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Diagnostic values of serum BK and SCCA at Youden's index maximum.
| Groups | Cut-off (ng/ml) | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) |
|---|---|---|---|---|---|
| BK | 5.15 | 65.85 | 66.67 | 78.64 | 51.16 |
| SCCA | 1.70 | 32.52 | 96.97 | 95.24 | 43.53 |
BK, bradykinin; SCCA, squamous cell carcinoma-related antigen.
