Objective
Stiffness was endorsed within the RA Flare core domain set at OMERACT11. Two stiffness breakout-groups at the OMERACT2014 RA Flare workshop discussed results of new qualitative studies in RA stiffness.
Methods
Results from two independent studies of RA stiffness were presented to breakout group participants, followed by group discussions about stiffness measurement.
Results
Both studies identified stiffness as complex and variable with disease activity, and encompassing impact, intensity, timing, location, and duration. Impact on multiple dimensions of health was a common finding. Participants agreed stiffness is an important aspect of RA flare. Whether measuring only morning stiffness duration, the traditional approach in RA, was sufficient in coverage of the concept was unclear. Groups agreed more research on stiffness measurement is needed considering the importance patients place on impact of stiffness.
Conclusion
Results from independent studies highlight stiffness impact as an important feature of RA, in addition to intensity, timing, location, and duration. Additional work is needed to identify optimal ways to assess stiffness in RA and other rheumatologic diseases.