Figure 2. Kaplan–Meier survival curves. (A) Disease-free survival (DFS) in the younger (age <70 years, n=726) and older (age ≥70 years, n=190) age groups (p=0.186). In the younger group, the median DFS was 9.8 months, and the 1-, 3-, and 5-year DFS rates were 42.5%, 20.9%, and 17.8%, respectively. In the older group, the median DFS was 8.8 months, and the 1-, 3-, and 5-year DFS rates were 36.1%, 18.3%, and 14.7%, respectively. (B) Overall survival (OS) between the younger and older groups (p<0.001). The median follow-up period for the 916 patient was 22.0 months. In the younger group, the median OS was 23.5 months, and the 1-, 3-, and 5-year survival rates were 78.8%, 35.1%, and 25.2%, respectively. In the older group, the median OS was 16.7 months, and the 1-, 3-, and 5-year survival rates were 66.8%, 23.4%, and 16.3%, respectively.