Psychiatric morbidity among West Africans and West Indians living in London

Review of Major Social Determinants of Health in Schizophrenia-Spectrum Disorders: II. Assessments

BACKGROUND AND AIMS

Social determinants of health (SDoHs) impact the development and course of schizophrenia-spectrum psychotic disorders (SSPDs). Yet, we found no published scholarly reviews of psychometric properties and pragmatic utility of SDoH assessments among people with SSPDs. We aim to review those aspects of SDoH assessments.

STUDY DESIGN

PsychInfo, PubMed, and Google Scholar databases were examined to obtain data on reliability, validity, administration process, strengths, and limitations of the measures for SDoHs identified in a paired scoping review.

STUDY RESULTS

SDoHs were assessed using different approaches including self-reports, interviews, rating scales, and review of public databases. Of the major SDoHs, early-life adversities, social disconnection, racism, social fragmentation, and food insecurity had measures with satisfactory psychometric properties. Internal consistency reliabilities-evaluated in the general population for 13 measures of early-life adversities, social disconnection, racism, social fragmentation, and food insecurity-ranged from poor to excellent (0.68-0.96). The number of items varied from 1 to more than 100 and administration time ranged from less than 5 minutes to over an hour. Measures of urbanicity, low socioeconomic status, immigration status, homelessness/housing instability, and incarceration were based on public records or targeted sampling.

CONCLUSIONS

Although the reported assessments of SDoHs show promise, there is a need to develop and test brief but validated screening measures suitable for clinical application. Novel assessment tools, including objective assessments at individual and community levels utilizing new technology, and sophisticated psychometric evaluations for reliability, validity, and sensitivity to change with effective interventions are recommended, and suggestions for training curricula are offered.

Nigerian and Ghanaian Young People's Experiences of Care for Common Mental Disorders in Inner London: Protocol for a Multimethod Investigation

BACKGROUND

The Care Quality Commission published a review in 2018 in England titled "Are We Listening," which revealed that child and adolescent mental health services are not responsive to the specific needs of young Black people and other ethnic minorities even in areas with ethnically diverse populations. It found that commissioners and service planners failed to engage with these young people and their families to understand their needs and expectations.

OBJECTIVE

The purpose of this study is to engage Nigerian and Ghanaian young people (NAGYP) with experiences of care for common mental disorders (CMDs) in London, to increase understanding of their needs, and to give voice to their views and preferences. Their parents', caregivers', and practitioners' views will also be sought for service improvement.

METHODS

Three combined contemporary complementary methodologies-thematic analysis, interpretative phenomenological analysis (IPA), and intersectionality-based policy analysis (IBPA)-will be used across 3 comprehensive phases. First, a scoping review where relevant themes will be critically analyzed will inform further phases of this study. Detailed mapping of community and mental health care services in 13 inner London boroughs to investigate what professionals actually do rather than what they say they do. Second, IBPA will be used to scrutinize improving access to psychological therapies and other legislations and policies relevant to NAGYP to undertake an intersectional multileveled analysis of power, models, and constraints. Third, IPA will "give voice" and "make sense" of NAGYP lived experiences of CMDs via a representative sample of NAGYP participants' (n=30) aged 16-25 years, parents or caregivers' (n=20), and practitioners' (n=20) perspectives will be captured.

RESULTS

The study has been approved by the UCL Institute of Education Research Ethics Committee (Z6364106/2022/02/28; health research) and University College London (Z6364106/2022/10/24; social research). Recruitment has begun in 13 inner boroughs of London. Data collection through observation, semistructured interviews, and focus groups are expected to be finalized by early 2024, and the study will be published by early 2025.

CONCLUSIONS

Combining multiple qualitative methodologies and methods will enable rigorous investigation into NAGYP's lived experiences of care received for CMDs in London. Findings from this study should enable a reduction in the negative connotations and harmful superstitions associated with mental health-related issues in this group, inform evidence-based interventions, and facilitate preventive or early access to interventions. There may also be an indirect impact on problems resulting from mental illness such as school dropout, antisocial behaviors, knife crimes, juvenile detention centers, and even death.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

PRR1-10.2196/42575.

Migration and psychosis: a meta-analysis of incidence studies

BACKGROUND

The aims of this meta-analysis are (i) to estimate the pooled relative risk (RR) of developing non-affective psychotic disorder (NAPD) and affective psychotic disorder (APD) among migrants and their children; (ii) to adjust these results for socioeconomic status (SES); (iii) to examine the sources of heterogeneity that underlie the risk of NAPD.

METHODS

We included population-based incidence studies that reported an age-adjusted RR with 95% confidence interval (CI) published 1 January 1977-12 October 2017 and used a random-effects model.

RESULTS

We retrieved studies performed in Europe (n = 43), Israel (n = 3), Canada (n = 2) and Australia (n = 1). The meta-analysis yielded a RR, adjusted for age and sex, of 2.13 (95% CI 1.99-2.27) for NAPD and 2.94 (95% CI 2.28-3.79) for APD. The RRs diminished, but persisted after adjustment for SES. With reference to NAPD: a personal or parental history of migration to Europe from countries outside Europe was associated with a higher RR (RR = 2.94, 95% CI 2.63-3.29) than migration within Europe (RR = 1.88, 95% 1.62-2.18). The corresponding RR was lower in Israel (RR = 1.22; 0.99-1.50) and Canada (RR = 1.21; 0.85-1.74). The RR was highest among individuals with a black skin colour (RR = 4.19, 95% CI 3.42-5.14). The evidence of a difference in risk between first and second generation was insufficient.

