Skip to main content

Table 2 Comparison of intraoperative factors and postoperative short-term and long-term results before PS matching

From: Liver resection for colorectal liver-limited metastases in elderly patients: a propensity score matching analysis

Variable

Aged < 70 years (n = 651)

Aged ≥ 70 years (n = 73)

P value

Standardized mean difference

Combined with RFA

85 (13.1%)

3 (4.1%)

0.027

0.486

Two-stage hepatectomy

9 (1.4%)

1 (1.4%)

1.000

 

Simultaneous resection

120 (18.4%)

17 (23.3%)

0.315

 

Major hepatectomy

127 (19.5%)

9 (12.3%)

1.136

0.127

Pringle clamp

513 (78.8%)

53 (72.6%)

0.224

 

Pringle clamp time (min)

20 (0–98)

15 (0–60)

0.061

 

R1 margin

96 (14.7%)

7 (9.6%)

0.232

 

Intraoperative blood loss (ml)

200 (0–6500)

150 (20–1000)

0.529

 

Intraoperative RBC transfusion

28 (4.3%)

5 (6.8%)

0.367

 

Intraoperative RBC transfused (U)

4 (1–12)

3 (2–4)

0.269

 

Operation time (min)

187 (32–600)

180 (60–330)

0.146

 

Hospital stay (days)

9 (4–78)

9 (4–48)

0.909

 

Postoperative complications

186 (28.6%)

20 (27.4%)

0.833

 

Clavien-Dindo classification

  

0.262

 

 I–II

106 (57.0%)

14 (70.0%)

  

 III–V

80 (43.0%)

6 (30.0%)

  

General complications

58 (8.9%)

4 (5.5%)

0.321

 

 Postoperative heart failure

2 (0.3%)

0 (0%)

1.000

 

 Postoperative coronary artery disease

6 (0.9%)

0 (0%)

1.000

 

 Postoperative arrhythmia

8 (1.2%)

1 (1.4%)

1.000

 

 Postoperative lung infection

5 (0.8%)

1 (1.4%)

0.473

 

 Postoperative renal failure

2 (0.3%)

0 (0%)

1.000

 

 Postoperative pulmonary embolism

1 (0.2%)

0 (0%)

1.000

 

 Postoperative deep vein thrombosis

2 (0.3%)

0 (0%)

1.000

 

 Postoperative urinary infection

4 (0.6%)

0 (0%)

1.000

 

 Postoperative pleural effusion

28 (4.3%)

2 (2.7%)

0.759

 

 Postoperative stress ulcer

6 (0.9%)

1 (1.4%)

0.526

 

Surgical complications

129 (19.8%)

11 (15.1%)

0.330

 

 Posthepatectomy liver failure

22 (3.4%)

2 (2.7%)

1.000

 

 Postoperative abdominal infection

53 (8.1%)

7 (9.6%)

0.671

 

 Postoperative bile leakage

37 (5.7%)

3 (4.1%)

0.788

 

 Postoperative abdominal collection

22 (3.4%)

2 (2.7%)

1.000

 

 Incision infection

9 (1.4%)

0 (0%)

0.610

 

 Postoperative ileus

12 (1.8%)

0 (0%)

0.622

 

 Postoperative abdominal bleeding

26 (4.0%)

1 (1.4%)

0.508

 

ICU

18 (2.8%)

8 (11.0%)

0.003

 

ICU stay (days)

1 (1–6)

1.5 (1–6)

0.927

 

Postoperative RBC transfusion

50 (7.7%)

7 (9.6%)

0.566

 

Postoperative RBC transfused (U)

4 (2–58)

2 (2–6)

0.510

 

Reoperation

12 (1.8%)

0 (0%)

0.622

 

Readmission

3 (0.5%)

3 (4.1%)

0.016

 

Mortality (in-hospital)

1 (0.2%)

0 (0%)

1.000

 

Mortality (90-day)

1 (0.2%)

0 (0%)

1.000

 

Recurrence

467 (71.7%)

49 (67.1%)

0.409

 

 Intrahepatic recurrence

355 (54.5%)

40 (54.8%)

0.966

 

 Extrahepatic recurrence

112 (17.2%)

9 (12.3%)

0.290

 

Disease-free survival

  

0.374

 

 1-year

46.6%

50.5%

  

 3-year

26.2%

31.0%

  

 5-year

23.5%

25.5%

  

Overall survival

  

0.219

 

 1-year

94.1%

90.4%

  

 3-year

60.5%

56.3%

  

 5-year

48.7%

43.6%

  

Cancer-specific survival

  

0.512

 

 1-year

94.4%

90.4%

  

 3-year

61.1%

59.0%

  

 5-year

49.2%

45.7%