Fig. 2

K-M survival curve after PSM

Note: (A) K-M survival curves of the OS of the SKN2 and non-SKN2 groups, (B) K-M survival curves of the DFS of the SKN2 and non-SKN2 groups. (C) K-M survival curves of the OS of the four subgroups N2a1, N2a2, N2b1, and N2b2; (D) K-M survival curves of DFS of the four subgroups N2a1, N2a2, N2b1, and N2b2. N2a1: single-station SKN2, N2a2: multi-station SKN2, N2b1: single-station non-SKN2, N2b2: multi-station non-SKN2