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The sensitivities, specificities, positive predictive values (PPV), and negative predictive values (NPV) for C-reactive protein (CRP) as a marker of spontaneous bacterial peritonitis.
| CRP cutoff | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
| 10.0 mg/L | 93.5% | 15.6% | 51.8% | 71.4% |
| 20.0 mg/L | 58.1% | 53.1% | 54.5% | 56.7% |
| 30.0 mg/L | 41.9% | 78.1% | 65.0% | 58.1% |
| 40.0 mg/L | 35.5% | 81.2% | 64.7% | 56.5% |
| 50.0 mg/L | 22.6% | 90.6% | 70.0% | 54.7% |
