Hematuria associated with active lupus nephritis also occurred more frequently among carriers of the BAFF-var polymorphism (8 of 18, 44%) than among patients without this polymorphism (30 of 177, 17%) (p = 0.003; OR, 3.9; 95% CI, 1.46–10.76) (Table 3). This evidence concerns the gene TNFSF13B and lupus nephritis.