Table 2 Predictive values of the procalcitonin serum level and the leukocyte antisedimentation rate assessment at T2 for the four cutoff values that separate the five quintiles of parameter distribution
Cutoff value | Cases below the cutoff value (n) | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | Positive likelihood ratio | Negative likelihood ratio |
|---|---|---|---|---|---|---|---|
Procalcitonin (ng/ml) | |||||||
0.69 | 7 | 27 | 9 | 62 | 14 | 0.3 | 8.1 |
1.23 | 13 | 68 | 55 | 75 | 46 | 1.5 | 0.6 |
2.43 | 20 | 52 | 83 | 85 | 50 | 3.1 | 0.6 |
4.43 | 26 | 30 | 100 | 100 | 38 | >20 | 0.7 |
Leukocyte antisedimentation rate (%) | |||||||
6.3 | 7 | 88 | 31 | 58 | 71 | 1.7 | 0.2 |
10.6 | 13 | 76 | 56 | 65 | 69 | 1.5 | 0.6 |
12.7 | 20 | 71 | 94 | 92 | 75 | 6.1 | 0.5 |
23.2 | 26 | 41 | 100 | 100 | 62 | >20 | 0.7 |