Statistics about bipolar disorder
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Statistics About Bipolar Disorder
Prevalence of Bipolar Disorder in Adults
Global Prevalence Rates
Bipolar disorder (BD) affects approximately 1% of the adult population globally, with lifetime prevalence rates ranging from 0.5% to 1.1% in European countries . A meta-analysis of epidemiologic studies worldwide found a lifetime prevalence of 1.02% for the bipolar spectrum, with significant variation across geographic regions . The prevalence rates in Africa and Asia were less than half of those in North and South America .
Regional Variations
In China, the prevalence of BD is notably lower than in Western countries. A meta-analysis reported point, 12-month, and lifetime prevalence rates of 0.09%, 0.17%, and 0.11%, respectively . The prevalence of BD-I and BD-II in China was also low, with lifetime rates of 0.09% and 0.04%, respectively .
Trends Over Time
From 1990 to 2017, the global incidence of BD increased by 47.74%, and disability-adjusted life years (DALYs) increased by 54.4% . However, the age-standardized incidence rate (ASIR) and age-standardized DALYs rate (ASDR) showed only slight increases, indicating that the absolute burden of BD remains high .
Pediatric Bipolar Disorder
Controversy and Prevalence
Pediatric bipolar disorder (PBD) is a controversial diagnosis with varying reported prevalence rates. A highly cited meta-analysis suggested a global community prevalence of 1.8%, later updated to 3.9% Parry2020Van Meter2011Masters2022. However, narrative analyses argue that these rates are substantially lower, particularly in non-US samples, where rates often fall to zero when requiring concordance between adolescent and parent reports Parry2020Van Meter2011Chan2022.
Age of Onset
Bipolar disorder is very rare in childhood and rare in adolescence. Most hypomanic syndromes in adolescence do not progress to adult bipolar disorder Parry2020Van Meter2011. The age of first onset is most frequently reported in late adolescence and early adulthood .
Bipolar Disorder in Perinatal Women
Prevalence and Risk
In perinatal women, the prevalence of BD is 2.6%, with bipolar-spectrum mood episodes occurring in 20.1% of women during pregnancy and the postpartum period . Women with a prior BD diagnosis have a 54.9% chance of experiencing at least one bipolar-spectrum mood episode during the perinatal period .
Conclusion
Bipolar disorder affects a significant portion of the global population, with prevalence rates varying by region and age group. While adult prevalence rates are relatively stable, pediatric bipolar disorder remains a contentious diagnosis with lower-than-claimed prevalence rates. The perinatal period is associated with a high risk of bipolar-spectrum mood episodes, highlighting the need for careful monitoring and management in this population.
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Most relevant research papers on this topic
Prevalence and burden of bipolar disorders in European countries.
Bipolar disorders have a prevalence of approximately 1% in European countries, with a high degree of comorbidity and impairments, similar to major depression and schizophrenia.
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