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Updated: Jul 8, 2025

Author Spotlight: Self-Assessment Protocol for Predicting Psoriatic Arthritis in Psoriasis Patients
Published on: March 1, 2024
Patient outcomes in longitudinal observational studies (POLOS) of rheumatoid arthritis: Determining the OMERACT core
Diego Benavent1, Loreto Carmona2, Maria A Lopez-Olivo3
1Rheumatology Department, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.
Objective:
To define and select rheumatoid arthritis (RA)-specific core domain set for Longitudinal Observational Studies (LOS) within the Outcome Measures in Rheumatology (OMERACT) framework.
Methods:
A three-round online Delphi exercise, including patient research partners (PRPs) and other community partners in healthcare, was conducted. Domains scored 7-9 (i.e., critically important to include) by ≥ 70 % of participants in both groups were included. Items were consolidated in a subsequent dedicated meeting.
Results:
Nineteen domains scored ≥ 70 % consensus in both groups. The focus group refined these into a list of twelve domains.
Conclusion:
The achieved consensus will inform the next steps of developing the core domain set for LOS in RA.
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