Table 7.

HLA-DRB1 allele association analysis results in RA-OA case-control sample

	Allelic	Allelic OR
HLA-DRB1 allelea	P	(95% CI)	Classificationb
*01	0.162	1.25 (0.92 to 1.66)	N
*03	0.868	1.03 (0.72 to 1.48)	N
*04	1.2 × 10-13	2.92 (2.18 to 3.91)	SE
*07	7.7 × 10-4	0.58 (0.41 to 0.80)	P
*08	0.337	0.75 (0.41 to 1.36)	N
*09	0.209	2.22 (0.62 to 8.00)	N
*10	4.0 × 10-3	3.70 (1.43 to 9.59)	SE
*11	0.177	0.81 (0.58 to 1.11)	N
*12	6.1 × 10-3	0.35 (0.16 to 0.77)	P
*13	1.8 × 10-5	0.47 (0.34 to 0.67)	P
*14	0.359	0.74 (0.39 to 1.41)	N
*15	0.012	0.66 (0.47 to 0.92)	P
*16	0.934	0.98 (0.65 to 1.49)	N

^a Allele numbering according to Table S1 in Additional data file 1.

^b See Table S1 in Additional data file 1.

CI = confidence interval; N = neutral allele; OA = osteoarthritis; OR = odds ratio; P = protective allele; RA = rheumatoid arthritis; SE = shared epitope allele.