Table 3.

Cut-off, sensitivity, specificity, PPV and NPV values for blood tests

Blood Parameters	Cut-Off	Sensitivity	Specificity	PPV£	NPVa	OR	Lb	Ub
Procalcitonin (pg/mL)	21.24	90.47	85.71	90.47	85.71	57	7.05	460.36
IL-6 (pg/mL)	33.73	90.476	78.57	86.363	84.615	34.83	5.02	241.71
IL-2 (pg/mL)	175.35	76.19	71.42	80	66.66	8	1.72	37.09
D-dimer (ug/mL)	0.105	89.47	85.69	82.74	87.51	57	7.501	406.326

^£Positive Predictive Value;

^aNegative Predictive Value;

^b95% CI for OR