Table 4

 Interaction of HLA-Cw6 with HLA-DRB1*07 in damaged and involved joints

HLA-Cw6HLA-DRB1*07n (%)Damaged joints OR (95% CI)Involved joints OR (95% CI)Tender joints OR (95% CI)Swollen joints OR (95% CI)
+, presence of one or two alleles; −, absence of alleles.
p Value calculated using negative binomial regression analysis.
317 (51.9)ReferentReferentReferentReferent
+71 (11.6)0.96 (0.69 to 1.33)1.12 (0.87 to 1.44)1.46 (0.98 to 2.18)1.26 (0.83 to 1.90)
p = 0.82p = 0.37p  = 0.07p  =  0.28
+78 (12.8)1.10 (0.79 to 1.54)1.21 (0.93 to 1.57)1.52 (1 to 2.31)1.07 (0.70 to 1.64)
p = 0.57p = 0.15p = 0.05p = 0.75
++145 (23.7)0.59 (0.45 to 0.76)0.69 (0.56 to 0.84)1.02 (0.75 to 1.41)0.96 (0.69 to 1.33)
p = 0.02p<0.001p = 0.86p = 0.28