People with longstanding diabetes have a greater risk of dev

People with long-standing diabetes have a greater risk of developing pancreatic cancer when compared with those who do not have diabetes. This is an example of:

Solution

Ans D

Epidemiological association

80% people having pancreatic cancer have either glucose intolerance or diabetes. Now there can be 2 possibilities, either cancer caused the associated diabetes or the long standing conditions caused the pancreas to have cancer. Recent studies and investigations supports both the hypothesis. So there is an epidemiological association between them.