CONCLUSIONS

Positive selection may explain the low risk in Canada, while the change from exclusion to inclusion may do the same in Israel. Given the high risks among migrants from developing countries in Europe, social exclusion may have a pathogenic role.

Ethnic inequalities in the incidence of diagnosis of severe mental illness in England: a systematic review and new meta-analyses for non-affective and affective psychoses

PURPOSE

Although excess risks particularly for a diagnosis of schizophrenia have been identified for ethnic minority people in England and other contexts, we sought to identify and synthesise up-to-date evidence (2018) for affective in addition to non-affective psychoses by specific ethnic groups in England.

METHODS

Systematic review and meta-analysis of ethnic differences in diagnosed incidence of psychoses in England, searching nine databases for reviews (citing relevant studies up to 2009) and an updated search in three databases for studies between 2010 and 2018. Studies from both searches were combined in meta-analyses allowing coverage of more specific ethnic groups than previously.

RESULTS

We included 28 primary studies. Relative to the majority population, significantly higher risks of diagnosed schizophrenia were found in Black African (Relative risk, RR 5.72, 95% CI 3.87-8.46, n = 9); Black Caribbean (RR 5.20, 95% CI 4.33-6.24, n = 21); South Asian (RR 2.27, 95% CI 1.63-3.16, n = 14); White Other (RR 2.24, 95% CI 1.59-3.14, n = 9); and Mixed Ethnicity people (RR 2.24, 95% CI 1.32-3.80, n = 4). Significantly higher risks for diagnosed affective psychoses were also revealed: Black African (RR 4.07, 95% CI 2.27-7.28, n = 5); Black Caribbean (RR 2.91, 95% CI 1.78-4.74, n = 16); South Asian (RR 1.71, 95% CI 1.07-2.72, n = 8); White Other (RR 1.55, 95% CI 1.32-1.83, n = 5); Mixed Ethnicity (RR 6.16, 95% CI 3.99-9.52, n = 4).

CONCLUSIONS

The risk for a diagnosis of non-affective and affective psychoses is particularly elevated for Black ethnic groups, but is higher for all ethnic minority groups including those previously not assessed through meta-analyses (White Other, Mixed Ethnicity). This calls for further research on broader disadvantages affecting ethnic minority people.

African–Caribbeans and schizophrenia: contributing factors

The epidemiology and management of schizophrenia have been well studied over the past few decades. In the UK, key findings that have emerged time and again are the excess prevalence and incidence rates of schizophrenia among people of African–Caribbean origin. The reasons for this excess and the implications of this finding are many. The findings may reflect a true excess or a methodological artefact related to errors in the estimation of numerator and denominator data. The findings have been increasingly accepted as better designed studies have emerged, but these still do not fully address concerns about the nature of schizophrenia in other cultural groups and in societies in which industrialisation and economic productivity of the individual are not considered to be as crucial for an individual's sense of belonging in a community.

Mood disorders in first- and second-generation immigrants: systematic review and meta-analysis

BackgroundAlthough there are consistent reports of higher psychosis rates among immigrants, the information on mood disorders is limited.AimsTo review and quantify the difference in incidence of mood disorders in first- and second-generation immigrant (FGI and SGI) groups v. non-immigrants.MethodPubMed, EMBASE and PsycINFO were searched for articles from cohort studies reporting incidence of mood disorders among FGIs and SGIs.ResultsEighteen studies met our inclusion criteria. The summary relative risk (RR) for FGIs was 1.25 (95% CI 1.11-1.41), based on 17 effect sizes and 6120 cases, and 1.16 (95% CI 0.96-1.40) for SGIs based on three effect sizes. Men seemed at higher risk (RR = 1.29, 95% CI 1.06-1.56).ConclusionsClinicians should view FGIs as a group at risk of mood disorders, especially men. Further research is needed to understand immigrants' risk, especially in SGI.

Schizophrenia and other psychotic disorders in Caribbean-born migrants and their descendants in England: systematic review and meta-analysis of incidence rates, 1950-2013

PURPOSE

Increased risk of schizophrenia and other psychotic disorders among black Caribbean migrants and their descendants have been described since the 1960s. It remains unclear whether this risk varies over time, between rural and urban areas, or according to methodological artefact.

METHODS

We conducted a systematic review of the incidence of adult-onset psychotic disorders in black Caribbean groups relative to the baseline population in England, published 1950-2013. Subject to sufficient data (N ≥ 5) we used random effects meta-analyses to estimate pooled incidence rates (IR) and rate ratios (IRR) of seven psychotic disorder outcomes, and meta-regression to inspect whether any variation was attributable to study-level methodological features, including case ascertainment, denominator reliability, choice of baseline population and study quality.

