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

Figure 2

(a) Nomogram model predicts the probability of POD. (b) Calibration plot of the nomogram. The nomogram was calibrated for the probability of being POD (bootstrap 1000 repetitions). (c) The discrimination assessed by ROC curve. The AUC is 0.821 (95% CI 0.760~0.883). POD: postoperative delirium; ROC: receiver operating characteristic; AUC: area under the curve; CI: confidence interval.

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