Variation in rates of suicide in Black and minority ethnic (BME) groups have been reported in different countries.1,2 Rates of suicide 3,4 and self-harm 5-7 may be lower in BME groups than White groups overall, but this finding may obscure differences in age-and gender-specific groups. Also, rates of suicide and self-harm within ethnic minority groups may fluctuate according to area, with a decline in relative risk of suicide and self-harm where there is a larger density of minority populations. 8,9 Previous research on BME groups in the UK has generally been conducted in single geographical areas, 10 and self-harm studies have been limited by small sample size, with few studies of people of African-Caribbean origin.11 A report on suicide prevention for BME groups in England calls for better information on rates and risk factors for suicide or behaviours that increase the likelihood of suicide. 12 We have conducted a study of self-harm in different minority ethnic groups using a multicentre database of self-harm in three geographical areas in England. Our objectives were to compare ethnic groups (that is, White, South Asian and Black African-Caribbean) with regard to: age-and gender-specific rates of self-harm in different cities; sociodemographic and clinical characteristics; clinical management following self-harm; and risk of repetition of self-harm.
Method Study design and data collectionWe conducted a prospective, multicentre cohort study, identifying all episodes of self-harm presenting to emergency departments in general hospitals in Manchester (three hospitals), Derby (two hospitals) and Oxford (one hospital). The study hospitals were chosen on a pragmatic basis -the centres included were those that had established monitoring systems. The cities of Manchester, Derby and Oxford have different profiles (Table 1), with ethnic groups forming a greater proportion of the general population in Manchester. According to the UK government's Index of Multiple Deprivation, where 353 local authority areas in England were scored on a number of indicators (covering a range of economic, social and health issues) into a single deprivation score, 13 Manchester was ranked fourth (worst), Derby sixty-ninth and Oxford one hundred and fifty-fifth.Data were collected using established monitoring systems in the three centres, described in full elsewhere.14,15 Self-harm attendances were identified via detailed examination of computerised emergency department records and defined consistently across all three centres as intentional self-poisoning or self-injury, irrespective of motivation and degree of suicidal intent.16 Most participants received a psychosocial assessment from emergency department staff and/or mental health specialists. For assessed participants, clinicians recorded a wide range of sociodemographic and clinical information using research assessment forms. For participants who were not assessed (for example, because they refused or took early discharge), basic information was collected by research clerks from medi...