Fig. 6

A, B Decision curve analysis of predicted nomogram in the training cohort (A) and validation cohort (B). The y-axis measures the net benefit, the black line represents the hypothesis that no lymph node metastasis has occurred in invasive lung adenocarcinoma within 2 cm, and the gray line represents the hypothesis that lymph node metastasis has occurred in invasive lung adenocarcinoma measuring ≤ 2 cm. The blue line in Fig. 6A represents the training cohort, and the red line in Fig. 6B represents the validation cohort