Table 3 Descriptive statistics of the accuracy of procalcitonin (PCT) as a diagnostic tool for severe Plasmodium falciparum disease using various cut-off points.
| Â | PCT cut-off point | ||
|---|---|---|---|
P. falciparum species only (n = 71) | 0,5 ng/ml | 2,0 ng/mL | 10,0 ng/mL |
Sensitivity | 1,00 [n.a.] | 1,00 [n.a.] | 0,67 [0,56-0,78] |
Specificity | 0,35 [0,24-0,46] | 0,60 [0,49-0,71] | 0,94 [0,88-1,00] |
Positive predictive value | 0,13 [0,05-0,21] | 0,19 [0,10-0,28] | 0,50 [0,38-0,62] |
Negative predictive value | 1,00 [n.a.] | 1,00 [n.a.] | 0,97 [0,93-1,00] |
All plasmodium species (n = 100) | 0,5 ng/ml | 2,0 ng/mL | 10,0 ng/mL |
Sensitivity | 1,00 [n.a.] | 1,00 [n.a.] | 0,67 [0,58-0,76] |
Specificity | 0,29 [0,20-0,38] | 0,51 [0,41-0,61] | 0,94 [0,83-0,95] |
Positive predictive value | 0,08 [0,03-0,13] | 0,19 [0,06-0,18] | 0,50 [0,20-0,38] |
Negative predictive value | 1,00 [n.a.] | 1,00 [n.a.] | 0,97 [0,95-1,00] |