Abbreviations: ADAbs: anti-drug antibodies; ESR: erythrocyte sedimentation rate; RA: rheumatoid arthritis; SPA: Spondyloarthritis; CD: Crohn’s disease; CRP: C-reactive protein; DAS28: disease activity score; BASDAI: bath ankylosing spondylitis disease activity index; ASDAS: ankylosing spondylitis disease activity score; HBI: Harvey Bradshow index; NS: not significant