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On the basis of epidemiological survey findings, anxiety disorders are the most prevalent mental disorders around the world and are associated with significant comorbidity and morbidity. Such surveys rely on advances in psychiatric nosology and may also contribute usefully to revisions of the nosology. There are a number of questions at the intersection of psychiatric epidemiology and nosology. This review addresses the following: What is the prevalence of anxiety disorders and how do we best explain cross-national differences in prevalence estimates? What are the optimal diagnostic criteria for anxiety disorders, and how can epidemiological data shed light on this question? What are the comorbidities of anxiety disorders, and how do we best understand the high comorbidities seen in these conditions? What is the current treatment gap for anxiety disorders, and what are the implications of current understandings of psychiatric epidemiology and nosology for policy-making relevant to anxiety disorders? Here, we emphasize that anxiety disorders are the most prevalent of the psychiatric conditions, and that rather than merely contrasting cross-national prevalence in anxiety disorders, it is more productive to delineate cross-national themes that emerge about the epidemiology of these conditions. We discuss that optimizing diagnostic criteria for anxiety disorders is an iterative process to which epidemiological data can make a crucial contribution. Additionally, high comorbidity in anxiety disorders is not merely artefactual; it provides key opportunities to explore pathways to mental disorders and to intervene accordingly. Finally, work on the epidemiology and nosology of anxiety disorders has provided a number of important targets for mental health policy and for future integrative work to move between bench and bedside, as well as between clinic and community.

A new report from the King’s Fund entitled Bringing Together Physical and Mental Health: a New Frontier for Integrated Care not only reviews the case for integration, but also provides real practical examples of how it has been achieved. Importantly, the report describes both the barriers to and facilitators of its successful implementation on the basis of interviews of those involved. The barriers are many and not all will be overcome simply by colocation of services (colocation is not integration). They include deeply ingrained cultural factors in the workforce that reinforce division and the separate organisational and payment systems for physical and mental health care. Key facilitators to achievement of integration include strong leadership for change at both clinical and board level and a willingness to innovate in the relevant organisations. Policy developments in various countries, including the new models of care introduced by the National Health Service Five Year Forward View in England and the growth of accountable care organisations in the USA have the exciting potential to facilitate integration of physical and mental health care. However, this integration will only happen if psychiatrists and other professionals now actively engage with these developments and use them as opportunities to advocate for and lead new forms of collaborative or even integrated working. The idea of so-called parity of esteem for patients’ mental and physical health care, which has been successfully championed by the Royal College of Psychiatrists, has achieved considerable influence. Indeed, in England, the Health and Social Care Act 2012 created a new legal responsibility for the National Health Service to deliver parity of esteem between physical and mental health, something that the Government has pledged to achieve by 2020. However, interpretations of parity of esteem vary. One interpretation is simply for existing mental health services to be as well funded and provide as good care as existing physical health services. Although this interpretation is an important ambition, the report from the King’s Fund7 raises sights much higher than this ambition to a vision in which mental health care is not only as good as physical care is, but is also delivered as part of all health and care services. This challenge should be addressed and the opportunity seized if we are to repair the harm caused by 100 years of separation.

BackgroundTo promote clinical application of the Schedules for Clinical Assessment in Neuropsychiatry (SCAN) system a shorter version (the mini-SCAN) was devised. Its psychometric properties were unknown.AimsTo establish the validity and practical properties of the mini-SCAN.MethodOne hundred and six participants were interviewed twice, once with the SCAN and once with the mini-SCAN. The level of agreement was established for the categories: no disorder, affective disorders, anxiety disorders, non-affective psychotic disorders, affective psychotic disorders.ResultsThe mini-SCAN is a valid instrument. Most kappa values were around 0.90. Only for the class of affective psychotic disorders was the agreement moderate. Mean duration of the mini-SCAN interviews was 25 min shorter than the SCAN interviews. Participants and interviewers were generally satisfied with the interview format and questions.ConclusionsThe mini-SCAN can be used as a diagnostic instrument for clinical purposes and for clinical studies when the present episode is the focus of attention.

Neural, endocrine, and immune stress mediators are hypothesized to increase risks of diverse chronic diseases, including arthritis. Retrospective data from the World Mental Health Surveys (N=18,309) were employed to assess whether adult onset of arthritis was associated with childhood adversities and early onset psychological disorder. Cox proportional hazard models assessed the association of number of childhood adversities and the presence of early onset psychological disorder with arthritis age of onset. Controlling for age, sex, and early onset mental disorder, relative to persons with no childhood adversities, persons with two adversities had an increased risk of adult onset arthritis (hazard ratio=1.27, 95% CI=1.08, 1.50), while persons with three or more adversities had a higher risk (HR=1.44, CI=1.24, 1.67). Early onset depressive and/or anxiety disorder was associated with an increased risk of adult onset arthritis after controlling for childhood adversities (HR=1.43, CI=1.28, 1.61). Since psychosocial stressors may be broad spectrum risk factors that increase risks of diverse chronic conditions in later life (e.g. arthritis, heart disease, diabetes, asthma, and chronic pain), prospective studies of childhood psychosocial stressors may be most productive if multiple disease outcomes are assessed in the same study. Results from this study provide methodological guidance for future prospective studies of the relationship between childhood psychosocial stressors and subsequent risk of adult onset arthritis. These activities were supported by the United States National Institute of Mental Health (R01MH070884), the John D. and Catherine T. MacArthur Foundation, the Pfizer Foundation, the US Public Health Service (R13- MH066849, R01-MH069864, and R01 DA016558), the Fogarty International Center (FIRCA R01-TW006481). The Mexican National Comorbidity Survey (MNCS) is supported by The National Institute of Psychiatry Ramon de la Fuente (INPRFMDIES 4280) and by the National Council on Science and Technology (CONACyT-G30544- H). The Lebanese survey is supported by the Lebanese Ministry of Public Health, the WHO (Lebanon) and unrestricted grants from Janssen Cilag, Eli Lilly, GlaxoSmithKline, Roche, Novartis, Fogerty (R03 TW0006481). The ESEMeD project was funded by the European Commission (Contracts QLG5-1999-01042; SANCO 2004123), the Piedmont Region (Italy), Fondo de Investigación Sanitaria, Instituto de Salud Carlos III, Spain (FIS 00/0028), Ministerio de Ciencia y Tecnología, Spain (SAF 2000-158-CE), Departament de Salut, Generalitat de Catalunya, Spain. The World Mental Health Japan (WMHJ) Survey is supported by the Grant for Research on Psychiatric and Neurological Diseases and Mental Health (H13-SHOGAI-023, H14-TOKUBETSU-026, H16-KOKORO-013) from the Japan Ministry of Health, Labour and Welfare. The South Africa Stress and Health Study (SASH) is supported by the US National Institute of Mental Health (R01-MH059575). The Ukraine Comorbid Mental Disorders during Periods of Social Disruption (CMDPSD) study is funded by the US National Institute of Mental Health (RO1-MH61905). The US National Comorbidity Survey Replication (NCS-R) is supported by the National Institute of Mental Health (NIMH; U01- MH60u0) with supplemental support from the Robert Wood Johnson Foundation (RWJF; Grant 044780)