Table 2. Performance Metrics for Classification of Admission (All Sepsis vs Nonsepsis).

All sepsis classification (n = 1663)	Performance metric (95% CI)
	Accuracy	Sensitivity	Specificity	False negativea	False positiveb	Balanced accuracyc	Diagnostic odds ratiod
PSS ≥5	0.54 (0.54-0.55)	0.95 (0.93-0.96)	0.53 (0.53-0.54)	0.05 (0.04-0.07)	0.47 (0.46-0.47)	0.74 (0.73-0.74)	19.82 (16.01-24.52)
PSS ≥6	0.63 (0.62-0.63)	0.92 (0.91-0.93)	0.62 (0.61-0.62)	0.08 (0.07-0.09)	0.38 (0.38-0.39)	0.77 (0.76-0.78)	18.63 (15.59-22.26)
PSS ≥7	0.69 (0.69-0.69)	0.89 (0.87-0.90)	0.68 (0.68-0.69)	0.11 (0.10-0.13)	0.32 (0.31-0.32)	0.79 (0.78-0.79)	17.44 (14.94-20.34)
PSS ≥8	0.74 (0.73-0.74)	0.85 (0.83-0.87)	0.73 (0.73-0.74)	0.15 (0.13-0.17)	0.27 (0.26-0.27)	0.79 (0.78-0.80)	15.96 (13.92-18.30)
PSS ≥9	0.78 (0.77-0.78)	0.82 (0.80-0.84)	0.77 (0.77-0.78)	0.18 (0.16-0.20)	0.23 (0.22-0.23)	0.80 (0.79-0.81)	15.78 (13.90-17.91)
PSS ≥10	0.81 (0.80-0.81)	0.78 (0.76-0.80)	0.81 (0.80-0.81)	0.22 (0.20-0.24)	0.19 (0.19-0.20)	0.80 (0.79-0.81)	15.10 (13.41-16.99)
SIRS	0.43 (0.43-0.44)	0.95 (0.94-0.96)	0.42 (0.41-0.42)	0.05 (0.04-0.06)	0.58 (0.58-0.59)	0.68 (0.68-0.69)	13.49 (10.82-16.81)
qSOFA	0.70 (0.69-0.70)	0.83 (0.81-0.85)	0.69 (0.69-0.70)	0.17 (0.15-0.19)	0.31 (0.30-0.31)	0.76 (0.75-0.77)	11.08 (9.73-12.61)
SOFA	0.45 (0.44-0.45)	0.97 (0.97-0.98)	0.43 (0.43-0.44)	0.03 (0.02-0.03)	0.57 (0.56-0.57)	0.70 (0.70-0.71)	28.60 (21.12-38.73)

Abbreviations: PSS, Predicting Sepsis Score; qSOFA, quick Sepsis-Related Organ Failure Assessment; SIRS, Systemic Inflammatory Response Syndrome; SOFA, Sequential Organ Failure Assessment.

^a False negative indicates the proportion of missed true sepsis cases.

^b False positive indicates the proportion of nonsepsis cases falsely classified as sepsis.

^c Balanced accuracy is calculated as sensitivity plus specificity divided by 2.

^d Diagnostic odds ratio is calculated as the positive likelihood ratio divided by the negative likelihood ratio.