Comparison of ankylosing spondylitis patients with and without fibromyalgia syndrome according to the disease activation scores and response to treatment.

On the other hand, Moltó et al.,[ 26 ] supporting the results of our study, showed that the response to biological therapy was lower in AS patients with FM at 12 months compared to AS patients without FM (although this low response did not reach statistical significance for BASDAI, it reached statistical significance for ASAS-20 and ASAS-40 responses).

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