TABLE 3.

Correlations of SII with CRP, ESR, and BASDAI in AS patients

Items	CRP		ESR		BASDAI
	rs	p	rs	p	rs	p
SII	0.483	<0.001	0.374	<0.001	0.667	<0.001

Abbreviations: BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; CRP, C‐reactive protein; ESR, erythrocyte sedimentation rate; SII, systemic immune‐inflammation index.