Tài liệu Báo cáo y học: "Therapy of ankylosing spondylitis and other spondyloarthritides: α established medic

The spondyloarthritides (SpAs) comprise five subtypes: ankylosing spondylitis (AS), reactive arthritis, major parts of the arthritis/spondylitis spectrum associated with psoriasis (psoriatic arthritis; PsA) and inflammatory bowel disease associated with arthritis/spondylitis and undifferentiated SpA. AS is the most frequent subtype of SpA, being more prevalent than the undifferentiated type, but PsA, based on the high prevalence of psoriasis, is also quite frequent [1,2], while reactive arthritis and inflammatory bowel disease associated with arthritis/spondylitis are relatively rare. The prevalence of the whole group of SpAs has been recently estimated to be between 0.6 and 1.9%,with a prevalence of AS between 0.1 and 1.1% [1–4].