To present an overview of the World Health Organization World Mental Health (WMH) Survey Initiative. The discussion draws on knowledge gleaned from the authors' participation as principals in WMH. WMH has carried out community epidemiological surveys in more than two dozen countries with more than 200,000 completed interviews. Additional surveys are in progress. Clinical reappraisal studies embedded in WMH surveys have been used to develop imputation rules to adjust prevalence estimates for within- and between-country variation in accuracy. WMH interviews include detailed information about sub-threshold manifestations to address the problem of rigid categorical diagnoses not applying equally to all countries. Investigations are now underway of targeted substantive issues. Despite inevitable limitations imposed by existing diagnostic systems and variable expertise in participating countries, WMH has produced an unprecedented amount of high-quality data on the general population cross-national epidemiology of mental disorders. WMH collaborators are in thoughtful and subtle investigations of cross-national variation in validity of diagnostic assessments and a wide range of important substantive topics. Recognizing that WMH is not definitive, finally, insights from this round of surveys are being used to carry out methodological studies aimed at improving the quality of future investigations.

There is robust and consistent evidence from epidemiological studies showing that urban birth is associated with an increased risk of developing schizophrenia. Evidence suggests that this exposure may be associated with a sizeable proportion of cases. To date the candidate exposures underlying the urban birth risk factor have included infectious agents, low prenatal vitamin D, toxins associated with pollution, and stress. However, in general, the hypotheses proposed to explain the urban birth risk factor have been unsatisfying. In light of the general trend towards increasing urbanization, it is feasible that the attributable fraction of schizophrenia associated with urban birth may increase. The psychiatric research community should have a sense of urgency in exploring the mechanisms linking urban birth and risk of schizophrenia.

The European Study of the Epidemiology of Mental Disorders (ESEMeD) project is the first cross-national European survey to collect data on prevalence, risk factors, health-related quality of life and use of services associated with common mental disorders. Representative samples of the non-institutionalized populations of Belgium, France, Germany, Italy, the Netherlands and Spain were interviewed using the CIDI 3.0, totaling 21,425 adult individuals. There was important variation across countries in prevalence estimates of the disorders studied, with Belgium and France in the highest proportions and Italy and Spain the lowest. Comorbidity of mood and anxiety disorders was frequent in all countries. Use of services due to mental health is low in all European countries, but especially low in Italy. Remarkably, only about one in five participants with a mental disorder had consulted the health services in the prior year. We discuss about the possible explanations of cross-national differences in prevalence estimates of mental disorders, and some of the limitations of the data on alcohol abuse and dependence gathered in the study. We conclude that despite the advances in knowledge about determinants and treatment methods, the care of the mentally ill is rather limited in Europe.

The aim of this Editorial is to discuss depression as an important disorder for public health. The literature regarding epidemiology, consequences, adequacy of service delivery and prevention of depression is reviewed. Depression is a common disorder with high lifetime rates, particularly in women, and those experiencing social adversity. It is a major cause of disability, and causes death both by suicide and due to raised rates of physical disorders. Many cases are undiagnosed and treatment is often inadequate. Primary prevention is not yet easily feasible but secondary prevention by earlier recognition, public and professional education, can produce benefits. There is a need for public health programmes aimed at improving recognition, treatment, and reducing consequences.

With the development of community care, the number of National Health Service psychiatric beds in England has been reduced to between one-fifth and one-quarter of those provided in the mid-1950s. Psychiatric bed numbers are close to the irreducible minimum if they have not already reached it. The problems facing today's acute psychiatric admission wards include: poor design, maintenance and ambience; a lack of therapeutic and leisure activities for patients leading to inactivity and boredom; frequent incidents of aggression and low-level violence and problems with staffing. It is suggested that there are a number of underlying causes: First, there has been failure to plan inpatient services, or to define their role, as attention has focused on new developments in community care. Second, the reduction in bed numbers has led to a change in the casemix of inpatients with a concentration on admission wards of a more challenging group of patients. Third, admission ward environments are permeable to the adverse effects of local street life, including drug taking. After years of neglect, acute inpatient psychiatric services in England are now high on the UK Government agenda. The paper lists a number of national initiatives designed to improve their quality and safety. A recent review of qualitative research suggests that acute psychiatric wards in other countries face similar problems to those reported in England. It is suggested that there might be a need for joint action which might take the form either of international research about acute inpatient care or the development of international standards and a common quality improvement system.

