Table 3.

Stratification analysis based on different diagnostic cutoff of procalcitonin

Cutoff of procalcitonin (ng/ml)	Sensitivity	Specificity	Positive likelihood ratio	Negative likelihood ratio	Diagnostic odds ratio	Area under curve
≥0.1	0.72 (0.65–0.79)	0.90 (0.87–0.93)	3.87 (2.53–5.90)	0.39 (0.22–0.70)	13.13 (6.46–26.66)	0.88
≥0.2	0.70 (0.62–0.77)	0.91 (0.88–0.93)	4.32 (2.39–7.78)	0.43 (0.25–0.74)	10.50 (5.87–18.80)	0.83
≥0.3	0.68 (0.60–0.76)	0.91 (0.88–0.94)	4.67 (2.06–10.62)	0.48 (0.29–0.79)	9.44 (5.24–17.03)	0.82
≥0.4	0.49 (0.33–0.65)	0.96 (0.94–0.98)	7.83 (3.20–19.14)	0.58 (0.37–0.91)	16.05 (4.97–51.86)	0.93
≥0.5	0.49 (0.33–0.65)	0.96 (0.94–0.98)	7.83 (3.20–19.14)	0.58 (0.37–0.91)	16.05 (4.97–51.86)	0.93