives. This epidemiological metric is highly valuable to researchers investigating the causes and correlates of disorders, as well as to clinicians and policymakers who must understand exactly how common these conditions are to allocate resources effectively.

Lifetime Prevalence Rate

The National Comorbidity Survey is a large-scale mental health study conducted in the United States that utilizes structured interviews to estimate the prevalence of psychological disorders. Data collected from nearly $$10,000$$ adults between $$2002$$ and $$2003$$ revealed varying lifetime prevalence rates for different conditions, including major depressive disorder ($$16.9\%$$), alcohol abuse ($$13.2\%$$), drug abuse ($$8.0\%$$), generalized anxiety disorder ($$5.7\%$$), bipolar disorder ($$4.4\%$$), and obsessive-compulsive disorder ($$2.3\%$$). These comprehensive statistics provide crucial insights that help identify statistical relationships among disorders and other contributing factors, serving the needs of basic researchers, clinicians, and policymakers.

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