We observed significant association with iNOS-954 combined (GC+CC) genotype in subgroups that were with active vitiligo (adjusted OR = 1.35; 95% CI = 1.01–1.82), that were diagnosed with nonsegmental vitiligo (adjusted OR = 1.36; 95% CI = 1.02–1.82) and that had no other autoimmune diseases (adjusted OR = 1.39; 95% CI = 1.04–1.85) (Table 3). Here, NOS2 is linked to autoimmune disease.