4.3 Article

Global, regional, and national burden of 12 mental disorders in 204 countries and territories, 1990-2019: a systematic analysis for the Global Burden of Disease Study 2019

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LANCET PSYCHIATRY
卷 9, 期 2, 页码 137-150

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ELSEVIER SCI LTD
DOI: 10.1016/S2215-0366(21)00395-3

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  1. Bill & Melinda Gates Foundation
  2. Australian National Health and Medical Research Council
  3. Queensland Department of Health, Australia

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The Global Burden of Diseases Study in 2019 showed that mental disorders remained among the top ten leading causes of burden worldwide, with no reduction in burden since 1990. The majority of the burden in disability-adjusted life-years (DALYs) came from years lived with disability (YLDs).
Background The mental disorders included in the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 were depressive disorders, anxiety disorders, bipolar disorder, schizophrenia, autism spectrum disorders, conduct disorder, attention-deficit hyperactivity disorder, eating disorders, idiopathic developmental intellectual disability, and a residual category of other mental disorders. We aimed to measure the global, regional, and national prevalence, disability-adjusted life-years (DALYS), years lived with disability (YLDs), and years of life lost (YLLs) for mental disorders from 1990 to 2019. Methods In this study, we assessed prevalence and burden estimates from GBD 2019 for 12 mental disorders, males and females, 23 age groups, 204 countries and territories, between 1990 and 2019. DALYs were estimated as the sum of YLDs and YLLs to premature mortality. We systematically reviewed PsycINFO, Embase, PubMed, and the Global Health Data Exchange to obtain data on prevalence, incidence, remission, duration, severity, and excess mortality for each mental disorder. These data informed a Bayesian meta-regression analysis to estimate prevalence by disorder, age, sex, year, and location. Prevalence was multiplied by corresponding disability weights to estimate YLDs. Cause specific deaths were compiled from mortality surveillance databases. The Cause of Death Ensemble modelling strategy was used to estimate death rate by age, sex, year, and location. The death rates were multiplied by the years of life expected to be remaining at death based on a normative life expectancy to estimate YLLs. Deaths and YLLs could be calculated only for anorexia nervosa and bulimia nervosa, since these were the only mental disorders identified as underlying causes of death in GBD 2019. Findings Between 1990 and 2019, the global number of DALYs due to mental disorders increased from 80middot8 million (95% uncertainty interval [UI] 59middot5-105middot9) to 125middot3 million (93middot0-163middot2), and the proportion of global DALYs attributed to mental disorders increased from 3middot1% (95% UI 2middot4-3middot9) to 4middot9% (3middot9-6middot1). Age-standardised DALY rates remained largely consistent between 1990 (1581middot2 DALYs [1170middot9-2061middot4] per 100 000 people) and 2019 (1566middot2 DALYs [1160middot1-2042middot8] per 100 000 people). YLDs contributed to most of the mental disorder burden, with 125middot3 million YLDs (95% UI 93middot0-163middot2; 14middot6% [12middot2-16middot8] of global YLDs) in 2019 attributable to mental disorders. Eating disorders accounted for 17 361middot5 YLLs (95% UI 15 518middot5-21 459middot8). Globally, the age-standardised DALY rate for mental disorders was 1426middot5 (95% UI 1056middot4-1869middot5) per 100 000 population among males and 1703middot3 (1261middot5-2237middot8) per 100 000 population among females. Age-standardised DALY rates were highest in Australasia, Tropical Latin America, and high-income North America. Interpretation GBD 2019 showed that mental disorders remained among the top ten leading causes of burden worldwide, with no evidence of global reduction in the burden since 1990. The estimated YLLs for mental disorders were extremely low and do not reflect premature mortality in individuals with mental disorders. Research to establish causal pathways between mental disorders and other fatal health outcomes is recommended so that this may be addressed within the GBD study. To reduce the burden of mental disorders, coordinated delivery of effective prevention and treatment programmes by governments and the global health community is imperative.

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