Table 3 Patient and cancer characteristics by number of lymph nodes removed. Incident non-metastatic colon cancer cases who underwent surgery, Emilia-Romagna, Italy, 2000–2012
From: Colon cancer survival differs from right side to left side and lymph node harvest number matter
Variable | Total | No lymphadenectomy | LN h < 12 | LN h 12–21 | LN h > 21 | P-valuec | ||||
|---|---|---|---|---|---|---|---|---|---|---|
N. | N. (%) | N. (%) | N. (%) | N. (%) | ||||||
23,269 | 3330 | (14.3) | 5533 | (23.8) | 9107 | (39.1) | 5299 | (22.8) | ||
Site | < 0.001 | |||||||||
Left | 15,006 | 2759 | (18.4) | 4200 | (27.9) | 5481 | (36.5) | 2566 | (17.1) | |
Right | 6962 | 451 | (6.5) | 992 | (14.3) | 3127 | (44.9) | 2392 | (34.4) | |
Transverse | 1301 | 120 | (9.2) | 341 | (26.2) | 499 | (38.4) | 341 | (26.2) | |
Sex | < 0.001 | |||||||||
Male | 12,936 | 1866 | (14.4) | 3218 | (24.9) | 5121 | (38.6) | 2731 | (21.1) | |
Female | 10,333 | 1464 | (14.2) | 2315 | (22.4) | 3986 | (38.6) | 2568 | (24.9) | |
(Histological type) | < 0.001 | |||||||||
Carcinoma NOSa | 256 | 204 | (79.7) | 22 | (8.6) | 20 | (7.8) | 10 | (3.9) | |
Adenocarcinoma | 21,142 | 3053 | (14.4) | 5109 | (24.2) | 8247 | (39.0) | 4733 | (22.4) | |
Mucinous | 1822 | 69 | (3.8) | 396 | (21.7) | 824 | (45.2) | 533 | (29.3) | |
Other | 49 | 4 | (8.2) | 6 | (12.2) | 16 | (32.7) | 23 | (46.9) | |
Screening status | < 0.001 | |||||||||
Uninvited | 1073 | 108 | (10.1) | 237 | (22.1) | 417 | (38.9) | 311 | (29.0) | |
Screen-detected + ICb | 4263 | 631 | (14.8) | 1059 | (24.8) | 1667 | (39.1) | 906 | (21.2) | |
Non-attendees | 2552 | 282 | (11.1) | 453 | (17.7) | 1022 | (40.1) | 795 | (31.2) | |
Stage | < 0.001 | |||||||||
Stage I | 6315 | 1358 | (21.5) | 2042 | (32.3) | 2051 | (32.5) | 864 | (13.7) | |
Stage II | 7755 | 65 | (0.8) | 1721 | (22.2) | 3622 | (46.7) | 2347 | (30.3) | |
Stage III | 7174 | 57 | (0.8) | 1680 | (23.4) | 3370 | (47.0) | 2067 | (28.8) | |
Unknown | 2025 | 1850 | (91.4) | 90 | (4.4) | 64 | (3.2) | 21 | (1.04) | |
Grade | < 0.001 | |||||||||
G1 | 2492 | 657 | (26.4) | 676 | (27.1) | 747 | (30.0) | 412 | (16.5) | |
G2 | 13,142 | 877 | (6.7) | 3327 | (25.3) | 5721 | (43.5) | 3217 | (24.5) | |
G3–4 | 4657 | 256 | (5.5) | 967 | (20.8) | 2048 | (44.0) | 1386 | (29.8) | |
Unknown | 2978 | 1540 | (51.7) | 563 | (18.9) | 591 | (19.9) | 284 | (9.5) | |