Table 1 Clinicopathologic characteristics of patients
Clinicopathologic variable | Mean (SD)/ Frequency (%) n = 4049 |
|---|---|
Age, in years | |
 Mean, SD | 57.6 (11.9) |
  < 65 years | 2722 (67.2%) |
  ≥ 65 years | 1327 (32.8%) |
Sex | |
 Male | 2694 (66.5%) |
 Female | 1355 (33.5%) |
BMI, in kg/m2 | 23.7 (3.1) |
ASA | |
 I | 1540 (38.0%) |
 I | 1991 (49.2%) |
 III | 187 (4.6%) |
 Unknown | 331 (8.2%) |
pT size, in cm | 4.6 (2.8) |
pT category | |
 T1 | 2049 (50.6%) |
 T2 | 595 (14.7%) |
 T3 | 787 (19.4%) |
 T4 | 618 (15.3%) |
pN category | |
 N0 | 2465 (60.9%) |
 N1 | 550 (13.6%) |
 N2 | 440 (10.9%) |
 N3 | 594 (14.7%) |
Total number of pathologically positive lymph nodes | 2.8 (6.3) |
Total number of lymph nodes examined | |
 Mean, SD | 42.9 (15.9) |
 0–30 | 889 (22.0%) |
 31–45 | 1597 (39.4%) |
  > 45 | 1563 (38.6%) |
pStage | |
 IA | 1815 (44.8%) |
 IB | 501 (12.4%) |
 IIA | 423 (10.4%) |
 IIB | 330 (8.2%) |
 IIIA | 303 (7.5%) |
 IIIB | 341 (8.4%) |
 IIIC | 336 (8.3%) |
Tumor location | |
 Proximal | 683 (16.9%) |
 Middle | 1370 (33.8%) |
 Distal | 1916 (47.3%) |
 Whole | 80 (2.0%) |
Histologic gradea | |
 Differentiated | 1542 (38.1%) |
 Undifferentiated | 2456 (60.7%) |
 Others | 49 (1.2%) |
 Unknown | 2 (0.05%) |
Borrmann type | |
 0 | 2214 (54.7%) |
 I | 51 (1.3%) |
 II | 374 (9.2%) |
 III | 1269 (31.3%) |
 IV | 121 (3.0%) |
 V | 19 (0.5%) |
 Unknown | 1 (0.02%) |
Lauren type | |
 Intestinal | 1899 (46.9%) |
 Diffuse | 1644 (40.6%) |
 Mixed | 359 (8.9%) |
 Indeterminate/Unknown | 147 (3.6%) |
Lymphovascular invasion | |
 Present | 1596 (39.4%) |
 Absent | 2340 (57.8%) |
 Unknown | 113 (2.8%) |
Perineural invasion | |
 Present | 948 (23.4%) |
 Absent | 2293 (56.6%) |
 Unknown | 808 (20.0%) |
Resection type | |
 Subtotal | 2892 (71.4%) |
 Total | 988 (24.4%) |
 Extended | 169 (4.2%) |
Extent of lymph node dissection | |
 D1 | 126 (3.1%) |
 D2 | 3867 (95.5%) |
  > D2 | 46 (1.1%) |
 Unknown | 10 (0.2%) |
Adjuvant chemotherapyb | |
 Yes | 1002 (24.7%) |
 No | 3012 (74.4%) |
 Unknown | 35 (0.9%) |