The Cross-Cutting Domains Task Force is a methodological working group within OMERACT focused on improving clarity and consistency in outcome measurement. This team develops consensus-based definitions for foundational domains that appear across multiple OMERACT Core Domain Sets — and identifies instruments to measure them.

These “cross-cutting” domains include:

• Pain Intensity

• Pain Interference

• Fatigue

• Physical Function

• Health-Related Quality of Life

Why This Work Matters

Many OMERACT Working Groups face similar challenges when defining core domains and selecting instruments. Without shared definitions, the same concepts may be interpreted and measured differently across Core Outcome Sets, slowing progress and limiting comparability across studies. This task force helps solve that problem.

What We Do

• Define Domains: Develop detailed, consensus-based definitions through structured collaborator engagement, including patient research partners (PRPs), clinicians, and methodologists.

• Review Instruments: Conduct systematic literature reviews of available tools to evaluate domain match, feasibility, and measurement properties.

• Recommend Instruments: Identify and provisionally endorse instruments that meet the OMERACT Filter 2.3 standards.