Having diabetes increases the risk of dying from the effects of a heart attack by around 50 per cent, according to a widespread study.
Researchers at the University of Leeds tracked 700,000 people who had been admitted to hospital with a heart attack between January 2003 and June 2013.
Of these, 121,000 had diabetes.
After stripping out the effects of age, sex, any other illnesses and differences in the emergency medical treatment received, the team found stark differences in survival rates.