Variables | No NRT | NRT | P |
---|---|---|---|
N | 3288 (62.4%) | 1984 (37.6%) | Â |
Age (years) | 62.0 ± 12.4 | 61.4 ± 10.2 | 0.01 |
Male (%) | 2106 (64.1%) | 1655 (83.4%) | <  0.001 |
Year of diagnosis |  |  | <  0.001 |
 2004–2009 | 1321 (40.2%) | 646 (32.6%) |  |
 2010–2015 | 1967 (59.8%) | 1338 (67.4%) |  |
Race/Ethnicity |  |  | <  0.001 |
 Non-Hispanic White | 1487 (45.2%) | 1637 (82.5%) |  |
 Black | 431 (13.1%) | 73 (3.7%) |  |
 Hispanic White | 692 (21.0%) | 153 (7.7%) |  |
 Asian/Pacific Islanders | 618 (18.8%) | 95 (4.8%) |  |
 American Indian/Alaska Native | 43 (1.3%) | 25 (1.3%) |  |
 Unknown | 17 (0.5%) | 1 (0.1%) |  |
Tumor differentiation |  |  | <  0.001 |
 Well differentiated | 71 (2.2%) | 86 (4.3%) |  |
 Moderately differentiated | 659 (20.0%) | 649 (32.7%) |  |
 Poorly differentiated | 2323 (70.7%) | 1007 (50.8%) |  |
 Undifferentiated | 59 (1.8%) | 37 (1.9%) |  |
 Unknown | 176 (5.4%) | 205 (10.3%) |  |
Tumor size |  |  | <  0.001 |
  ≤ 3 cm | 755 (23.0%) | 534 (26.9%) |  |
 3.1–5 cm | 808 (24.6%) | 552 (27.8%) |  |
  > 5 cm | 1273 (38.7%) | 422 (21.3%) |  |
 Unknown | 452 (13.7%) | 476 (24.0%) |  |
Location |  |  | <  0.001 |
 Cardia | 783 (23.8%) | 1833 (92.4%) |  |
 Fundus | 118 (3.6%) | 8 (0.4%) |  |
 Body | 343 (10.4%) | 24 (1.2%) |  |
 Antrum | 753 (22.9%) | 32 (1.6%) |  |
 Pylorus | 124 (3.8%) | 5 (0.3%) |  |
 Less curvature | 383 (11.6%) | 33 (1.7%) |  |
 Greater curvature | 145 (4.4%) | 9 (0.5%) |  |
 Overlapping/NOS | 639 (19.4%) | 40 (2.0%) |  |
Lauren classification |  |  | <  0.001 |
 Intestinal | 1988 (60.5%) | 1607 (81.0%) |  |
 Diffuse | 1083 (32.9%) | 271 (13.7%) |  |
 Unclassified | 217 (6.6%) | 106 (5.3%) |  |
No. of LNs examined |  |  | <  0.001 |
  < 15 | 1225 (37.3%) | 1065 (53.7%) |  |
  ≥ 15 | 2063 (62.7%) | 919 (46.3%) |  |
Pathologic T stage |  |  | <  0.001 |
 T1 | 357 (10.9%) | 195 (9.8%) |  |
 T2 | 1762 (53.6%) | 1116 (56.3%) |  |
 T3 | 854 (26.0%) | 590 (29.7%) |  |
 T4 | 315 (9.6%) | 83 (4.2%) |  |
Pathologic N stage |  |  | <  0.001 |
 N0 | 897 (27.3%) | 643 (32.4%) |  |
 N1 | 1459 (44.4%) | 1129 (56.9%) |  |
 N2 | 629 (19.1%) | 183 (9.2%) |  |
 N3 | 303 (9.2%) | 29 (1.5%) |  |
AJCC 8th TNM stage |  |  | <  0.001 |
 I | 835 (25.4%) | 543 (27.4%) |  |
 II | 1661 (50.5%) | 1265 (63.8%) |  |
 III | 792 (24.1%) | 176 (8.9%) |  |
Surgery type |  |  | <  0.001 |
 Partial gastrectomy | 1980 (60.2%) | 1150 (58.0%) |  |
 Near total/total gastrectomy | 1091 (33.2%) | 409 (20.6%) |  |
 Gastrectomy, NOS | 217 (6.69%) | 425 (21.4%) |  |