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Table 2 Predictive power of models 1 and 2 in training and validation set

From: Development and validation of a nomogram model for prolonged length of stay in spinal fusion patients: a retrospective analysis

Model

AUC

Sensitivity

Specificity

PPV

NPV

Kappa

Training set

      

Model1

0.775(0.756–0.793)

0.792(0.777–0.808)

0.637(0.604–0.670)

0.483(0.453–0.513)

0.877(0.864–0.890)

0.386(0.353–0.420)

Model2

0.761(0.742–0.780)

0.706(0.689–0.723)

0.694(0.662–0.725)

0.418(0.392–0.444)

0.883(0.870–0.897)

0.325(0.294–0.356)

Internal validation set

      

Model1

0.784(0.756–0.811)

0.632(0.582–0.683)

0.790(0.767–0.814)

0.476(0.431–0.522)

0.878(0.858–0.898)

0.378(0.327–0.429)

External validation set

      

Model1

0.795(0.764–0.826)

0.627(0.569–0.685)

0.831(0.807–0.854)

0.506(0.452–0.560)

0.889(0.869–0.910)

0.421(0.363–0.479)