No statistically significant association was disclosed between CPT levels and disease activity (assessed by Bath Ankylosing Spondylitis Disease Activity Index [BASDAI]) or markers of inflammation (CRP and erythrocyte sedimentation rate [ESR]) at the time of the study, or with ESR at the time of axSpA diagnosis (p > 0.05). This evidence concerns the gene CRP and ankylosing spondylitis.