RESULTS

Eighteen studies met inclusion for review. Sixteen demonstrated statistically significant elevated incidence rates in the black Caribbean group, present across all major psychotic disorders, including schizophrenia and bipolar disorder. Methodological quality increased over time (p = 0.01), but was not associated with estimated IR or IRR. For schizophrenia (N = 11 studies) the pooled IRR in the black Caribbean group was 4.7 (95 % CI 3.9-5.7) relative to the baseline; no evidence of publication bias was observed. We found weak evidence to suggest schizophrenia IRRs were smaller from studies in more urban settings (odds ratio 0.98; 95 % CI 0.96-1.00; p = 0.06).

CONCLUSIONS

Higher incidence rates of psychotic disorders have been present for more than 60 years amongst black Caribbean ethnic groups in England, despite improved study methodologies over time. Aetiological explanations appear to more parsimoniously account for this excess than methodological biases.

Incidence of schizophrenia and other psychoses in England, 1950-2009: a systematic review and meta-analyses

BACKGROUND

We conducted a systematic review of incidence rates in England over a sixty-year period to determine the extent to which rates varied along accepted (age, sex) and less-accepted epidemiological gradients (ethnicity, migration and place of birth and upbringing, time).

OBJECTIVES

To determine variation in incidence of several psychotic disorders as above.

DATA SOURCES

Published and grey literature searches (MEDLINE, PSycINFO, EMBASE, CINAHL, ASSIA, HMIC), and identification of unpublished data through bibliographic searches and author communication.

STUDY ELIGIBILITY CRITERIA

Published 1950-2009; conducted wholly or partially in England; original data on incidence of non-organic adult-onset psychosis or one or more factor(s) pertaining to incidence.

PARTICIPANTS

People, 16-64 years, with first -onset psychosis, including non-affective psychoses, schizophrenia, bipolar disorder, psychotic depression and substance-induced psychosis.

STUDY APPRAISAL AND SYNTHESIS METHODS

Title, abstract and full-text review by two independent raters to identify suitable citations. Data were extracted to a standardized extraction form. Descriptive appraisals of variation in rates, including tables and forest plots, and where suitable, random-effects meta-analyses and meta-regressions to test specific hypotheses; rate heterogeneity was assessed by the I²-statistic.

RESULTS

83 citations met inclusion. Pooled incidence of all psychoses (N = 9) was 31.7 per 100,000 person-years (95%CI: 24.6-40.9), 23.2 (95%CI: 18.3-29.5) for non-affective psychoses (N = 8), 15.2 (95%CI: 11.9-19.5) for schizophrenia (N = 15) and 12.4 (95%CI: 9.0-17.1) for affective psychoses (N = 7). This masked rate heterogeneity (I²: 0.54-0.97), possibly explained by socio-environmental factors; our review confirmed (via meta-regression) the typical age-sex interaction in psychosis risk, including secondary peak onset in women after 45 years. Rates of most disorders were elevated in several ethnic minority groups compared with the white (British) population. For example, for schizophrenia: black Caribbean (pooled RR: 5.6; 95%CI: 3.4-9.2; N = 5), black African (pooled RR: 4.7; 95%CI: 3.3-6.8; N = 5) and South Asian groups in England (pooled RR: 2.4; 95%CI: 1.3-4.5; N = 3). We found no evidence to support an overall change in the incidence of psychotic disorder over time, though diagnostic shifts (away from schizophrenia) were reported.

LIMITATIONS

Incidence studies were predominantly cross-sectional, limiting causal inference. Heterogeneity, while evidencing important variation, suggested pooled estimates require interpretation alongside our descriptive systematic results.

CONCLUSIONS AND IMPLICATIONS OF KEY FINDINGS

Incidence of psychotic disorders varied markedly by age, sex, place and migration status/ethnicity. Stable incidence over time, together with a robust socio-environmental epidemiology, provides a platform for developing prediction models for health service planning.

Elaboration on the association between immigration and schizophrenia: a population-based national study disaggregating annual trends, country of origin and sex over 15 years

PURPOSE

Generally, immigrant status and male sex are separately documented to increase the risk of schizophrenia; although population-based risk trends by sex and immigration over time have not been examined. This study aims to examine the extent to which immigration acts as a risk factor for schizophrenia, delineated by origin, sex and year, using national population-based data over 15 years.

METHOD

Data on all first psychiatric admissions from 1978 to 1992 (n = 10,892) from the National Psychiatric Hospitalization Case Registry of the State of Israel were merged with aggregate national data from the Israeli Central Bureau of Statistics.

RESULTS

Compared to native-born Israelis, people who migrated prior to the age of 15 (n = 2,335) were at a greater risk of schizophrenia (n = 8,557; RR = 1.6, 95% CI = 1.53; 1.68), particularly those from Far Eastern (RR = 2.43, 95% CI = 1.91; 3.1) and Caribbean and South American (RR = 1.94, 95% CI = 1.51; 2.51) countries. Aggregate risk was higher among female than male immigrants and over the 15-year study immigration-related risk declined across the sexes.

CONCLUSION

The current findings replicate past research showing that immigrants, particularly from a social minority, as suggested by the social defeat-hypothesis, are at an increased risk of schizophrenia, and extend past findings to show that risk at least in Israel has decreased with time irrespective of sex.

A meta-analysis of the risk for psychotic disorders among first- and second-generation immigrants

BACKGROUND

There is increasing acceptance of migration as a risk factor for schizophrenia and related disorders; however, the magnitude of the risk among second-generation immigrants (SGIs) remains unclear. Generational differences in the incidence of psychotic disorders among migrants might improve our understanding of the relationship between migration, ethnicity and psychotic disorders. This meta-analysis aimed at determining the risk of psychotic disorders among SGIs in comparison with non-migrants and first-generation immigrants (FGIs).

