Some social and phenomenological characteristics of psychotic immigrants.

Various studies have shown: (i) increased rates of psychoses in immigrants to Britain, and a particularly high rate of schizophrenia in the West Indian- and West African-born; and (ii) a greater proportion of atypical psychoses in immigrants. A retrospective study of psychotic inpatients from a London psychiatric unit demonstrated increased rates of schizophrenia in patients from the Caribbean and West Africa. These patients included a high proportion of those with paranoid and religious phenomenology, those with frequent changes of diagnosis, formal admissions, and married women. The West Indian-born had been in Britain for nearly 10 years before first seeing a psychiatrist and, if they had an illness with religious symptomatology, were likely to have been in hospital for only 3 weeks. Rates of schizophrenia without paranoid phenomenology were similar in each ethnic group. It is suggested that the increase in the diagnosis of schizophrenia in the West Indian-born, and possibly in the West African-born, may be due in part to the occurrence of acute psychotic reactions which are diagnosed as schizophrenia.