NCOA5 and Behcet disease: First, the frequency of TT genotype of the NCOA5 rs2903908 polymorphism was significantly higher in the female BD patients compared to those in the healthy controls, and this genotype and allele seemed to be related to an increased (approximately one and half-fold) risk of BD development (p=0.026, OR=1.67, 95 % CI=1.08-2.59).