METHOD

Medline, EMBASE and PsycINFO databases were searched systematically for population-based studies on migration and psychotic disorders published between 1977 and 2008. We also contacted experts, tracked citations and screened bibliographies. All potential publications were screened by two independent reviewers in a threefold process. Studies were included in the meta-analysis if they reported incidence data, differentiated FGIs from SGIs and provided age-adjusted data. Data extraction and quality assessment were conducted for each study.

RESULTS

Twenty-one studies met all inclusion criteria. A meta-analysis of 61 effect sizes for FGIs and 28 for SGIs yielded mean-weighted incidence rate ratios (IRRs) of 2.3 [95% confidence interval (CI) 2.0-2.7] for FGIs and 2.1 (95% CI 1.8-2.5) for SGIs. There was no significant risk difference between generations, but there were significant differences according to ethno-racial status and host country.

CONCLUSIONS

The increased risk of schizophrenia and related disorders among immigrants clearly persists into the second generation, suggesting that post-migration factors play a more important role than pre-migration factors or migration per se. The observed variability suggests that the risk is mediated by the social context.

Mental health care and resistance to fascism

Mental health nurses have a critical stake in resisting the right-wing ideology of British fascism. Particularly concerning is the contemporary effort of the British National Party (BNP) to gain credibility and electoral support by the strategic re-packaging of a racist and divisive political manifesto. Evidence that some public sector workers are affiliated with the BNP has relevance for nursing at a series of levels, not least the incompatibility of party membership with a requirement of the Professional Code to avoid discrimination. Progressive advances, though, need to account for deep rooted institutionalized racism in the discourse and practice of healthcare services. The anomalous treatment of black people within mental health services, alongside racial abuse experienced by ethnic minority staff, is discussed in relation to the concept of race as a powerful social category and construction. The murder of the mentally ill and learning disabled in Nazi Germany, as an adjunct of racial genocide, is presented as an extreme example where professional ethics was undermined by dominant political ideology. Finally, the complicity of medical and nursing staff in the state sanctioned, bureaucratic, killing that characterized the Holocaust is revisited in the context of ethical repositioning for contemporary practice and praxis.

Psychological distress, depression and generalised anxiety in Turkish and Moroccan immigrants in Belgium: a general population study

BACKGROUND

This study assesses the prevalence of and risk and protective factors for common mental health complaints in a general population sample of Turkish and Moroccan immigrants living in Belgium. Focus is on between- and within-group variation.

METHODS

The study is based on pooled data from the Belgian Health Interview Surveys 2001 and 2004 and focuses on the Turkish and Moroccan immigrant population aged 18-65 (N = 147 Turks, N = 359 Moroccans). Mental health status is assessed with the General Health Questionnaire-12 and the Symptom Checklist 90-R subscales for depression and generalised anxiety. Risk and protective factors considered are gender, age, household type, labor market position, educational level, household income, homeownership, being foreign- or native born and social support.

RESULTS

Between-group variance was not significant. Within-group analysis showed significant effects of gender and social support. Although not significant, the results suggested positive associations between social adversity and mood status. In addition, there was a tendency for higher risks for psychological distress, depression and generalised anxiety in foreign-born as compared to Belgian-born Turkish and Moroccan immigrants.

Mood disorders and migration: meta-analysis

BACKGROUND

Migration is a risk factor for the development of schizophrenia.

AIMS

To examine whether migration is also a risk factor for bipolar affective disorder, unipolar depressive disorder and mood disorders in general.

METHOD

Medline was searched for population-based incidence studies concerning mood disorders among migrants and mean relative risks were computed using a mixed-effects statistical model.

RESULTS

Only a few studies of unipolar depressive disorder were retrieved. The mean relative risk of developing bipolar affective disorder among migrants was 2.47 (95% CI 1.33-4.59). However, after excluding people of African-Caribbean origin in the UK this risk was no longer significantly increased. The mean relative risk of mood disorders of unspecified polarity was 1.25 (95% CI 1.04-1.49) and that of any mood disorder was 1.38 (95% CI 1.17-1.62).

CONCLUSIONS

There is no conclusive evidence for a large increase in the risk of mood disorders associated with migration.

A systematic review of the incidence of schizophrenia: the distribution of rates and the influence of sex, urbanicity, migrant status and methodology

BACKGROUND

Understanding variations in the incidence of schizophrenia is a crucial step in unravelling the aetiology of this group of disorders. The aims of this review are to systematically identify studies related to the incidence of schizophrenia, to describe the key features of these studies, and to explore the distribution of rates derived from these studies.

METHODS

Studies with original data related to the incidence of schizophrenia (published 1965-2001) were identified via searching electronic databases, reviewing citations and writing to authors. These studies were divided into core studies, migrant studies, cohort studies and studies based on Other Special Groups. Between- and within-study filters were applied in order to identify discrete rates. Cumulative plots of these rates were made and these distributions were compared when the underlying rates were sorted according to sex, urbanicity, migrant status and various methodological features.

