NAMPT and gestational diabetes: Similarly, resistin and visfatin showed high sensitivity and specificity in predicting GDM at threshold level of ≥5.3 ng/ml and ≥ 2.8 ng/ml respectively However, BMI showed a sensitivity and specificity of 51.4 and 67.1% respectively at a cut of point of ≥27 kg/m2 (Table 3).