Which statement describes a composite variable?

Which statement describes a composite variable?

• A. A variable created by combining several measurements into a single score using a predefined algorithm.
• B. A single measurement repeated multiple times.
• C. A post-hoc constructed endpoint not defined in protocol.
• D. The primary safety endpoint.

Answer: (A)

A composite variable is a single score created by combining multiple measurements or components using a predefined algorithm. This approach lets you capture an overall concept that reflects more than any individual measure, often improving sensitivity to treatment effects. In practice, you would specify exactly which components are included, how they are weighted or combined, and how to handle missing data in the protocol and statistical analysis plan to ensure the result is reproducible and interpretable. The other statements describe either a single measurement, a post-hoc endpoint not defined in the protocol, or a predefined primary endpoint, none of which define the idea of merging several measurements into one score.

A composite variable is a single score created by combining multiple measurements or components using a predefined algorithm. This approach lets you capture an overall concept that reflects more than any individual measure, often improving sensitivity to treatment effects. In practice, you would specify exactly which components are included, how they are weighted or combined, and how to handle missing data in the protocol and statistical analysis plan to ensure the result is reproducible and interpretable. The other statements describe either a single measurement, a post-hoc endpoint not defined in the protocol, or a predefined primary endpoint, none of which define the idea of merging several measurements into one score.