Factors associated with recurrence Factors Recurrence OR p Yes No Tumor location Pancreas 14 6 4, 67 1, 4 - 15, 5 0, 01 Peripancreatic 11 22 CA 19.9 ≥200 8 7 1, 8 0, 5 - 6, 0 0, 36 <200 13 20 Tumor size >3 cm 4 4 0, 88 0, 19 - 3, 9 0, 86 ≤3 cm 21 26 Level of differentiation Poor 4 0 4, 0 0, 4 - 41, 2 0, 08 High or moderate 21 28 LN metastasis Yes 17 7 6, 4 1, 9 - 21, 1 0, 002 No 8 21 No 21 25 Comment: Pancreatic head cancer and lymph node metastasis were risk factors for postoperative recurrence (p value 0.01 and 0.002, respectively).