Objective – Epidemiological principles underpin much medical research particularly that concerned with the planning and evaluation of health services, including research in community and social psychiatry. The aim of this paper is to review some of the common uses of epidemiology in community psychiatric research and to discuss some methodological issues that arise frequently in epidemiological research in community settings. Methods – This is a review of the relevant literature and of the work currently in progress in the department of psychological medicine of the university of Wales College of Medicine. Results – Among the many uses of epidemiology in health care, four are especially relevant in community psychiatric settings: the assessment of the mental health needs of the population (four approaches are described: the collection of routine data, surveys of existing patients, surveys of the general population and statistical modelling), the identification of risk factors of disease, the contribution to prevention and the assessment of the clinical effectiveness of health care interventions. The most important methodological issues include causal inference which in epidemiology takes the form of explaining the association between an exposure and disease (chance, bias, confounding, reverse causality and causality), the issue of confounding and how to adjust for it and issues arising in the context of specific study designs. Conclusion – Epidemiology has become a set of methods used to investigate a wide range of clinical questions. Population based research is an essential part of clinical research but epidemiological knowledge is also needed by clinicians in order to critically appraise and interpret the scientific literature.

Objective – To describe a preliminary evaluation of a group CBT approach which has been fully integrated into the routine care for acute psychotic inpatients, admitted to a typically overburdened inner-city psychiatric general hospital unit. Design – The design is pre-post. A comparison of some indicators between the years preceding (1997) and following the beginning of the group therapy (1998) has been carried out. Setting – Psychiatric ward of S. Filippo Neri in Rome, in 1998. Method – The study compared the rate of rehospitalization, the rate of compulsory admission, the use of physical restraints, the episodes of violent behaviour and the escape from the ward. During the last three months of 1998 patients' satisfaction was also measured. Results – Overall 385 patients attended the group therapy, 79% of all inpatients in the period, with an average number of 4 sessions per patient. 59% of participants in the group in 1998 had a diagnosis of schizophrenia or paranoid disorder. The total compulsory admissions declined by 1/3 (p>0.001), the «revolving door» patients declined by 1/3 (p<0.05), compulsory admissions in «revolving door» patients declined by 3/4 (p<0.005), violent episodes by almost half (p<0.001), physical restraints and patients escape from the ward almost disappeared. Patients' opinion about the participation to the group was excellent. Conclusions – It is likely, but not sure, that the improvements were directly attributable to the introduction of the group treatment. Moreover, the group was clearly found to be useful by the majority of the participants. Some asked for further help of this type on discharge. These preliminary results are promising and make us confident they will act as stimuli for other colleagues to implement and evaluate this approach in other settings.

Objective – The aim of the study was to investigate the attitudes in the decision making process for admitting patients compulsorily under the Italian Law 180/78. Setting – A group of psychiatrists (n=81) working in the area of Cagliari (Sardinia, Italy). Main outcome measures – Three case–vignettes describing different hypothetical clinical situations: 1) a man with depression and psychotic symptoms; 2) a woman with a possible first episode of psychosis; and 3) a man with a history of substance abuse and bipolar disorder. Each vignette was followed by a list of 11 factors reported in the literature as important in the decision to admit compulsorily (current mental state, severity of the disease, dangerousness to self or others, psychiatric history, likely response of the mental state to the medical treatment, age and gender of the patient, owning a home, occupational status, social support available). Psychiatrists were asked: a) whether they would admit the patient compulsorily; and b) to rate 11 factors from the most to the least important in their decision.

Based on the findings of previous studies carried out by our group, which will be briefly summarised, the present paper puts forward several hypotheses to account for the evolution of depressive symptoms and the possible increase observed in risk of depression subsequent to social changes. The particular mood disorders presented by Senegalese emigrants and several protective factors which appear to determine a low risk in these populations, such as a strong social support, will be examined. Based on a previous investigation carried out by our group, which seems to indicate the presence of depressive pictures among poorly westernised populations such as the Peul nomads or Dogon farmers from the Sub-Saharian regions, the hypothesis that “westernalisation” (considered as the loss at an individual level of traditional ways of life, working habits, cultural patterns and languages in favour of different attitudes influenced by western culture) may represent a risk factor for depressive illness, in its clinical expressions commonly observed in western contexts, has been considered. In these populations, with the exception of educated individuals, the albeit rare depressive symptoms appear to be secondary to serious somatic disorders. Research performed identified two well-defined means of clinical expression, which has been termed, respectively, “western style” or “guilty” and “traditional” or “dislocation from the group”. Further studies carried out in rapidly changing areas seem to indicate how environmental factors are able to influence the evolution of depressive symptoms from the first form to the latter and to modify the threshold of onset of emotive, behavioural and depressive patterns. It has been hypothesised that rapid changes in the social organisation tend to exacerbate attitudes of “compulsive hyper-responsibilisation”, a cognitive set of basic assumptions which may be considered at the same time both as a product of “westernalization” at an individual level and a risk factor for depression. Individuals who possess these basic characteristics, subsequent to the opportunities afforded by the social changes, tend to develop new complex systems of interpreting reality, causality, controlling of events and ways of expressing emotions. Accordingly, we herewith propose a reviewal of the entire threshold concept and provide a means of interpreting the transformation in depressive phenomena in view of the fact that, although the new levels of knowledge and learning better equip subjects to face the new situations, they also render them more vulnerable to depression.