Distinct PsA SNPs have previously been reported at known psoriasis susceptibility loci12; here we confirm that the PsA risk variant at the IL23R locus is independent from the reported psoriasis variant (Pcond=2.4 × 10−14) and including the reported psoriasis SNP does not improve the fit of the model (PLRT=0.21). Here, IL23R is linked to psoriasis.