Clinical Significance of Procalcitonin, C-Reactive Protein, and Interleukin-6 in Helping Guide the Antibiotic Use for Patients with Acute Exacerbations of Chronic Obstructive Pulmonary Disease

Table 2

Evaluation of the diagnostic and predictive value of the antibiotic prescription value of AECOPD inflammatory factors using ROC curve.

Group	Index	AUC	value	95% CI	Cut-off value	Sensitivity	Specificity
Case 1	PCT	0.647	0.001	0.573-0.720	0.065	34.5	93.5
	CRP	0.764	<0.001	0.703-0.814	8.210	56.3	91.3
	IL-6	0.773	<0.001	0.738-0.843	5.262	71.7	78.3
Case 2	PCT	0.764	<0.001	0.675-0.810	0.055	75.4	65.5
	CRP	0.764	<0.001	0.640-0.786	20.205	85.2	65.5
	IL-6	0.771	<0.001	0.679-0.821	17.835	80.3	60.6