Ethnicity in psychiatric epidemiology: need for precision

Research on mental disorders and their care in immigrant populations: a review of publications from Germany, Italy and the UK

Objective

The review aims to identify the extent and nature of research on mental disorders and their care in immigrant populations in three major European countries with high levels of immigration, i.e. Germany, Italy, United Kingdom (UK).

Methods

Peer-reviewed publications on the subject from the three countries between 1996 and 2004 were analyzed. The research questions addressed, the methods used, and the results obtained were assessed.

Results

Thirteen papers reporting empirical studies were found from Germany, four from Italy and 95 from the UK. Studies addressed a range of research questions and most frequently assessed rates of service utilization in different immigrant groups. The most consistent finding is a higher rate of hospital admissions for Afro-Caribbean patients in the UK. Many studies had serious methodological shortcomings with low sample sizes and unspecified inclusion criteria.

Discussion

Despite large scale immigration in each of the three studied countries, the numbers of relevant research publications vary greatly with a relatively high level of empirical research in the UK. Possible reasons for this are a generally stronger culture of mental health service research and a higher number of researchers who are themselves from immigrant backgrounds in the UK.

Conclusion

Overall the evidence base to guide the development of mental health services for immigrant populations appears limited. Future research requires appropriate funding, should be of sufficient methodological quality and may benefit from collaboration across Europe.

Race, ethnicity, and the duration of untreated psychosis: a systematic review

PURPOSE

An extended duration of untreated psychosis (DUP) is associated with poor outcome in first-episode psychosis (FEP). Some have suggested that minority ethnic groups have longer treatment delays, and this could lead to worse outcomes. We systematically reviewed the literature on racial and ethnic differences in DUP in patients with FEP.

METHODS

We searched electronic databases and conducted forward and backward tracking to identify studies that had compared DUP for people with FEP from different racial or ethnic groups.

RESULTS

We identified ten papers that reported on the association between race or ethnicity and DUP. Overall, these studies did not find evidence of differences between groups; however, three of ten studies suggested that Black patients generally, and Black-African patients specifically, may have a shorter DUP relative to White patients. There were methodological limitations in most studies with respect to ethnicity classification, sample size, and adjustment for potential confounders.

CONCLUSION

Racial and ethnic differences in DUP were rarely found. This could reflect that DUP does not differ between groups, or may reflect the methodological limitations of prior research. Studies that are designed and powered to examine these differences in treatment delay are needed to determine whether there are differences in DUP for minority groups.

Compulsory admissions of emergency psychiatric inpatients in Turin: the role of diagnosis

Many studies have found high levels of compulsory admission (CA) among non-affective psychoses. Aims of the present study were to investigate whether there was a mere association between diagnosis and CA in a cohort of 848 patients referring to a Psychiatric Emergency Service in a catchment area in Turin during a 2-year period, independent of socio-demographic features, psychiatric history, and clinical status. Diagnosis as a risk factor for CA was assessed constructing a logistic regression model, using the following steps: first, assessing the association between diagnoses and CA, without controlling for confounding factors; second, entering socio-demographic factors; third, entering socio-demographic factors and psychiatric history; and fourth, entering socio-demographic, psychiatric history, and aspects of clinical presentation into the model. At step 1 patients with Non Affective Psychoses, Mania and Personality Disorders had a significantly higher CA risk, compared to patients with Depressive Disorders. At step 4 diagnosis was no longer associated with CA. History of CAs within past 5years and Brief Psychiatric Rating Scale (BPRS) hostile-suspiciousness were positively associated with CA. Length of illness, history of previous suicidal attempts and BPRS anxiety-depression were negatively associated with CA. Overall, the percentage of correctly predicted cases was 39.8%. The remaining 60% can be explained by inherent variability or unknown, lurking variables. Finally, the study was carried out at a single facility. Much of the increased CA likelihood in diagnostic categories might be attributable to specific symptom patterns, not to patients' severity of illness or diagnosis per se.

Ethnic factors in mental health service utilisation among people with intellectual disability in high-income countries: systematic review

BACKGROUND

An emerging literature suggests that ethnic and cultural factors influence service utilisation among people with intellectual disability (ID), but this has not previously been reviewed.

AIMS

To investigate possible ethnic variation in uptake of mental health services in children, adolescents and adults with ID in high-income countries.

METHOD

A systematic review using main databases of studies that consider ethnic influences on mental health utilisation of people with ID. Methodological quality of studies was assessed.

RESULTS

Nine studies that reached selection criteria were identified. Six studies that compared two or more ethnic groups found a variation in levels of mental health service utilisation. The most consistent finding was that South Asian children, adolescents and adults with ID in the UK had lower use of mental health services than White British comparison groups.

CONCLUSION

Ethnic influences on mental health service utilisation were identified. Understanding their significance and potential negative consequences requires further investigation.

