Table 4.
Threshold values of PCT, IL-6, I/T index, PLT and the combination PCT ≥ 0.46 + IL-6 6 ≥ 4.97+ I:T index ≥ 0.335 + PLT ≤ 161.5 to distinguish Group 1 from groups 0 and 2, and validation criteria values.
| Parameter | Threshold Value | Sensitivity (%) | Specificity (%) | Positive Predictive Value (%) | Negative Predictive Value (%) | Accuracy (%) |
|---|---|---|---|---|---|---|
| PCT | ≥0.46 * | 76 | 74 | 64 | 84 | 75 |
| PCT | ≥0.5 | 71 | 74 | 63 | 81 | 73 |
| IL-6 | ≥27.5 * | 78 | 70 | 56 | 87 | 73 |
| I:T index | ≥0.335 * | 50 | 80 | 59 | 74 | 69 |
| I:T index | ≥0.25 | 20 | 97 | 80 | 68 | 69 |
| PLT | ≤161.5 | 43 | 97 | 90 | 76 | 78 |
| PCT + IL-6 + I:T index + PLT | ≥0.276 * | 94 | 68 | 63 | 95 | 78 |
| PCT + IL-6 | ≥0.206 * | 94 | 56 | 53 | 95 | 69 |
* These threshold values are calculated using data from the present study.