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Table 4 The ROC results of different factors

From: Admission prevalence of deep vein thrombosis in elderly Chinese patients with hip fracture and a new predictor based on risk factors for thrombosis screening

Risk Factors

Cut-off valuea

Sensitivity

Specificity

NPV

PPV

AUC

95% CI

SE

P-value

Gender

–

0.730

0.425

0.787

0.351

0.578

0.501–0.654

0.039

0.054

Age (years)

84.5

0.446

0.776

0.767

0.458

0.649

0.575–0.723

0.038

< 0.001

Time from injury to admission (days)

1.5

0.608

0.724

0.813

0.484

0.674

0.598–0.750

0.039

< 0.001

Fibrinogen(g/L)

4.89

0.432

0.828

0.744

0.516

0.644

0.569–0.719

0.038

< 0.001

D-dimer (μg/ml)

5.04

0.797

0.557

0.837

0.378

0.679

0.612–0.746

0.034

< 0.001

New predictor

12.74

0.919

0.667

0.951

0.540

0.852

0.806–0.898

0.023

< 0.001

  1. aThe cut-off points of scores were determined by the Youden index