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Table 3 Binary classification performance of the topical detectors and radiological analysis

From: Development of a classifier for [18F]fluorodeoxyglucose extravasation severity using semi-quantitative readings from topically applied detectors

Diagnostic metric

Topical detectors (QIBA threshold)

Topical detectors (optimal threshold)

Radiologist

TP

4

4

5

TN

17

19

6

FP

2

0

13

FN

1

1

0

Sensitivity (%)

80.0

80.0

100.0

Specificity (%)

89.5

100.0

31.6

Accuracy (%)

87.5

95.8

45.8

PPV (%)

66.7

100.0

27.8

NPV (%)

94.4

95.0

100.0

MCC

0.65*

0.87*

0.30

  1. *Significantly different from the radiologist metric based on the jackknife estimate of standard error and Student’s t-test