RESULTS

We identified 100 core studies, 24 migrant studies, 23 cohort studies and 14 studies based on Other Special Groups. These studies, which were drawn from 33 countries, generated a total of 1,458 rates. Based on discrete core data for persons (55 studies and 170 rates), the distribution of rates was asymmetric and had a median value (10%-90% quantile) of 15.2 (7.7-43.0) per 100,000. The distribution of rates was significantly higher in males compared to females; the male/female rate ratio median (10%-90% quantile) was 1.40 (0.9-2.4). Those studies conducted in urban versus mixed urban-rural catchment areas generated significantly higher rate distributions. The distribution of rates in migrants was significantly higher compared to native-born; the migrant/native-born rate ratio median (10%-90% quantile) was 4.6 (1.0-12.8). Apart from the finding that older studies reported higher rates, other study features were not associated with significantly different rate distributions (e.g. overall quality, methods related to case finding, diagnostic confirmation and criteria, the use of age-standardization and age range).

CONCLUSIONS

There is a wealth of data available on the incidence of schizophrenia. The width and skew of the rate distribution, and the significant impact of sex, urbanicity and migrant status on these distributions, indicate substantial variations in the incidence of schizophrenia.

Migration and mental health

OBJECTIVE

Migration and its accompanying stressors affect migrating individuals and their families. The process of migration is not simple or straightforward. The aim of this review is to distil existing information on how migration influences individuals' mental state and how it determines help seeking as well as pathways to care.

METHOD

The review relies on published studies in both MEDLINE and non-MEDLINE journals as well as relevant monographs. The search was employed using migration, ethnic communities, stress and other relevant words for purposes of the review.

RESULTS

The review provides a background on the typology of migration, its impact on communities as well as individuals. Furthermore, the relationship of mental illness to migration is explored and described. Future research plans are advocated in relationship with these findings.

CONCLUSION

Migration is and can be a very stress-inducing phenomenon. Yet not all migrants go through the same process. The clinician needs to be aware of coping strategies as well as resilience among migrants.

Ethnic disadvantage and schizophrenia

OBJECTIVE

To review and interpret epidemiologic research on ethnic disadvantage and schizophrenia.

METHOD

A search of the research literature was conducted.

RESULTS

Seventeen population-based studies were reported in the United Kingdom and the Netherlands from 1967 to 1997. The studies report high incidence rates for immigrants whose position in society is disadvantaged, than majority-group native-born, with a range of relative incidence from 1.7 to 13.2. It is proposed that the developmental task for formulating the life plan challenges the young adult's executive function abilities, which may be weaker in individuals vulnerable to schizophrenia. Formulating the life plan may be made more difficult by the position in society of disadvantaged ethnic minorities, raising the risk for schizophrenia.

CONCLUSION

Further research on executive function, and the developmental challenge of formulating the life plan, might provide insights into the etiology of schizophrenia, as well as suggest avenues for prevention.

The incidence of mania: time trends in relation to gender and ethnicity

In order to investigate conflicting reports about possible changes in the incidence of mania, we established first contact rates for mania in the defined area of Camberwell between 1965 and 1984. There was some evidence for an increase in the first contact rate of mania, especially in females. This rise may be associated with the influx into Camberwell of individuals of Afro-Caribbean origin who showed significantly higher rates than the white group [adjusted rate ratio 3.1; 95% confidence interval (CI) 1.4-6.9] and more often displayed mixed manic and schizophrenic symptomatology (risk ratio 2.2; 95% CI 1.1-4.3). We conclude that the incidence of mania has not decreased and may actually have increased. High rates of mental illness among members of ethnic minorities are not specific to schizophrenia, suggesting that a risk factor common to both manic and schizophrenic illness is more prevalent among these groups.

Retroviruses and schizophrenia in Jamaica

Reports of an 18-fold higher incidence of schizophrenia among second-generation Afro-Caribbeans, and especially Jamaican migrants in the United Kingdom were soon called "an epidemic of schizophrenia," with the inference that a novel virus, likely to be perinatally transmitted, was a possible etiological agent. This intriguing observation led us to explore a possible link with human T-cell lymphotropic virus type one (HTLV-I), because it is a virus that is endemic in the Caribbean Island, is perinatally transmitted, known to be neuropathogenic, and the cause of a chronic myelopathy (tropical spastic paraparesis/HTLV-I associated myelopathy. We therefore examined inpatients as the Bellevue Mental Hospital, Kingston, Jamaica and did standard serological tests for retroviruses HTLV-I and HTLV-II and HIV-I and HIV-II on 201 inpatients who fulfilled ICD-9 and DSM III-R criteria for schizophrenia. Our results produced important negative data, since the seropositivity rates for HTLV-I, the most likely pathogen, were no greater than the seropositivity range for HTLV-I carriers in this island population, indicating the HTLV-1 and the other retroviruses tested do not play a primary etiological role in Jamaican schizophrenics.

Psychotic illness in ethnic minorities: clarification from the 1991 census

Age and sex-adjusted first admission rates for operationally-defined schizophrenia and other non-affective psychosis in different ethnic groups were calculated over the period 1988-1992 in a defined catchment area in South London. Standardized rates for schizophrenia, corrected for age- and gender-related under-reporting in the 1991 census and a 20% underestimate of the size of the ethnic minority populations in the area, were not only higher in the Afro-Caribbean group (SMR: 3.1; 95% C1:2.0-4.7), but also in the African group (SMR: 4.2; 95% C1: 2.8-6.2). It was further found that higher rates were not specific to schizophrenia. These findings suggest that some common factor associated with ethnic minority membership is important in producing an excess of psychotic illness.

