OBJECTIVE: To determine whether the incidence of schizophrenia among people from non-white ethnic minorities is greater in neighbourhoods where they constitute a smaller proportion of the total population. DESIGN: Ecological design including retrospective study of case records to calculate the incidence of schizophrenia in the ethnic minority population across electoral wards and multi-level analysis to examine interaction between individuals and environment. SETTING: 15 electoral wards in Camberwell, South London. PARTICIPANTS: All people aged 16 years and over who had contact with psychiatric services during 1988-97. MAIN OUTCOME MEASURE: Incidence rates of schizophrenia according to Research Diagnostic Criteria. RESULTS: The incidence of schizophrenia in non-white ethnic minorities increased significantly as the proportion of such minorities in the local population fell. The incidence rate ratio varied in a dose-response fashion from 2.38 (95% confidence interval 1.49 to 3.79) in the third of wards where non-white ethnic minorities formed the largest proportion (28-57%) of the local population to 4.4 (2.49 to 7.75) in the third of wards where they formed the smallest proportion (8-22%). CONCLUSION: The incidence of schizophrenia in non-white ethnic minorities in London is greater when they comprise a smaller proportion of the local population.
OBJECTIVE: To determine whether the incidence of schizophrenia among people from non-white ethnic minorities is greater in neighbourhoods where they constitute a smaller proportion of the total population. DESIGN: Ecological design including retrospective study of case records to calculate the incidence of schizophrenia in the ethnic minority population across electoral wards and multi-level analysis to examine interaction between individuals and environment. SETTING: 15 electoral wards in Camberwell, South London. PARTICIPANTS: All people aged 16 years and over who had contact with psychiatric services during 1988-97. MAIN OUTCOME MEASURE: Incidence rates of schizophrenia according to Research Diagnostic Criteria. RESULTS: The incidence of schizophrenia in non-white ethnic minorities increased significantly as the proportion of such minorities in the local population fell. The incidence rate ratio varied in a dose-response fashion from 2.38 (95% confidence interval 1.49 to 3.79) in the third of wards where non-white ethnic minorities formed the largest proportion (28-57%) of the local population to 4.4 (2.49 to 7.75) in the third of wards where they formed the smallest proportion (8-22%). CONCLUSION: The incidence of schizophrenia in non-white ethnic minorities in London is greater when they comprise a smaller proportion of the local population.
Authors: G Hutchinson; N Takei; D Bhugra; T A Fahy; C Gilvarry; R Mallett; P Moran; J Leff; R M Murray Journal: Br J Psychiatry Date: 1997-08 Impact factor: 9.319
Authors: Inma Jarrín; Ana García-Fulgueiras; Vicente Ibáñez-Rojo; Débora Alvarez; Rocío García-Pina; Alberto Fernández-Liria; Visitación García-Ortúzar; Domingo Díaz; Maria Angeles Rodríguez-Arenas; Lucía Mazarrasa; Maria Victoria Zunzunegui; Alicia Llácer; Julia Del Amo Journal: Soc Psychiatry Psychiatr Epidemiol Date: 2012-06-21 Impact factor: 4.328