Table 3. Urinary semaphorin 3A test characteristics at different cutoff values.

Cutoff Value for Semaphorin 3A,pg/mg of Urine Creatinine	Sensitivity	Specificity	Positive Predictive Value	Negative Predictive Value
110	0.96	0.03	0.43	0.50
492	0.81	0.94	0.91	0.87
910	0.62	0.97	0.94	0.77

The cutoff values are urinary semaphorin concentrations at 2 h after cardiopulmonary bypass, which correspond to 95% sensitivity, optimal sensitivity and specificity, and 95% specificity, respectively.