Figure 2.

Association between anti-drug antibody status and clinical activity (Ankylosing Spondylitis Disease Activity Score) after switching. Clinical activity classified into inactive (light shading), moderate (medium shading) and high/very high activity (dark shading), according to Ankylosing Spondylitis Disease Activity Score criteria, 6 months after switching to a second anti-TNF drug in patients who had developed anti-drug antibodies (ADA) against the first anti-TNF drug.

Plasencia et al. Arthritis Research & Therapy 2013 15:R79   doi:10.1186/ar4258
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