Sputum Studies of Anti-Citrullinated Protein Antibodies (ACPA) and Rheumatoid Arthritis (RA) Origins [SPARO]

Primary Objective

We are trying to learn more about the causes of rheumatoid arthritis (RA). People who get RA have elevated protein markers called autoantibodies in their blood years before initial symptoms of arthritis. In this study, we are planning to learn more about how autoantibodies in RA might be related to inflammation in the lungs.

Study category: Bones, Muscles, and Joints

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Are you eligible? You are a man or woman & at least 18yrs old You have a parent, sibling, or child with rheumatoid arthritis Call us with questions: (303) 724-0071

Main Procedures Involved: What is involved? • Study clinic visit (Anschutz Medical Campus) • Questionnaires about your health history, family health history, & environmental factors • Blood & sputum collection • Joint examination

Duration of Participation: Up to 4 research visits over 3 years


18 to 100 years


Compensation Provided


UCD Barbara Davis Center

Study ID

Protocol Number: 20-0206

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