Table 2 Relationship between tumor and surgical features and outcomes

Histological grade (well/mod/poor)

54 (35.8 %)/83 (55.0 %)/14 (9.2 %)

19 (35.8 %)/28 (52.8 %)/6 (11.4 %)

0.99

Lymphatic invasion (no/yes)

6 (4.0 %)/145 (96.0 %)

6 (11.3 %)/47 (88.7 %)

0.02

Vessel invasion (no/yes)

20 (13.2 %)/131 (86.8 %)

7 (13.2 %)/46 (86.8 %)

0.99

Operation time (min)

480 (80–713)

241 (74–645)

0.35

Blood loss (g)

185 (10–1400)

129 (20–510)

0.07

Laparoscopic surgery (no/yes)

83 (55.0 %)/69 (45.0 %)

31 (58.5 %)/22 (41.5 %)

0.62

Composite resection (no/yes)

143 (94.7 %)/8 (5.3 %)

48 (90.6 %)/5 (9.4 %)

0.38

Postoperative chemotherapy (no/yes)

36 (23.8 %)/115 (76.2 %)

32 (60.4 %)/21 (39.6 %)

<0.01

Postoperative complication (no/yes)

95 (62.9 %)/56 (37.1 %)

32 (60.4 %)/21 (39.6 %)

0.74

Hospital stay (days)

25.7 (14–31)

25.5 (16–40)

0.93