Table 2  Association Results of HLA Variants for Subphenotype Risk Comparisons of PsA and PsC
HLA Variant   Frequency   PsA-Affected versus PsC-Affected Individuals
PsA   PsC   OR (95% CI)   p
HLA-B Amino Acid Position 45 (Nominal)
Glu  0.43  0.33  1.46 (1.31–1.62)  2.9 × 10−12
Thr, Lys, Met  0.57  0.67  reference  reference
Abbreviations are as follows: CI, confidence interval; OR, odds ratio; PsA, psoriatic arthritis; and PsC, cutaneous psoriasis.