Overall survival and recurrence free survival comparisons for the entire cohort. (A) OS comparison for the entire cohort. The median OS in the group that received adjuvant chemotherapy was 2.7 years (CI, 1.6–3.7) compared to 3 years (CI, 3.3–5.3) in the group that did not (P=0.924); (B) RFS comparison for the entire cohort. Median RFSs were 2.2 years (CI, 1.8–2.6) and 3.3 years (CI, 2.3–4.3) for patients given adjuvant therapy and those who were not, respectively (P=0.874). The hash marks indicate censored events. OS, overall survival; RFS, recurrence free survival.