Population at risk is defined as which of the following?

• A. Groups of people who are at a greater risk of exposure to a specific negative outcome than the general population
• B. Vulnerable persons
• C. Examples of trauma
• D. Statements serve two valuable purposes

Answer: (A)

The main idea is to identify who could actually develop the outcome being studied. Population at risk means groups of people who do not yet have the outcome but could develop it, and are defined in relation to that specific outcome. They are the people observed for new cases because they are susceptible, often excluding those who already have the outcome or who cannot develop it. For example, in studying a work-related health issue, the population at risk would include workers without the health condition who are exposed to the relevant risk factors; someone already with the condition would not be part of the at-risk group for incident cases. This matches the notion of groups “at greater risk of exposure to a specific negative outcome than the general population.” The other options describe types of people (like broadly vulnerable individuals) or the outcomes themselves, which don’t define who could develop the outcome.