Coyle RM, et al. - In this study, the association of ethnicity with sexual behaviour and sexual health was investigated among women and heterosexual men attending genitourinary medicine (GUM) clinics in England. Women of black ethnicity reported risk behaviours less frequently. However, black/mixed Caribbean women displayed more prevalent history of STI. In black/mixed Caribbean men, higher STI history was not explained by ethnic variation in reported risk behaviours. After adjustment for risk behaviours, the association between STI and black/mixed Caribbean ethnicity remained.