Secondary Outcomes are best described as what?

• A. Main endpoints
• B. A single primary endpoint
• C. A composite endpoint
• D. Additional endpoints

Answer: (D)

Secondary outcomes are additional endpoints measured in a study beyond the main question of interest. They provide information about other effects of the intervention, such as safety, tolerability, quality of life, or biomarker changes, and are not the primary focus of the trial. This is why describing them as additional endpoints fits best. The main endpoints refer to the primary objective of the study, and a single primary endpoint is not secondary. A composite endpoint combines several outcomes into one measure and is usually used as a single primary outcome in many trials, not as a secondary outcome.