Cannabis and acute psychosis

The Present State Examination was used to assess the psychopathology of 23 psychotic patients who were cannabis positive on urinary screening, and 46 matched drug-free controls. Cases and controls were indistinguishable in terms of psychopathology, DSMIII diagnoses, onset of recent illness, the proportion of first admissions, ethnicity, and socio-economic class, differing only in their histories of substance use. These data suggest that psychosis which develops or recurs in the context of cannabis use does not have a characteristic psychopathology or mode of onset, and is not restricted to a particular ethnic or socio-demographic group. There is thus little evidence to support the validity of 'cannabis psychosis' as a diagnostic entity.

A follow-up of second generation Afro-Caribbeans and white British with a first admission diagnosis of schizophrenia: attitudes to mental illness and psychiatric services of patients and relatives

A sample of second generation Afro-Caribbeans and white British with a diagnosis of schizophrenia, and their relatives, were interviewed 5-10 years after first admission. There was no difference between Afro-Caribbeans and whites on measures of satisfaction, conceptualization about illness and attitudes to different types of treatment and management. However black relatives were more likely to attribute causation of illness to substance use and to view services as racist. Most black patients and relatives thought that black day centres would be beneficial.

Psychiatric morbidity and compulsory admission among UK-born Europeans, Afro-Caribbeans and Asians in central Manchester

Psychiatric admissions in Central Manchester of Europeans, Afro-Caribbeans, and Asians (within three age-bands) were studied over four years. Among the Afro-Caribbean group there were more single or unemployed persons than in either the Asian or European groups, which suggested greater socio-economic disadvantage. Rates for first admissions and readmissions among Afro-Caribbeans were greater; among Asians they were similar except for the 16-29-year age-group, who tended to have lower rates than Europeans. A higher proportion of Afro-Caribbeans and Asians were psychotic. In the Afro-Caribbean group, the raised rates of admission were largely attributable to increased rates of schizophrenia. The highest rate occurred in second-generation (UK-born) Afro-Caribbeans and was nine times that among Europeans. The police were more frequently involved in the admissions of Afro-Caribbeans compared with Europeans or Asians. Higher proportions of Afro-Caribbeans and Asians who were readmitted were detained under the Mental Health Act 1983, when compared with Europeans.

Mental health, race and ethnicity: a retrospective study of the care of ethnic minorities and whites in a psychiatric unit

A retrospective case-note study of 152 discharged psychiatric patients (77 subjects of ethnic minority origin and 75 whites) examined for details of follow-up arrangements on discharge, compliance rate with out-patient appointments and details on length of stay, status on admission, employment status, record of illicit drug taking and diagnosis. The results show that in the areas of diagnosis, possible illicit drug involvement, status on admission and length of stay, there are significant differences between Afro-Caribbean subjects and others.

Psychotropic medication and ethnicity: an inpatient survey

A survey of the catchment area psychiatric inpatient population of the Bethlem and Maudsley Hospitals showed that more black (Afro Caribbean) than non-black (white British) patients received anti-psychotic medication. This finding ceased to be significant after adjustment for diagnosis because a larger proportion of black than non black patients received a diagnosis of schizophrenia. However, after adjustment for diagnosis, black patients were significantly more likely to be receiving depot anti-psychotic medication, to be detained under a section and to have been involved in a violent incident during the present admission. There were no significant ethnic differences in total dose equivalents of anti-psychotic medication but doses of the depot form were significantly higher for black patients.

Schizophrenia and Afro-Caribbeans. A case-control study

A case-control study was performed using 90% of all first-contact patients with a clinical diagnosis of schizophrenia residing in the London borough of Camberwell between 1965 and 1984. Cases and controls were obtained from the Camberwell psychiatric case register. Controls were those presenting with first episodes of non-psychotic disorders, matched for age, sex and period. The risk of schizophrenia was greater in those of Afro-Caribbean ethnicity, irrespective of age, gender or place of birth. This risk increased over the study period. The results cannot be explained by changes in the age, gender or ethnic structure of the local population. Effects of misdiagnosis or change in diagnostic practice were reduced by using uniform operational criteria. Possible explanations include maternal exposure to unfamiliar infective agents, a differential fall in the age at onset of illness, or worsening social adversity.

Psychiatric hospital admission rates in Jamaica, 1971 and 1988

The overall psychiatric hospital admission rates in Jamaica were 136 per 100,000 in 1971 and 69 per 100,000 in 1988. The admission rate for schizophrenia was 69 per 100,000 in 1971 and 35 per 100,000 in 1988. The 49% reduction in admission rates over these 17 years is attributed to the introduction of an island-wide community mental health service with psychiatric admission to general parish hospitals in 1972. This admission rate for schizophrenia is five to six times lower than the rate reported for Afro-Caribbeans in the UK by a number of studies, and is more in keeping with the admission rate for schizophrenia reported for the general population in England.

Attitudes of relatives of Afro-Caribbean patients: do they affect admission?

