Figure 3.

Kaplan–Meier survival curves according to the adjuvant therapy and its regimen. (A) Modalities of adjuvant therapy did not show significant survival differences. p value was 0.115 between no therapy and chemotherapy, 0.929 between chemotherapy and concurrent chemo-radiation therapy, and 0.199 between no therapy and concurrent chemo-radiation therapy. (B) In comparisons according to chemotherapy regimens, 5-fluorouracil-based chemotherapy showed better survival than no therapy (p = 0.035). However, gemcitabine-based chemotherapy did not show a significant survival difference compared with no therapy (p = 0.518) or compared with 5-fluorouracil-based chemotherapy (p = 0.196).