Table 3.

ROC Curve Parameters for Vital Signs, Laboratory Indices, and Severity Scores for Disease

Variable	AUC (95% CI)	Cut Off-value	Z-value	Youden Index	P value	Sensitivity (%)	Specificity (%)
Vital signs
Systolic blood pressure	0.72 (0.66–0.77)	114.00	5.54	0.36	<0.001	66.20	70.10
Diastolic blood pressure	0.85 (0.80–0.89)	61.00	11.74	0.63	<0.001	75.40	87.70
Respiratory rate	0.61 (0.55–0.67)	20.00	2.47	0.25	0.044	43.10	82.40
Pulse	0.68 (0.62–0.74)	102.00	4.30	0.30	<0.001	49.20	80.80
Laboratory indices
Blood urea nitrogen	0.82 (0.76–0.86)	8.39	9.07	0.57	<0.001	75.40	81.30
Severity scores for disease
Pitt score	0.86 (0.81–0.90)	3.00	13.22	0.59	<0.001	69.20	89.30
SOFA score	0.82 (0.77–0.87)	7.00	9.61	0.53	<0.001	61.50	91.40
CURB-65 score	0.94 (0.90–0.97)	1.00	27.70	0.73	<0.001	90.80	82.40

Notes: P<0.05 represented the results achieved statistical significance.

Abbreviations: AUC, Area Under The Curve; CI, confidence interval; Pitt score, Pitt bacteremia score; SOFA, sequential organ failure assessment.