Let us look at case scenarios where diabetes is a cause of death or a contributing condition.

A diabetic man who had been under insulin control for many years, developed ischemic heart disease and died suddenly from a myocardial infarction.

•Myocardial infarction is the immediate cause of death on line A of Part 1.

•Chronic ischaemic heart disease is reported on line B of Part 1 as the underlying cause of death. 

•Diabetes mellitus is a contributing factor, so it is reported in Part 2.