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The sensitivities, specificities, positive predictive values (PPV), and negative predictive values (NPV) for procalcitonin (PCT) as a marker of spontaneous bacterial peritonitis.
| PCT | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
| 0.10 ng/mL | 41.9% | 75.0% | 61.9% | 57.1% |
| 0.25 ng/mL | 22.6% | 81.2% | 53.8% | 52.0% |
| 0.50 ng/mL | 19.3% | 84.4% | 54.5% | 51.9% |
| 1.00 ng/mL | 3.2% | 93.7% | 33.3% | 50.0% |
