Table 4 Diagnostic accuracy of serum PCT for the diagnosis of sepsis in critically ill patients with either primary or secondary BSI-related sepsis.
PCT cutoff value (ng/mL) | Sepsis type | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) |
|---|---|---|---|---|---|
PCT ≥ 0.25 | Primary | 98.3 | 47.8 | 90.5 | 84.6 |
Secondary | 90.3 | 47.8 | 82.3 | 64.7 | |
PCT ≥ 0.50 | Primary | 94.9 | 65.2 | 93.3 | 71.4 |
Secondary | 83.9 | 65.2 | 86.7 | 60.0 | |
PCT ≥ 1.00 | Primary | 89.7 | 73.9 | 94.6 | 58.6 |
Secondary | 72.6 | 73.9 | 88.2 | 50.0 | |
PCT ≥ 2.00 | Primary | 83.8 | 82.6 | 96.1 | 50.0 |
Secondary | 58.1 | 82.6 | 90.0 | 42.2 |