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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