Table 3. CRP level of AS patients with different genotypes of single nucleotide polymorphisms (SNPs) on IL-23R.

	rs6693831					rs7517847				rs1884444				rs10889677
	CC		CT	TT	P-value	TT	GT	GG	P-value	TT	GT	GG	P-value	AA	AC	CC	P-value
CRP(mg/L)	17.9 ± 30.9	26.1 ± 34.4		21.0 ± 31.6	0.03	19.4 ± 29.9	21.3 ± 31.2	24.8 ± 36.1	0.467	21.8 ± 32.9	20.2 ± 30.6	24.6 ± 33.2	0.478	19.2 ± 28.2	19.2 ± 28.2	23.9 ± 36.4	0.95

Data are presented as mean ± SD, comparisons between groups were made by the Kruskal-Wallis test as appropriate.