Risk Factors and a Nomogram Model Establishment for Postoperative Delirium in Elderly Patients Undergoing Arthroplasty Surgery: A Single-Center Retrospective Study

Figure 3

Decision curve analysis (DCA) for nomogram established to predict POD. The -axis measured the net benefit. The thick black line represents the net benefit of no patient suffering POD. The thin grey line shows the net benefit of all patients suffering POD.