Table 1 Characteristics of patients

Age (years)

65 (57-72)

64 (61-66)

0.466

Gender

0.013

 Male

187 (85.8%)

31 (14.2%)

 Female

192 (93.2%)

14 (6.8%)

Anemia

0.117

 Yes

189 (87.1%)

28 (12.9%)

 No

190 (91.8%)

17 (8.2%)

Preoperative obstruction

0.356

 Yes

109 (91.6%)

10 (8.4%)

 No

270 (88.5%)

35 (11.5%)

Hypertension

0.779

 Yes

74 (90.2%)

8 (9.8%)

 No

305 (89.2%)

37 (10.8%)

Diabetes

0.623

 Yes

49 (87.5%)

7 (12.5%)

 No

330 (89.7%)

38 (10.3%)

BMI (kg/m²)

0.356

 ≤ 25

261 (88.5%)

34 (11.5%)

 > 25

118 (91.5%)

11 (8.5%)

Emergency operation

0.087

 Yes

29 (80.6%)

7 (19.4%)

 No

350 (90.2%)

38 (9.8%)

History of abdominal surgery

0.026

 Yes

47 (81.0%)

11 (19.0%)

 No

332 (90.7%)

34 (9.3%)

Surgical medial boundary

0.347

 SMV

316 (90.0%)

35 (10.0%)

 SMA

63 (86.3%)

10 (13.7%)

Neoadjuvant therapy

0.288

 Yes

8 (80.0%)

2 (20.0%)

 No

371 (89.6%)

43 (10.4%)

ASA score

0.676

 1 or 2

284 (89.0%)

35 (11.0%)

 ≥ 3

95 (90.5%)

10 (9.5%)

Type of surgery

0.365

 Standard

269 (90.3%)

29 (9.7%)

 Extended

110 (87.3%)

16 (12.7%)

Surgical approach

0.012

 Open

67 (81.7%)

15 (18.3%)

 Laparoscopy

312 (91.2%)

30 (8.8%)

Blood loss (mL)

60 (50–100)

50 (50–95)

0.461

Operative time (min)

150 (135–165)

155 (145–172)

0.002

Tumor diameter (cm)

5.0 (4.0–6.5)

4.1 (2.6–7.6)

0.159

Preoperative NLR

2.5 (1.7–3.9)

2.2 (1.5–3.1)

0.059

Preoperative albumin

39.1 (35.1–43.1)

37.2 (33.7–41.0)

0.029

Preoperative CEA

3.9 (2.1–13.1)

4.5 (4.0–6.0)

0.739

Pathological T stage

0.296

 T0–T2

37 (82.2%)

8 (17.8%)

 T3–T4

342 (90.2%)

37 (9.8%)

Pathological N stage

0.670

 N0

181 (88.7%)

23 (11.3%)

 N1–N2

198 (90.0%)

22 (10.0%)

Metastasis

0.768

 Yes

29 (87.9.%)

4 (12.1%)

 No

350 (89.5%)

41 (10.5%)

Anastomotic leakage

0.024

 Yes

22 (75.9.%)

7 (24.1%)

 No

357 (90.4%)

38 (9.6%)

Incision infection

0.979

 Yes

50 (89.3%)

6 (10.7%)

 No

329 (89.4%)

39 (10.6%)