The metamorphosis from an extensive mental hospital system of care, rooted in a culture and tradition of self-sufficiency and isolation, to the concept and practise of delivery of psychiatric care in general hospitals is described. The obstacles, psychological and practical, to be overcome in this change process are outlined. The place of the general hospital psychiatric unit in psychiatric and general medical care is outlined. Relevant matters of design and management are briefly explored.

Many studies have identified urban-rural differences in schizophrenia risk. The underlying cause(s) may hypothetically include toxic exposures, diet, infections, and selective migration. In a recent study, we concluded that some of the cause(s) responsible for the urban-rural differences in schizophrenia risk are rooted in families, but some might also be rooted in individuals. First, we describe temporality as a potential methodological pitfall within this line of research, then we review studies not subject to this pitfall, and finally, we describe why factors rooted in the family may solely explain the urban-rural differences. Although other potential explanations for these differences exist, we focus on this hypothesis as it has not previously been discussed in detail. To determine the cause(s) responsible for the urban-rural differences, we need direct measurements of genetic and/or environmental factors related to urban life.

The National Institute of Clinical Excellence (NICE) in the UK is responsible for producing evidence based guidelines for the treatment of most common illnesses, both physical and psychological. NICE uses a hierarchy of evidence, ranging from data from meta-analyses of randomised controlled trials (RCT's) at the apex, to the opinions of acknowledged experts at the bottom. The task of preparing guideline for depression involved us in performing clean meta-analyses of around 8,000 published RCTs of the treatment of this disorder. Where drug treatments were concerned we used three indicators of efficacy, as well as considering toxicity, tolerability and cost. We also distinguished between studies carried out in primary care, and studies in patients treated by the mental health services. We found it helpful to arrange our report in terms of a “stepped care” model, addressing the indications for patients being referred on for more specialised, and expensive, treatments. In the full guideline we included our doubts that depression was a homogenous clinical entity, and our awareness of the limitations of relying on randomised controlled trials (RCT's) as the only source of evidence. This Editorial summarises the content of the guideline on the treatment of depression and discusses how it was received and also what it did not say.

Starting from this issue of Epidemiologia e Psichiatria Sociale a new Section, called ABC of Methodology, will regularly cover methodological aspects related to the design, conduct, reporting and interpretation of clinical and epidemiological studies. We hope that these articles will help develop a more critical attitude towards research findings published in the international literature and, additionally, we wish to help promote the implementation of original research projects with higher standards in terms of design, conduct and reporting.

Aims – This article provides a brief review of recent cross-cultural research on personality traits at both individual and culture levels, highlighting the relevance of recent findings for psychiatry. Method – In most cultures around the world, personality traits can be clearly summarized by the five broad dimensions of the Five-Factor Model (FFM), which makes it feasible to compare cultures on personality and psychopathology. Results – Maturational patterns and sex differences in personality traits generally show cultural invariance, which generates the hypothesis that age of onset, clinical evolution, and sex differences in the prevalence of psychiatric disorders might follow similar universal patterns. The average personality profiles from 51 cultures show meaningful geographical distributions and associations with culture-level variables, but are clearly unrelated to national character stereotypes. Conclusions – Aggregate personality scores can potentially be related to epidemiological data on psychiatric disorders, and dimensional personality models have implications for psychiatric diagnosis and treatment around the world.

Declaration of Interest: This research was supported by the Intramural Research Program of the NIH, National Institute on Aging. Robert R. McCrae receives royalties from the Revised NEO Personality Inventory.

Given the relatively high attributable risks associated with urbanicity it is crucially important to learn more on how this exposure impacts on population risk for schizophrenia. Further elucidation of the environmental influences that currently go under the name of “urbanicity” therefore is a crucial step in unravelling the etiology of schizophrenia. In order to make the step from association to cause, a plausible mechanism detailing the pathway from impact of exposure to onset of psychotic symptoms is needed. This paper outlines possible avenues and clues to the identification of possible mechanisms and pathways. The focus is on mechanisms of gene-environment interaction in the context of both functional genetic polymorphisms and epigenetic variation.