Predictors of compulsory admission in schizophrenia-spectrum patients: excitement, insight, emotion perception

PURPOSE

We explored socio-demographic and clinical variables associated with compulsory admissions (CA) compared with voluntary admissions in schizophrenia-spectrum patients; moreover, we investigated the ability of excitement, emotion perception, and lack of insight to predict CA.

METHODS

119 consecutive schizophrenia-spectrum patients admitted to the Servizio Psichiatrico di Diagnosi e Cura (SPDC = PES = psychiatric emergency service) of the Department of Neuroscience and Mental Health-San Giovanni Battista Hospital of Turin in the period between December 2007 and December 2009 were enrolled in the study. A backward stepwise logistic regression was used to test factors contributing to CA.

RESULTS

CA rate in our sample was 28.5%. Previous CAs, drop-out, severity of illness, positive symptoms, excitement, emotion perception, and insight were significantly different in CA patients compared to voluntary ones. After backward selection of variables, three variables predicted CA in our sample: excitement, impaired emotion perception and lesser insight. Finally, the effect of excitement on CA status seemed partially mediated by emotion perception, the prediction model accounting for 53.8% of the variance of CA status. Conversely, insight seemed not to be a mediator of excitement on CA.

IMPLICATIONS

Understanding CA patterns in special populations represents a first step towards improving clinical decision-making and developing appropriate interventions and service-provision.

Ethnicity and coercion among involuntarily detained psychiatric in-patients

We assessed whether adult Black and minority ethnic (BME) patients detained for involuntary psychiatric treatment experienced more coercion than similar White patients. We found no evidence of this from patient interviews or from hospital records. The area (mental health trust) where people were treated was strongly associated with both the experience of coercion and the recording of a coercive measure in their records. Regarding charges of institutional racism in psychiatry, this study highlights the importance of investigating the role of area characteristics when assessing the relationship between ethnicity and patient management.

Ethnicity as a variable in mental health research: a systematic review of articles published 1990-2004

The objective of the study was to investigate how the ethnic variable has been used in mental health research, in theory, in measurement and classification criteria. Journal articles published 1990-2004 that address original research on psychopathology, treatment and mental health services and with "ethnic" or "ethnicity" in their title or abstract were selected. The papers were examined for their theoretical definition of ethnicity, how the ethnic data were collected and the criteria used to identify ethnic groups. The use of comparison groups and country of the studies were recorded. A total of 421 papers were identified. An explicit theoretical definition was found in 33 (7.8%) papers. Data collection procedure was mentioned in 248 (58.9%) and 104 (24.7%) papers described how data was converted into ethnic groups. The operationalizations of ethnicity have remained almost unchanged during the 15-year review period. Generally, the ethnic variable was incompletely reported. Confusion regarding which individual or social characteristics ethnicity refers to makes the research findings of limited value in clinical settings, and may continue to create misunderstanding about the effect of ethnicity in clinical contexts.

Epidemiological studies on mental health needs of Asian population in New Zealand

BACKGROUND

New Zealand has recently experienced a massive and rapid influx of Asian migrants. The Asian population has doubled in 10 years and is now the third-largest ethnic group.

MATERIALS

Databases reviewed include Medline, NZ government reports and NZ media releases.

DISCUSSION

Despite the significant growth in the Asian population, most of whom are in a vulnerable age group for mental morbidity and are exposed to adverse experiences, accurate and systematically obtained information on the mental health of Asians is lacking.

CONCLUSION

This paper argues for a need to conduct a well-designed epidemiological study on the mental health needs of Asians in New Zealand. Recommendations on how to pursue this epidemiological study are provided.

Ethnicity, goal striving and schizophrenia: a case-control study of three ethnic groups in the United Kingdom

BACKGROUND

The need to achieve is common to all societies, and failure to do so may have a highly detrimental psychological impact. For those on the margins of mainstream society, especially migrants or descendants of migrants, the impact of failed or poor achievements may increase their vulnerability to mental illness.

AIMS

In a prospective study of schizophrenia in three ethnic groups (White, Indian and African-Caribbean) we studied the impact of goal striving and investigated whether the gap between the poor achievement and the high aspirations of members of some minority ethnic groups was potentially a factor contributing to the development of the illness.

METHODS

The patients and age- and sex-matched controls from their respective communities were asked to rate their perceived current levels of achievement and their past and future expectations in five domains--social standing, housing, education, employment and financial status on a 10-point scale.

RESULTS

The control subjects from the three ethnic groups scored similarly in most areas, supporting the validity of inter-ethnic comparisons. The gap between achievement and expectations did not appear to cause high disappointment levels in any group, and in fact only in the domain of housing did the African-Caribbean patients assess their current achievement as being significantly lower than that of their matched controls.

CONCLUSIONS

Poor housing conditions may be one of the risk factors contributing to the high incidence of schizophrenia in African-Caribbeans.

