Abstract Number: 646 • 2018 ACR/ARHP Annual Meeting
Do Ethnicity, Degree of Family Relationship, and the Spondyloarthritis Subtype in Affected Relatives Influence the Association between a Positive Family History for Spondyloarthritis and HLA-B27 Carriership? Results from the Worldwide ASAS Cohort
Background/Purpose: The Assessment of SpondyloArthritis international Society (ASAS) defines a positive family history (PFH) of spondyloarthritis (SpA) as presence of ankylosing spondylitis (AS), acute anterior…