* Radiographic record of unilateral;
Data were presented as mean ± standard deviation, median (lower
quantile, upper quantile) or number (percent). ASDAS: Ankylosing
Spondylitis Disease Activity Score; BASDAI: Bath Ankylosing Spondylitis
Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional
Index; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate;
HLA: human leukocyte antigen; M/F: male/female; NSAIDs: non-steroidal
anti-inflammatory drugs; SASP: sulfasalazine; TNFi: tumor necrosis
factor inhibitor.
Table 2 Detailed methylation status of the 31 CpG sites of AS patients
and HCs