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Table 3 Verosimilarity ratio (VR) of different cut-off points of procalcitonin (PCT) concentration for the diagnosis of systemic infection in patients with febrile neutropenia.

From: Procalcitonin (PCT) and C-reactive Protein (CRP) as severe systemic infection markers in febrile neutropenic adults

[PCT] ng/mL With systemic infection (sensitivity) Without systemic infection (1 - specificity) Likelihood ratio* (95% CI)
0,245 26
100%
18
69,2%
1,44 (Incalculable*)
0,275 24
92,3%
18
69,2%
1,33 (1,01 to 1,76)
0,490 22
84,6%
13
50,0%
1,69 (1,11 to 1,76)
1,160 15
57,7%
4
15,4%
3,75 (1,44 to 9,79)
1,730 14
53,8%
2
7,7%
7,00 (1,76 to 27,78)
2,145 13
50,0%
1
3,8%
13,00 (1,83 to 92,29)
2,390 13
50,0%
0
0%
(Incalculable*)  
TOTAL 26
100,0%
26
100,0%
  
  1. * Impossible to calculate, for the values of sensitivity or of 1 - specificity correspond to 100% of the sample with or without the disease.