The nurse is assessing a patient suspected of having a duodenal ulcer. The patient admits to having a family history of this disease. The nurse knows that another known risk factor for duodenal ulcers is which of the following blood types?
Explanation
• People with blood type O develop duodenal ulcers more frequently than the standard population, suggesting a familial basis
• Type A, B, and AB are not linked to duodenal ulcers