This pilot study explored suggestions made in the literature that high rates of Afro-Caribbean patients compulsorily admitted to hospital can be explained by the attitudes of relatives. In particular relatives who hold negative attitudes towards psychiatric services and adopt non-medical explanations for the onset of illness might delay in contacting hospital services. This could delay the process of admission and make a compulsory admission more likely. The attitudes and experiences of relatives of 15 patients admitted compulsorily and 10 admitted informally were compared. The relatives' attitudes did not differ between the two groups. There was also no difference in the severity of current symptoms or the relative's assessment of dangerousness. Neither group was characterised by the sorts of attitudes to illness that had been hypothesised. In fact the group were very similar to the relatives of white psychiatric patients. The data suggest that future research should concentrate on the interaction between families and the services. In particular attention needs to be paid to the possibility that compulsory admissions are occurring because relatives' need for help is not being met and because there is an over-expectation of dangerousness on the part of the services.

Social deprivation and rates of treated mental disorder. Developing statistical models to predict psychiatric service utilisation

A review of the literature shows that there are strong associations of treated prevalence rates of psychiatric disorder with social class, sex, marital status, ethnic group and living alone; and moderate associations with living in inner-city areas and a high degree of residential mobility. The Jarman-8 index of social deprivation correlates with psychiatric admission rates for patients aged less than 65 years (R2 = 0.38). Individual census variables can themselves account for up to 0.71 of the variance in the admission rates, while combined in a stepwise multiple regression the census variables will account for over 0.95 of this variation. Multiple regression models using individual census variables and derived indices should be applied next on a wider geographical basis, and to narrower age, sex and diagnosis-specific psychiatric morbidity rates.

Ethnic factors in voluntary and compulsory admissions

Socio-demographic and clinical aspects of compulsory and informal admissions to general adult psychiatry wards over a two-year period are compared. In addition, Afro-Caribbean patients are compared with white UK-born patients. Relative rates of admission are examined. The study confirms other reports of greater than expected compulsory admissions of Afro-Caribbean patients and pays particular attention to the circumstances preceding compulsory entry to hospital and the persons and agencies involved in that process.

The use of inpatient psychiatric care by immigrants in a London Borough

The prevalence of admission to psychiatric inpatient care in the major immigrant groups in the London Borough of Newham in 1982 is surveyed and results discussed with reference to relevant published literature. High admission rates were found among young West Indian men and older West Indian women, Pakistani men, older Indian women, Irish women and women from the West African new commonwealth. Women from the East African new commonwealth had a low admission rate. The diagnostic mixture found in patients from the various groups is discussed.

Inpatient sociodemographic and diagnostic study from a psychiatric hospital in Libya

Sociodemographic and diagnostic characteristics of 1009 patients admitted to the Psychiatry Hospital, Benghazi (Libya) in one calendar year are reported. Five hundred and four (50%) were 'first admission' cases. There were an average of 2.05 admissions for each 'readmission' case. Eighty nine percent of patients were of Libyan origin, of whom 62% were males; 66% were between 15-34 years of age, 37% were married, 28% were unemployed and 16% were in military service. ICD-9 schizophrenic psychosis was the commonest diagnosis (39%), followed by affective psychosis (17%), neurotic disorders (12%), organic psychosis (8%) and acute psychosis (7%). Neurotic depression was the commonest type of neurotic disorder and antisocial personality was the commonest among personality disorders. Relationship of sociodemographic variables with major diagnostic categories was studied in Libyan patients. Sociodemographic profiles of 'first admission' and 'readmission' cases of Libyan origin were also compared. These findings are discussed in relation to the sociocultural context.

The functional psychoses in Afro-Caribbeans

When 54 Afro-Caribbean and 49 white British consecutive psychotic in-patients were prospectively studied for clinical differences in course of illness and pattern of symptoms, no major differences were found. This does not support the hypothesis that misdiagnosis within the psychoses can explain the higher admission rates of schizophrenia calculated for Afro-Caribbean populations.

Are British psychiatrists racist?

Out of a sample of 220 British psychiatrists, 139 completed a questionnaire regarding a case vignette of psychotic illness. The sex and 'race' of the vignette were varied and the responses compared. The Afro-Caribbean case was regarded as that of an illness of shorter duration, and requiring less neuroleptics than the white case. Respondents judged the Afro-Caribbean case as potentially more violent and thought criminal proceedings were more appropriate. The female vignette was perceived as less violent, less criminal, and less likely to need neuroleptics. Cannabis psychosis and acute reactive psychosis tended to be diagnosed more often and schizophrenia less often in Afro-Caribbean cases, refuting the claim that psychiatrists tend to overdiagnose schizophrenia in this group. Such 'race thinking' (a form of stereotyping which is distinct from ideological racism) could lead to inappropriate management.

Police admissions to a psychiatric hospital. Demographic and clinical differences between ethnic groups

Between October 1983 and December 1985, 268 patients were brought by police to a psychiatric hospital in south London under section 136 of the Mental Health Act 1983. Comparisons were made between 'blacks' and 'whites' on several clinical and demographic variables. The vast majority of admissions received a psychiatric diagnosis. An excess of black admissions was recorded. Black men were younger, were more likely than whites to be given neuroleptics, to be put on compulsory orders, and to be given an out-patient appointment when discharged from hospital. More black men were given a case-note diagnosis of schizophrenia or drug-induced psychosis. The differences in clinical management between ethnic groups could be at least partly accounted for by these differences in diagnosis. Treatment did not appear to be independent of diagnosis among the black admissions.

