Development and Validation of Nomograms to Assess Risk Factors and Overall Survival Prediction for Lung Metastasis in Young Patients with Osteosarcoma: A SEER-Based Study

Figure 2

The receiver operating characteristic curve of the nomogram in the training set (a), internal validation set (b), and external validation set (c). Comparison of the values of the area under the curve between the nomogram and single independent risk factors in the training set (d), internal validation set (e), and external validation set (f).

(a)

(b)

(c)

(d)

(e)

(f)