There are sustained ethnic differences in the nature of diabetes, including vascular risk factors. AC patients had a substantially reduced risk of myocardial infarction that was not explained by their more favourable lipid profile, while IA patients were more likely to develop nephropathy than WC and IA patients. Longer follow-up is needed to determine whether the increased macrovascular risk observed in IA patients in other studies is replicated in the UKPDS cohort.