In NOD1//rs2075818, the frequencies of the GG genotype and G allele were also decreased in the BD patients (Pc = 1.022E-02, OR = 0.536, 95% CI = 0.386–0.745; Pc = 6.811 × 10−5, OR = 0.720, 95% CI = 0.629–0.824, respectively). This evidence concerns the gene NOD1 and Behcet disease.