Table 3.
Patient and tumor characteristics of the 2318 patients who underwent R0 resection.
| All Patients (n = 2318) |
Training Set (n = 1551) |
Test Set (n = 767) |
|
|---|---|---|---|
|
| |||
| FACTOR | n (%) | ||
| Gender | |||
|
| |||
| Female | 1197 (52) | 804 (52) | 393 (51) |
|
| |||
| Male | 1121 (48) | 747 (48) | 374 (49) |
|
| |||
| Age, median | 68 years | 68 years | 68 years |
|
| |||
| Operation | |||
| Pancreaticoduodenectomy | 1792 (77) | 1194 (77) | 598 (78) |
| Distal pancreatectomy | 435 (19) | 293 (19) | 142 (19) |
| Total pancreatectomy | 48 (2) | 37 (2) | 11 (1) |
| Other | 43 (2) | 27 (2) | 16 (2) |
|
| |||
| Tumor Size, median | 3 cm (0.1 – 30) | 3 cm (0.1 – 18) | 3 cm (0.1 – 30) |
|
| |||
| T Stage (7th edition AJCC) | |||
|
| |||
| T1 | 189 (8) | 128 (8) | 61 (8) |
|
| |||
| T2 | 375 (16) | 247 (16) | 128 (17) |
|
| |||
| T3 | 1754 (76) | 1176 (76) | 578 (75) |
|
| |||
| Total nodes assessed, median | 18 (1 – 100) | 18 (1 – 100) | 18 (1 – 58) |
|
| |||
| # positive nodes, median | 2 (0 – 35) | 1 (0 – 35) | 2 (0 – 19) |
|
| |||
| N Stage | |||
|
| |||
| N0 | 767(33) | 525 (34) | 242 (32) |
|
| |||
| N1 | 1551 (67) | 1026 (66) | 525 (68) |
|
| |||
| AJCC Stage | |||
|
| |||
| IA | 107 (5) | 70 (5) | 37 (5) |
|
| |||
| IB | 157 (7) | 102 (7) | 55(7) |
|
| |||
| IIA | 501 (22) | 352 (23) | 149 (19) |
|
| |||
| IIB | 1521 (66) | 1001 (65) | 520 (68) |
|
| |||
| III | 0 (0) | 0 (0) | 0 (0) |
|
| |||
| IV | 32 (1) | 26 (2) | 6 (1) |
|
| |||
| Center | |||
|
| |||
| Center 1 | 1050 (45) | 703 (45) | 347 (45) |
|
| |||
| Center 2 | 731 (32) | 489 (32) | 242 (32) |
|
| |||
| Center 3 | 537 (23) | 359 (23) | 178 (23) |
R0, negative margin; AJCC, American Joint Committee on Cancer