Table 2 Tumor characteristics between complication and control groups.
Complication group (n = 301), n (%) | Control group (n = 2207), n (%) | Statistic | P value | |
|---|---|---|---|---|
Location | 3.536 | 0.316 | ||
Upper | 90 (29.9) | 648 (29.4) | ||
Middle | 30 (10.0) | 156 (7.1) | ||
Lower | 166 (55.1) | 1283 (58.1) | ||
Multiple parts | 15 (5.0) | 120 (5.4) | ||
Number of tumors | 0.005 | 0.945 | ||
Single | 291 (96.7) | 2132 (96.6) | ||
Multiple (≥ 2) | 10 (3.3) | 75 (3.4) | ||
Histological types | 0.251 | 0.882 | ||
Differentiated | 64 (21.3) | 480 (21.7) | ||
Mixed | 89 (29.6) | 622 (28.2) | ||
Undifferentiated | 148 (49.2) | 1105 (50.1) | ||
T stage | 0.964 | 0.810 | ||
T1 | 71 (23.6) | 574 (26.0) | ||
T2 | 48 (15.9) | 357 (16.2) | ||
T3 | 77 (25.6) | 531 (24.1) | ||
T4 | 105 (34.9) | 745 (33.8) | ||
N stage | 2.999 | 0.392 | ||
N0 | 128 (42.5) | 1021 (46.3) | ||
N1 | 43 (14.3) | 346 (15.7) | ||
N2 | 56 (18.6) | 371 (16.8) | ||
N3 | 74 (24.6) | 469 (21.3) | ||
Ulceration | 1.537 | 0.215 | ||
Absence | 54 (17.9) | 464 (21.0) | ||
Presence | 247 (82.1) | 1743 (79.0) | ||
NED | 0.041 | 0.839 | ||
Absence | 287 (95.3) | 2110 (95.6) | ||
Presence | 14 (4.7) | 97 (4.4) | ||
LVI | 1.119 | 0.290 | ||
Absence | 226 (75.1) | 1717 (77.8) | ||
Presence | 75 (24.9) | 490 (22.2) | ||
Nerve invasion | 0.230 | 0.632 | ||
Absence | 244 (81.1) | 1814 (82.2) | ||
Presence | 57 (18.9) | 393 (17.8) |