Psychiatric morbidity among foreign housemaids in Kuwait

First admission rates to the psychiatric hospital in Kuwait revealed that foreign housemaids as a whole had about five times the rate of Kuwaiti females. According to hospital diagnoses the housemaids had significantly more acute situational disturbances and mania, and less depressive illness and organic mental disorders. Regarding schizophrenia and paranoid state there was no significant difference between the two groups. It is recommended that good interpreters should be appointed as part of an appropriate staffing of the psychiatric hospital.

Severe mental disorder in Afro-Caribbean patients: some social, demographic and service factors

Forty-two consecutively identified Afro-Caribbean patients with a first episode of psychosis were compared with a similar group of non-Caribbean patients. A number of differences emerged, although the same proportion of patients in each group had symptoms for 6 months or more prior to psychiatric contact. Afro-Caribbean patients showed greater delay in seeking help, more 'disturbance' later in the course of their illness and were more likely to be admitted compulsorily. The social geography of the two groups suggests that the high rates of schizophrenia and related psychoses that we previously reported cannot be explained simply by differences in area of residence at the time of presentation.

A prospective study of severe mental disorder in Afro-Caribbean patients

Several previous studies have reported increased rates of schizophrenia among Afro-Caribbean immigrants, although doubt has been cast upon the value of case-note diagnoses and retrospective case-finding. A prospective study was therefore undertaken, including all patients of Afro-Caribbean ethnic origin with a first onset psychosis presenting to the psychiatric services from a defined catchment area. Utilizing several diagnostic classifications, rates for schizophrenia were found to be substantially increased in the Afro-Caribbean community, and especially in the 'second generation' British born. Mode of onset and symptom profiles of psychoses suggest that atypical syndromes, and by implication 'misdiagnoses', do not account for reported higher rates of schizophrenic illness in these patients.

The compulsory detention of males of different ethnic groups, with special reference to offender patients

Compulsory detention rates of white, West Indian and Asian males under Part IV and Part V (offenders) of the 1959 Mental Health Act were compared: British-born West Indians and Asians were differentiated from migrants. Rates for Asians were similar to those for whites, but West Indians were significantly over-represented amongst compulsory detentions, especially as offender patients. A high total number of admissions and diagnostic differences accounted for the excess of West Indians admitted under Part IV, but not Part V.

Five-year outcome and prognosis in schizophrenia: a report from the London Field Research Centre of the International Pilot Study of Schizophrenia

A sample of 100 schizophrenic patients admitted to London area psychiatric hospitals were examined as part of the International Pilot Study of Schizophrenia. Clinical and social outcome were variable. At 5-year follow-up, 49% had good symptomatic outcome and 42%, good social outcome. Poor social functioning at inclusion was predictive of poor symptomatic outcome. Illness history (IH), occupational functioning (OF), social relationship functioning (SRF), negative and non-specific symptoms (NNS) at initial evaluation, and their interaction with sex and race accounted for 32% of the 5-year symptomatic outcome variance (n = 84; F = 3.48; P less than 0.001). OF, SRF, housing status, NNS and their interaction with sex, race and age accounted for 47% of the social outcome variance (n = 62; F = 2.62; P less than 0.007).

Immigration and major affective disorder

We studied bipolar (ever manic; n = 297) primary unipolar (never secondary; n = 328), and secondary unipolar (n = 241) RDC major affective disorder patients in the NIMH--CRB Collaborative Study of the Psychobiology of Depression--Clinical. We examined rates of immigration, for patients and their parents, in these three diagnostic groups. Primary patients had a twofold increase in the odds in favor of immigration, compared to secondary patients. The difference persisted when proband age was statistically controlled, and could not be accounted for by any difference in sex ratios between groups. Previous findings of an increased rate of immigration in bipolar patients could not be replicated.

Mental illness among immigrant minorities in the United Kingdom

Cross-cultural studies on immigrants from Pakistan and the New Commonwealth are reviewed, with emphasis on epidemiology and differences in clinical presentation. Their referral to the psychiatric service is also examined and deficiencies are noted. Awareness of transcultural issues among health professionals need to be increased in order to achieve diagnosis and improvements in health care.

Catatonic schizophrenia: an international comparative study

Thirty-five hospitalized catatonic schizophrenic patients from Sri Lanka were compared with 22 patients in the U.K. and 13 in Canada. The phenomenology was established using the Present State Examination. Results suggest that ethnicity, chronicity of illness and reception of neuroleptic treatment may influence the lower prevalence of catatonic symptoms among the U.K. and Canadian schizophrenics. Onset of illness appears to be among young adults and mutism, stupor, mannerisms, stereotypes and negativism were the common catatonic symptoms observed.

Cross-cultural study of religious phenomenology in psychiatric in-patients

Case notes of patients from nine different cultural groups admitted to a London hospital were scrutinized for religious background and religious phenomenology. With the exception of preaching behaviour there were no statistically significant cultural differences, but certain trends were apparent. The pattern of religion in each cultural group could be understood in terms of the historical and geographical origins of these groups. Religious phenomenology was better explained in terms of deep-seated cultural factors rather than current religion.