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Lessons from an early rheumatoid arthritis incident cohort
Vivian P Bykerk1, Susan J Bartlett2, Orit Schieir2
1Hospital for Special Surgery, NY, USA.
Seminars in Arthritis and Rheumatism
|June 5, 2026
Summary
The Canadian Early Arthritis Cohort (CATCH) study provides crucial real-world data on early rheumatoid arthritis (ERA) care. Key learnings inform diagnosis, treatment, and highlight health equity challenges for improved patient outcomes.
Area of Science:
- Rheumatology
- Clinical Epidemiology
- Health Services Research
Background:
- The Canadian Early Arthritis Cohort (CATCH) is a national registry established in 2007.
- It has generated significant real-world evidence for early rheumatoid arthritis (ERA) care in Canada and globally.
Purpose of the Study:
- To synthesize 15 key learnings from the CATCH study.
- To highlight advancements and challenges in early rheumatoid arthritis care, including diagnosis, treatment, patient outcomes, and health equity.
Main Methods:
- Data collected from over 3800 patients across 25 sites.
- Over 35,000 study visits recorded.
- Analysis of real-world data from an incident cohort.
Main Results:
- Standardized data collection, early methotrexate use, and treat-to-target approaches are crucial.
- Challenges include persistent disease activity, treatment adherence, and health disparities (sex, comorbidities, social determinants).
- CATCH has informed guidelines, developed outcome measures, and supported research continuity (e.g., during COVID-19).
Conclusions:
- The CATCH study provides actionable insights impacting clinical and policy decisions in ERA.
- Well-curated patient registries like CATCH are vital for improving outcomes in early rheumatoid arthritis.
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