BMI, body mass index; ASDAS, Axial Spondyloarthritis Disease Activity Score; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; CRP, C-reactive protein; BASFI, Bath Ankylosing Spondylitis Functional Index; ASQoL, Ankylosing Spondylitis Quality of Life; ASAS-HI, ASAS-Health index; NSAID, Non Steroid Anti Inflammatory Drug; bDMARDs, biologic disease-modifying antirheumatic drugs; N.a., not available. This evidence concerns the gene CRP and spondylitis.