Table 4.

Diagnostic performances of continuous studied variables and cut-off levels.

	AUC [IC 95%]	Cut-off level	Sensitivity [IC 95%]	Specificity [IC 95%]	Positive predictive value [IC 95%]	Negative predictive value [IC 95%]	p-value
CRP (mg/L)	0.759 [0.671–0.846]	36	80.7% [68.4–89.0]	64.5% [52.0–75.2]	67.6%	78.4%	N/A
Eosinophil count (G/L)	0.852 [0.784–0.920]	0.010	86% [74.3–92.9]	79.7% [68.1–87.8]	79%	86.4%	0.0845a
Lymphocyte count (G/L)	0.754 [0.667–0.842]	1.520	91.2% [80.5–96.5]	56.3% [44.1–67.7]	65%	87.8%
Eo/PMN ratio × 1000	0.846 [0.778–0.914]	3.344	87.7% [76.3–94.1]	73.4% [61.4–82.7]	74.6%	87.0%	0.0003b
Ly/PMN ratio × 1000	0.621 [0.521–0.721]	203.98	59.6% [46.7–71.4]	64.1% [51.8–74.7]	59.6%	64.1%

CRP: C-reactive protein; Eo: eosinophil; PMN: polymorphonuclear neutrophil; Ly: lymphocyte; AUC: area under curve; N/A: not applicable; 95% CI: 95% confidence interval.

^aComparison between eosinophil count and lymphocyte count AUC using Delong's method.

^bComparison between Eo/PMN ratio × 1000 and Ly/PMN ratio × 1000 AUC using Delong's method.