Negative pathways to psychiatric care and ethnicity: the bridge between social science and psychiatry

It has been consistently reported that the African-Caribbean population in the UK are more likely than their White counterparts to access psychiatric services via the police and under compulsion. The reasons for these differences are poorly understood. This paper comprises two main parts. The first provides a comprehensive review of research in this area, arguing the current lack of understanding stems from a number of methodological limitations that characterise the research to date. The issue of ethnic variations in pathways to psychiatric care has been studied almost exclusively within a medical epidemiological framework, and the potential insights offered by sociological and anthropological research in the fields of illness behaviour and health service use have been ignored. This has important implications as the failure of research to move beyond enumerating differences in sources of referral to psychiatric services and rates of compulsory admission means no recommendations for policy or service reform have been developed from the research. The second part of the paper sets out the foundations for future research, arguing that the pathway to care has to be studied as a social process subject to a wide range of influences, including the cultural context within which illness is experienced. It is further argued that Kleinman's (Patients and healers in the context of culture: an exploration of the borderland between anthropology, medicine and psychiatry, University of California Press, Los Angeles, 1980) Health Care System model offers a particularly valuable preliminary framework for organising and interpreting future research. It is only through gaining a more qualitative understanding of the processes at work in shaping different responses to mental illness and interactions with mental health services that the patterns observed in quantitative studies can be fully understood. This further reflects the need for a bridge between the social sciences and psychiatry if services are to be developed to respond to the increasing diversity of modern societies.

Beyond risk theory: suicidal behavior in its social and epidemiological context

The effect of exposure to risk factors for suicidal behavior varies from place to place and from period to period. This may be due to contextual influences, which arise if individuals' suicide risk depends not only on their personal exposure to risk or protective factors, but also on how these are distributed in their social, cultural, economic, or even physical environments. There has been relatively little explicit attention in suicide research for such contextual influences even though they are an important component of the cross-level bias, which can arise when aggregate level associations are assumed to also apply in individuals and vice versa. Contextual effects are conceptually related to the issues of social selection vs. causation, population density, and network effects. Because of a lack of prospective multilevel research, it is unclear exactly which mechanisms underlie the phenomenon that the distribution of risk factors in an individual's context may affect their suicide risk above and beyond their personal exposure. A number of mechanisms, like deviancy amplification, formalization of restraints, and buffering effects of social support are proposed. Contextual effects may result in a concentration of suicide risk in persons when the risk factors they are exposed to become rare--whether spontaneously or through focused prevention. This has important but mostly overlooked implications for population-based prevention strategies.

Are we meeting the psychological needs of Black African HIV-positive individuals in London? Controlled study of referrals to a psychological medicine unit

The changing pattern of HIV infection in the UK includes an increase in the number of infections acquired as a result of heterosexual contact and Black African individuals represent a sizeable proportion of those affected. In most UK centres for the treatment of HIV infection, clinicians have limited experience in caring for Black African patients, and there is a dearth of information about the recognition and management of mental health problems in this patient group. In this investigation the proportion of Black African individuals looked after in a large centre for the care of HIV infection in London was compared with the proportion of such patients referred for specialist mental health help, the results revealing that Black Africans were almost three times less likely to be referred for specialist mental health care. A case control investigation of those referred to mental health services showed that Black Africans were more likely to be suffering from AIDS at the time of referral, be referred for assessment of possible organic brain disease, and more likely to be found to be suffering from major depression or organic brain disease. Reasons for the lesser likelihood of referral to the mental health service are considered, including the possible failure of staff to recognize psychological morbidity in Black Africans, or reluctance and fear on the part of patients to be referred to services that may be perceived as threatening.

Responsibility and education

Ethical assumptions of psychiatry training and practice in a postmodern society, and of values and their linked beliefs have become important to search for and to acquire if a psychiatrist is to work in an informed, safe and helpful manner. These educational themes have particularly impacted on mental health services in the past 12 months and are reflected in the publications, including several editorials, reviewed. It is unsurprising that this literature is not evidence based in a restricted sense; but instead the area reviewed is within the field of opinion, purpose of regulatory bodies, and the influence of the public through user groups and the ballot box.

The characteristics of Indian subcontinent origin elders newly referred to a psychogeriatric service

BACKGROUND

The ethnic elderly population in the United Kingdom is increasing. Clinical, social and demographic characteristics of ethnic elders referred to and utilizing psychogeriatric services are unknown. Thus, this study was designed to compare these characteristics between Indian subcontinent origin ethnic elders and indigenous elders newly referred to a psychogeriatric service.

METHOD

All new referrals to a psychogeriatric service over a 2-year period were examined. Clinical, social and demographic characteristics of Indian subcontinent origin ethnic elders were compared with those of indigenous elders.

RESULTS

Ethnic elders were younger, had more children, had more people living in their household, were more likely to be married, were less likely to live alone, were more likely to have schizophrenia and less likely to have dementia. There were no differences between the two groups with regard to use of almost all health and social services resources at the time of the referral and after the initial assessment.

CONCLUSIONS

These findings do not support the traditional view that ethnic elders do not adequately access psychogeriatric and social services and that they are primarily cared for by extended families.