SERPING1 and metabolic syndrome: Factor Bb, FD, C1q, and C1-INH were not significantly associated with the metabolic syndrome (Table 2, Model 2, Bb, OR = 0.90 [0.74; 1.09]; FD, OR = 1.06 [0.87; 1.31]; C1q, OR = 1.10 [0.91; 1.34]; C1-INH OR = 1.12 [0.91; 1.36]).