Catherine Winsper1, Ayten Bilgin2, Andrew Thompson3, Steven Marwaha4, Andrew M Chanen5, Swaran P Singh6, Ariel Wang7, Vivek Furtado8. 1. Grant Writer and Honorary Research Fellow, Centre for Mental Health and Wellbeing Research, Warwick Medical School, University of Warwick; and Research and Innovation Department, Caludon Centre, Coventry and Warwickshire Partnership Trust, UK. 2. Psychology Department, Istanbul Medeniyet University, Turkey. 3. Principal Research Fellow, Orygen, The National Centre of Excellence in Youth Mental Health, The University of Melbourne, Australia; and Warwick Medical School, University of Warwick, UK. 4. Professor of Psychiatry, Institute for Mental Health, Birmingham University; and the Barberry, National Centre for Mental Health, UK. 5. Professorial Fellow and Head of Personality Disorder Research, Orygen, The National Centre of Excellence in Youth Mental Health; and Centre for Youth Mental Health, The University of Melbourne, Australia. 6. Professor and Director of the Centre for Mental Health and Wellbeing Research, Centre for Mental Health and Wellbeing Research, University of Warwick, UK. 7. PhD student, Division of Mental Health and Wellbeing, Warwick Medical School, University of Warwick, UK. 8. Associate Clinical Professor of Forensic Psychiatry, Division of Mental Health and Wellbeing, Warwick Medical School, University of Warwick, UK.
Abstract
BACKGROUND: Personality disorders are now internationally recognised as a mental health priority. Nevertheless, there are no systematic reviews examining the global prevalence of personality disorders. AIMS: To calculate the worldwide prevalence of personality disorders and examine whether rates vary between high-income countries and low- and middle-income countries (LMICs). METHOD: We systematically searched PsycINFO, MEDLINE, EMBASE and PubMed from January 1980 to May 2018 to identify articles reporting personality disorder prevalence rates in community populations (PROSPERO registration number: CRD42017065094). RESULTS: A total of 46 studies (from 21 different countries spanning 6 continents) satisfied inclusion criteria. The worldwide pooled prevalence of any personality disorder was 7.8% (95% CI 6.1-9.5). Rates were greater in high-income countries (9.6%, 95% CI 7.9-11.3%) compared with LMICs (4.3%, 95% CI 2.6-6.1%). In univariate meta-regressions, significant heterogeneity was partly attributable to study design (two-stage v. one-stage assessment), county income (high-income countries v. LMICs) and interview administration (clinician v. trained graduate). In multiple meta-regression analysis, study design remained a significant predictor of heterogeneity. Global rates of cluster A, B and C personality disorders were 3.8% (95% CI 3.2, 4.4%), 2.8% (1.6, 3.7%) and 5.0% (4.2, 5.9%). CONCLUSIONS: Personality disorders are prevalent globally. Nevertheless, pooled prevalence rates should be interpreted with caution due to high levels of heterogeneity. More large-scale studies with standardised methodologies are now needed to increase our understanding of population needs and regional variations.
BACKGROUND:Personality disorders are now internationally recognised as a mental health priority. Nevertheless, there are no systematic reviews examining the global prevalence of personality disorders. AIMS: To calculate the worldwide prevalence of personality disorders and examine whether rates vary between high-income countries and low- and middle-income countries (LMICs). METHOD: We systematically searched PsycINFO, MEDLINE, EMBASE and PubMed from January 1980 to May 2018 to identify articles reporting personality disorder prevalence rates in community populations (PROSPERO registration number: CRD42017065094). RESULTS: A total of 46 studies (from 21 different countries spanning 6 continents) satisfied inclusion criteria. The worldwide pooled prevalence of any personality disorder was 7.8% (95% CI 6.1-9.5). Rates were greater in high-income countries (9.6%, 95% CI 7.9-11.3%) compared with LMICs (4.3%, 95% CI 2.6-6.1%). In univariate meta-regressions, significant heterogeneity was partly attributable to study design (two-stage v. one-stage assessment), county income (high-income countries v. LMICs) and interview administration (clinician v. trained graduate). In multiple meta-regression analysis, study design remained a significant predictor of heterogeneity. Global rates of cluster A, B and C personality disorders were 3.8% (95% CI 3.2, 4.4%), 2.8% (1.6, 3.7%) and 5.0% (4.2, 5.9%). CONCLUSIONS:Personality disorders are prevalent globally. Nevertheless, pooled prevalence rates should be interpreted with caution due to high levels of heterogeneity. More large-scale studies with standardised methodologies are now needed to increase our understanding of population needs and regional variations.
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