Fig. 4

Stratified overall survival analysis according to: a, Type of neoadjuvant chemotherapy (FOLFIRINOX versus other regimens); b, Tumor response grading system of the College of American Pathologists (CAP) after neoadjuvant chemotherapy (0: no viable cancer cells; 1: single cells or rare small groups of cancer cells; 2: residual cancer with evident tumor regression, but more than single cells or rare small groups of cancer cells; 3: extensive residual cancer with no evident tumor regression); c, R-status; d, Lymph node ratio