Table 4 Diagnostic accuracy of serum procalcitonin for the discrimination between gram positive and gram negative bacteremia in critically ill patients with clinical sepsis and positive blood cultures.
PCT cutoff value (ng/mL) | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Likelihood ratio + | Likelihood ratio - |
|---|---|---|---|---|---|---|
PCT > 16.0 95% CI | 75.0% [61.0–86.0] | 82.2% [68.0–92.0] | 83.0% [69.0–92.0] | 74.0% [60.0–85.0] | 4.21 [1.91–10.7] | 0.30 [0.15–0.57] |