New Delhi : According to a new study, heart patients are three times more likely to have diabetes in comparison to the general population. The findings of the study were published in the European Journal of Preventive Cardiology, a journal of the European Society of Cardiology (ESC). Nearly 30 per cent of patients with coronary artery disease have diabetes, according to the study. That compares to a diabetes prevalence of around 9 per cent in the general population. There was wide geographical variation, with 60 per cent of heart disease patients in Gulf countries having diabetes compared to 20 per cent in Europe.