Table 2 Comparison between higher lactate and lower lactate

Age, year

73.2 ± 6.1

73.0 ± 6.0

0.575

Sex

< 0.01*

 Male

 Female

806 (61.3%)

509 (38.7%)

76 (48.1%)

82 (51.9%)

BMI, kg/m²

22.6 ± 3.3

21.5 ± 3.2

< 0.01*

Smoking

487 (37.0%)

51 (32.3%)

0.241

Drinking

399 (30.3%)

36 (22.8%)

0.049*

Hypertension

495 (37.6%)

59 (37.3%)

0.941

T2DM

243 (18.5%)

16 (10.1%)

< 0.01*

CHD

119 (9.0%)

11 (7.0%)

0.382

Open surgery

147 (11.2%)

32 (20.3%)

< 0.01*

Tumor location

0.302

 Colon

667 (50.7%)

87 (55.1%)

 Rectum

648 (49.3%)

71 (44.9%)

TNM stage

0.807

 I

222 (16.9%)

24 (15.2%)

 II

555 (42.2%)

73 (46.2%)

 III

471 (35.8%)

53 (33.5%)

 IV

67 (5.1%)

8 (5.1%)

Tumor size

0.346

 < 5 cm

739 (56.2%)

95 (60.1%)

 ≥ 5 cm

576 (43.8%)

63 (39.9%)

Operation time (min)

218.0 ± 78.7

219.7 ± 108.0

0.798

Blood loss (mL)

90.7 ± 130.4

96.5 ± 131.5

0.601

Hospital stay (day)

10.9 ± 8.2

12.3 ± 12.5

0.054

Retrieved lymph nodes

15.4 ± 7.6

15.4 ± 6.7

0.970

Overall complications

317 (24.1%)

49 (31.0%)

0.058

Major complications

37 (2.8%)

8 (5.1%)

0.137

30-day deaths

7 (0.5%)

0 (0.0%)

1.000