NPC1L1 and ankylosing spondylitis: No significant associations with ankylosing spondylitis were observed for the PCSK9 score (OR, 0.89; 95% CI, 0.68–1.16; P value = 0.378) and the NPC1L1 score (OR, 1.50; 95% CI, 0.39–5.77; P value = 0.556) (Figure 1).