Table 2 Clinicopathological characteristics and short-term outcomes in CRLM patients receiving simultaneous resection after PSM

Age ≥60 years, n (%)

65 (47.4%)

67 (48.9%)

0.809

132(48.2%)

Male, n (%)

81 (59.1%)

86 (62.8%)

0.536

167(60.9%)

BMI ≥ 24 kg/m², n (%)

65 (47.4%)

64 (46.7%)

0.904

129(47.1%)

NLR ≥ 1.86, n (%)

82 (59.9%)

85 (62.0%)

0.710

167(60.9%)

Comorbidity, n (%)

58 (42.3%)

54 (39.4%)

0.623

112(40.9%)

ASA score 3–4, n (%)

18 (13.1%)

20 (14.6%)

0.727

38(13.9%)

Preoperative CEA ≥ 200 ng/ml, n (%)

6 ( 4.4%)

8 ( 5.8%)

0.583

14(5.1%)

Primary site in colon, n (%)

71 (51.8%)

73 (53.3%)

0.809

144(52.6%)

Right hemicolon, n (%)

26 (19.0%)

29 (21.2%)

0.651

55(20.1%)

Diameter of liver metastases ≥ 5 cm, n (%)

22 (16.1%)

25 (18.2%)

0.631

47(17.2%)

Multiple liver metastases, n (%)

82 (59.9%)

81 (59.1%)

0.902

163(59.5%)

Bilobar liver distribution, n (%)

57 (41.6%)

57 (41.6%)

1

114(41.6%)

Poor differentiation, n (%)

43 (31.4%)

43 (31.4%)

1

86(31.4%)

T3-T4 stage, n (%)

126 (92.0%)

126 (92.0%)

1

252(92.0%)

Positive lymph node metastasis, n (%)

98 (71.5%)

100 (73.0%)

0.787

198(72.3%)

Extrahepatic metastases, n (%)

9 ( 6.6%)

11 ( 8.0%)

0.642

20(7.3%)

Concomitant RFA, n (%)

15 (10.9%)

14 (10.2%)

0.844

29(10.6%)

R0 resection, n (%)

103 (75.2%)

102 (74.5%)

0.889

205(74.8%)

Major liver resection, n (%)

63 (46.0%)

67 (48.9%)

0.628

130(47.4%)

Pretreatment chemotherapy, n (%)

84 (61.3%)

78 (56.9%)

0.461

162(59.1%)

Hepatic portal occlusion, n (%)

105 (76.6%)

100 (73.0%)

0.486

205(74.8%)

All laparoscopic operation, n (%)

34 (24.8%)

32 (23.4%)

0.778

66(24.1%)

Operation time, min (median, IQR)

360.0(292.5-434.5)

320.0(272.5–421.0)

0.088

345.0(280.0-431.5)

Blood loss, ml (median, IQR)

200.0(150.0-450.0)

200.0(100.0-400.0)

0.831

200.0(100.0-400.0)

Blood transfusion, n (%%)

35(25.5%)

31(22.6%)

0.572

66(24.1%)

Complications, n (%)

0, n (%)

73(53.5%)

68(49.6%)

0.814

141(51.5%)

1–2, n (%)

35(25.5%)

39(28.5%)

74(27.0%)

3–5, n (%)

29(21.2%)

30(21.9%)

59(21.5%)

Postoperative minor complications, n (%)

35(25.5%)

39(28.5%)

0.586

74(27.0%)

Postoperative major complications, n (%)

29(21.2%)

30(21.9%)

0.883

59(21.5%)

ICU, n (%)

16(11.7%)

8(5.8%)

0.087

24(8.8%)

Post-operative hospital stay, days (median, IQR)

10.0(9.0–13.0)

10.0(8.0–14.0)

0.913

10.0(9.0–14.0)