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Table 5 Prediction performance of COVID-19 with different cut-off values

From: CT differential diagnosis of COVID-19 and non-COVID-19 in symptomatic suspects: a practical scoring method

Cut-off

TP

FP

TN

FN

Youden Index

Sensitivity (95%CI)

Specificity (95%CI)

PPV (95%CI)

NPV (95%CI)

> 4

17

2

41

13

0.5202

56.67 (37.4 to 74.5)

95.35 (84.2 to 99.4)

89.5 (67.9 to 97.2)

75.9 (67.6–82.7)

> 2

26

14

29

4

0.5411

86.67 (69.3 to 96.2)

67.44 (51.5 to 80.9)

65.0 (54.2–74.5)

87.9 (74.0–94.9)

> 0

30

33

10

0

0.2326

100.0 (88.4 to 100.0)

23.26 (11.8 to 38.6)

47.6 (43.5–51.7)

100.0 (−)

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BMC Pulmonary Medicine

ISSN: 1471-2466

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