Table 1. Patient demographics and clinicopathologic factors.
| Variable | n [%] or median [IQR] |
|---|---|
| Total patients | 310 [100] |
| Age (years) | 70 [61, 78] |
| Sex (M) | 173 [56] |
| BMI (kg/m2) | 26 [24, 30] |
| Neoadjuvant chemotherapy | 67 [22] |
| Concomitant vein resection | 63 [20] |
| Tumor size (cm) | 3.0 [2.1, 3.6] |
| LVI | 230 [74] |
| PNI | 277 [89] |
| Positive lymph node | 225 [73] |
| Lymph node ratio | 0.11 [0.00, 0.26] |
| Closest margin location | |
| SMV/PV groove | 141 [45] |
| Retroperitoneum/uncinate | 114 [37] |
| Pancreatic neck | 43 [14] |
| Bile duct | 7 [2] |
| Other | 5 [2] |
| Adjuvant therapy | |
| None | 67 [22] |
| Chemotherapy alone | 181 [58] |
| Chemoradiotherapy | 62 [20] |
| Recurrence | 204 [66] |
| Local | 78 [25] |
| Distant | 161 [52] |
| Death | 213 [69] |
| RFS (months) | 14 [7, 37] |
| OS (months) | 24 [13, 53] |
| Follow-up (months) | 64 [26, 87] |
IQR, interquartile range; LVI, lymphovascular invasion; PNI, perineural invasion; RFS, recurrence-free survival; OS, overall survival.