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Table 3 Diagnostic validity and statistical data

From: Plaque morphology detected with Duplex ultrasound before carotid angioplasty and stenting (CAS) is not a predictor of carotid artery in-stent restenosis, a case control study

 

TPRS

Inverse TPRS

Echo-genicity

Texture

Surface

AUC (95%CI)

0.54

0.64

0.46

0.53

0.62

 

(0.36-0.72)

(0.45-0.83)

(0.25-0.67)

(0.36-0.70)

(0.50-0.74)

Cut-off

≥ 3

≥ 4

≥ 3

≥ 1

≥ 1

Sensitivity

0.70

0.80

0.20

0.60

0.90

Specificity

0.40

0.42

0.88

0.46

0.34

PPV*

0.06

0.08

0.09

0.06

0.07

PNV*

0.96

0.97

0.95

0.95

0.98

  1. *Positive and negative predictive value given the ISR prevalence of 0.06 in the overall population of CAS-treated individuals of this study.