focuses on developing, validating, and refining composite outcomes—single scores or indices that combine multiple instruments or domains into one overall measure.
Example
The Flare Working Group at OMERACT is a prime example of the composites approach. They are developing a composite flare instrument for osteoarthritis that integrates several domains—such as pain, stiffness, physical function, psychological impact, and symptom burden—into a single score. This composite outcome allows researchers and clinicians to capture the full experience of an OA flare more accurately and consistently than by measuring each domain separately.