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Table 5 Diagnostic efficacy of ROC curves for 168 lymph nodes with a short-axis diameter equal to or more than 5 mm at the largest Youden index

From: Non-invasive MR assessment of the microstructure and microcirculation in regional lymph nodes for rectal cancer: a study of intravoxel incoherent motion imaging

Parameter

AUC(95% CI)

Youden index

Cutoff value

Sensitivity

Specificity

D

0.751 (0.679~0.815)

0.415

0.592 × 10−3 mm2/s

85.90%

55.56%

f

0.665 (0.589~0.736)

0.304

0.244

94.87%

35.56%

S

0.670 (0.594~0.741)

0.255

6.510 mm

57.69%

67.78%

L

0.676 (0.599~0.746)

0.303

6.870 mm

76.92%

53.33%

D + f + S

0.811 (0.744~0.868)

0.506

0.555

62.82%

87.78%

  1. Note: ROC receiver operating characteristic, AUC area under curve, S short-axis diameter, L long-axis diameter, D pure diffusion coefficient, D* pseudo-diffusion coefficient, f perfusion factor, D + f + S the multi-parameter model comprising D, f and short-axis diameter
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Cancer Imaging

ISSN: 1470-7330

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