This Editorial presents recent research on the transmission of depression across three generations and discusses the implications for improving detection, treatment and prevention and for identifying important subgroups for biological studies. It reports a case-control study of three generations at high or low risk for major depression. The first two generations were followed longitudinally for 20 years and were assessed blind to the clinical status of the other generations. Depression is highly familial across three generations. Over 60% of grandchildren (average age 12 yrs.) with two generations affected with depression already have some psychopathology. Anxiety disorders are usually the first presentation before puberty with an increase in depression in adolescents, especially among girls. New opportunities for early detection and treatment exist. Families with three generations affected with depression present a potentially important group for biological, genetic and neuroimaging studies.

The aim of the paper is to provide an overview of some of the most important issues faced by acute inpatient facilities in three Scandinavian countries, including reflections and critical remarks for discussion in this field. Information was drawn from scientific articles and official reports published in recent years, as well as the authors' own knowledge of acute facilities in their home countries. Acute inpatient facilities, including General Hospital Psychiatric Units (GHPUs), in all Scandinavian countries have several issues and problems in common, which include the organisation and capacity of acute services, the assessment of dangerousness and suicidality, the use of coercion and efforts to reduce coercion, the need to define and improve the quality of acute services, and the necessity to improve collaboration and continuity between acute services and other services. Although the emphasis some of these issues receive can vary across the three countries, Scandinavian mental health professionals (and policy makers) have begun to systematically share their experiences in developing a growing spirit of collaboration. Despite the role of welfare state and the deployment of substantial resources in Scandinavian countries, mental health practitioners are struggling to implement best practices in acute wards, to develop differentiated forms of acute services, and to reach the right balance and coordination between acute services and other services.

Background – Schizophrenia is a complex disease resulting from the interplay of genetic and environmental factors. However, psychiatric genetics and epidemiology have often worked as independent research fields. Aims – To review the evidence about the gene-environment interplay involved in the development of schizophrenia. Methods – Systematic review of medical and psychological databases. Results – On one hand, quantitative and molecular genetics showed high heritability for schizophrenia and identified genes likely to be involved in its pathophysiology. The strength of the association between candidate genes and schizophrenia is however modest, and the need for a more appropriate conceptualization of the genetic risk has been claimed. On the other hand, psychiatric epidemiology described several environmental factors liked with the onset or the course of schizophrenia. The observational nature of epidemiology, however, may hamper inference on causation. Gene-environment correlations and interactions influence the exposure and the vulnerability to the environment, respectively. Current findings suggest that gene-environment correlations and interactions may be common phenomena in the pathophysiology of schizophrenia. The consideration of gene-environment interplay may help to overcome many limitations of genetic and epidemiological studies in psychiatry and suggest innovative preventive and therapeutic strategies. Conclusions – Taking into account the complexity of schizophrenia pathophysiology, mental health genetics may provide a comprehensive and heuristic model of disease.

Declaration of Interest: none.

In the United Kingdom, the “Research Assessment Exercise” is used by central government as a way of distributing infra-structure funds to University departments to support research. Departments with the highest ratings get extra support, while departments with low ratings may have their existing support withdrawn. The paper describes an exercise aimed at improving the rating obtained by one such department.

Aim – This study examines the relationship between prenatal cocaine exposure and parent-reported child behavior problems at age 7 years. Methods – Data are from 407 African-American children (210 cocaine-exposed, 197 non-cocaine-exposed) enrolled prospectively at birth in a longitudinal study on the neurodevelopmental consequences of in utero exposure to cocaine. Prenatal cocaine exposure was assessed at delivery through maternal self-report and bioassays (maternal and infant urine and infant meconium). The Achenbach Child Behavior Checklist (CBCL), a measure of childhood externalizing and internalizing behavior problems, was completed by the child's current primary caregiver during an assessment visit scheduled when the child was seven years old. Results – Structural equation and GLM/GEE models disclosed no association linking prenatal cocaine exposure status or level of cocaine exposure to child behavior (CBCL Externalizing and Internalizing scores or the eight CBCL sub-scale scores). Conclusions – This evidence, based on standardized ratings by the current primary caregiver, fails to support hypothesized cocaine-associated behavioral problems in school-aged children with in utero cocaine exposure. A next step in this line of research is to secure standardized ratings from other informants (e.g., teachers, youth self-report).

Declaration of Interest: This research was conducted in the context of an ongoing longitudinal study funded by the National Institutes of Health National Institute on Drug Abuse (R01 DA 06556). Support was also provided by a NIDA career development award (K01 DA 16720), a NIDA research training award (T32 DA 07292), the General Clinical Research Center (MOI RR 16587), and the Health Foundation of South Florida.