Table 1.
The information for postoperative pancreatic cancer patients in the training set and the test set.
| Characteristic | Training Set (n = 2804) |
Test Set (n = 795) |
p Value |
|---|---|---|---|
| Age | 65 (58, 73) | 65 (57, 72) | 0.5 |
| Race | 0.9 | ||
| White | 2215 (79%) | 629 (79%) | |
| Black | 293 (10%) | 82 (10%) | |
| Asian or Pacific Islander | 292 (10%) | 84 (11%) | |
| other | 4(0.1%) | 0 (0%) | |
| Sex | 0.5 | ||
| Male | 1432 (51%) | 396 (50%) | |
| Female | 1372 (49%) | 399 (50%) | |
| Marital status | 0.5 | ||
| Married | 2067 (74%) | 577 (73%) | |
| Single | 737 (26%) | 218 (27%) | |
| Radiation | 0.4 | ||
| Yes | 998 (36%) | 271 (34%) | |
| No | 1806 (64%) | 524 (64%) | |
| Chemotherapy | 0.2 | ||
| Yes | 1862 (66%) | 508 (64%) | |
| No | 942 (34%) | 287 (36%) | |
| Histological type | 0.5 | ||
| Epithelial neoplasms | 56 (2.0%) | 9 (1.1%) | |
| Adenomas and adenocarcinomas | 1435 (51%) | 413 (52%) | |
| Cystic, mucinous, and serous | 130 (4.6%) | 32 (4.0%) | |
| Ductal and lobular neoplasms | 1144 (41%) | 332 (42%) | |
| Complex epithelial neoplasms | 39 (1.4%) | 9 (1.1%) | |
| Surgery | 0.1 | ||
| Local excision | 5 (0.2%) | 5 (0.6%) | |
| Partial pancreatectomy | 464 (17%) | 118 (15%) | |
| Local or partial pancreatectomy and duodenectomy | 1882 (67%) | 537 (68%) | |
| Total pancreatectomy | 79 (2.8%) | 32 (4.0%) | |
| Total pancreatectomy and subtotal gastrectomy or duodenectomy | 221 (7.9%) | 68 (8.6%) | |
| Extended pancreatoduodenectomy | 132 (4.7%) | 33 (4.2%) | |
| Pancreatectomy | 21 (0.7%) | 2 (0.3%) | |
| AJCC stage | >0.9 | ||
| I | 357 (13%) | 103 (13%) | |
| II | 2185 (78%) | 621 (78%) | |
| III | 102 (3.6%) | 26 (3.3%) | |
| IV | 160 (5.7%) | 45 (5.7%) | |
| T stage | 0.7 | ||
| T1 | 204 (7.3%) | 55 (6.9%) | |
| T2 | 449 (16%) | 115 (14%) | |
| T3 | 2039 (73%) | 594 (75%) | |
| T4 | 112 (4.0%) | 31 (3.9%) | |
| N stage | 0.1 | ||
| N0 | 942 (34%) | 294 (37%) | |
| N1 | 1862 (66%) | 501 (63%) | |
| M stage | >0.9 | ||
| M0 | 2644 (94.3%) | 750 (94.3%) | |
| M1 | 160 (5.7%) | 45 (5.7%) | |
| Site | 0.4 | ||
| Pancreas Head | 1969 (70%) | 572 (72%) | |
| Pancreas Body Tail | 566 (20%) | 158 (20%) | |
| Other | 269 (9.6%) | 65 (8.2%) | |
| Clinical grade | 0.2 | ||
| I | 449 (16%) | 108 (14%) | |
| II | 1315 (47%) | 394 (50%) | |
| III | 985 (35%) | 283 (36%) | |
| IV | 55 (2.0%) | 10 (1.3%) | |
| Tumor size (mm) | 32 (25, 45) | 32 (25, 42) | 0.5 |
| Examined lymph nodes | 14 (9, 21) | 14 (9, 21) | 0.6 |
| Positive lymph nodes | 1 (0, 3) | 1 (0, 4) | 0.2 |
| Positive lymph nodes rate (%) | 0.10 (0.00, 0.25) | 0.08 (0.00, 0.25) | 0.2 |
Notes: AJCC: American Joint Committee on Cancer