Table 3. Allelic frequencies of KIR3DL1*F, KIR3DL1*004 and KIR3DS1 in AS patients and healthy controls in Russian Caucasian population.

Allele	Frequency, % (no. of alleles)		P value	OR (95% CI)
AS (2n=166)	Control (2n=214)
3DL1*F	48.2% (80)	63.1% (135)	0.005	0.54 (0.36–0.82)
3DL1*004	21.1% (35)	18.2% (39)	NS	—
3DS1	30.7% (51)	18.7% (40)	<0.01	1.94 (1.21–3.12)

Abbreviations: AS, ankylosing spondylitis; CI, confidence interval; KIR, killer immunoglobulin-like receptor; NS, not significant; OR, odds ratio.