Table 5 Procalcitonin (PCT) test characteristics for predicting bacterial infection
Cut point ≥ (ng/ml) | Sensitivity | Specificity | Positive predictive value | Negative predictive value |
|---|---|---|---|---|
0.5 | 88% (81-93) | 30% (21-40) | 62% (55-69) | 67% (51-80) |
1.0 | 85% (77-90) | 37% (28-47) | 64% (56-71) | 65% (51-77) |
2.0 | 70% (61-78) | 62% (52-71) | 70% (62-78) | 61% (51-71) |
3.0 | 63% (54-71) | 82% (73-89) | 82% (73-89) | 63% (54-71) |
4.0 | 56% (47-65) | 87% (78-93) | 85% (75-91) | 60% (52-68) |