Figure 3.

Clinical Decision Curve for the Prediction Model of Sustained Smoking Cessation in COPD Patients. The clinical decision curve is used to assess the clinical net benefit of the prediction model. The vertical axis represents the net benefit standardized, and the top horizontal axis represents the high-risk threshold. The bottom horizontal axis represents the cost-benefit ratio. The graph contains three curves: the purple line is the prediction model, indicating the net benefit if all patients underwent the prediction mo the gray line is the “intervention-all” line, indicating the net benefit if all patients received the intervention; the black line is the “intervention-none” line, indicating the net benefit if no patients received any intervention.