Fig. 5
Calibration curve and decision curve. (A) Calibration curve. The horizontal axis represents the probability of lymph node metastasis predicted by the nomogram model, and the vertical axis represents the actual clinical observations. The Ideal diagonal dashed line represents the ideal line; the Apparent is the model’s prediction line; the Bias-corrected solid line is the calibration curve obtained after repeated bootstrapping. The alignment of these lines indicates good calibration. (B) Decision curve analysis. The horizontal axis represents threshold probability (indicating the proportion of patients with lymph node metastasis), and the vertical axis represents net benefit. The red curve represents the efficacy of lymph node metastasis prediction using the nomogram model. The yellow arc represents all patients having lymph node metastasis, and the green horizontal line represents no lymph node metastasis in all patients.
