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Table 3 Performance indexes for the nomogram prediction model

From: Preoperative prediction model for microvascular invasion in HBV-related intrahepatic cholangiocarcinoma

Performance index

Training cohort

Validation cohort

Area under ROC curve

0.874

0.729

Cut-off score

142

139

R2

0.470

0.281

Brier scores

0.098

0.115

Specificity, %

77.25

71.02

Sensitivity, %

87.80

65.15

Negative predictive value, %

96.30

91.60

Positive predictive value, %

48.60

29.70

Negative likelihood ratio

0.16

0.49

Positive likelihood ratio

3.86

2.25

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BMC Surgery

ISSN: 1471-2482

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