Final answer:
Cardiovascular diseases are the leading cause of death in hospitalized people over the age of 65.
Step-by-step explanation:
The leading cause of death in hospitalized people over the age of 65 is cardiovascular diseases. Cardiovascular disease is a class of diseases that involve the heart or blood vessels, such as coronary artery disease and stroke. It is the leading cause of death worldwide, and most cases occur in people over age 60.