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Factors Influencing the Number of Assessed Lymph Nodes
| (Parameter) | Median Number of LNs | P value |
|---|---|---|
| Time period | ||
| 1993–1997 (105) | 9 | <0.001 |
| 1998–2002 (161) | 13 | |
| 2003–2008 (251) | 15 | |
| Operation | ||
| Whipple (436) | 14 | 0.1 |
| Distal pancreatectomy (73) | 12 | |
| Total pancreatectomy (8) | 19 | |
| Tumor stage | ||
| Intrapancreatic (T1,T2) (59) | 13 | 0.26 |
| Extrapancreatic (T3) (458) | 14 | |
| Nodal status | ||
| N0 (168) | 10 | <0.001 |
| N1 (349) | 15 | |
