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Table 1 Patient characteristics

From: Does the Endoscopic Surgical Skill Qualification System improve patients’ outcome following laparoscopic surgery for colon cancer? A multicentre, retrospective analysis with propensity score matching

 

Before PsM

After PsM

NQ group

Q group

p value

NQ group

Q group

p value

std

(N=352)

(N=65)

 

(N=49)

(N=49)

  

Age, years

70 (24–98)

73 (46–89)

0.008

72 (38–90)

73 (46–89)

0.929

0.070

Sex

  

0.422

  

0.686

 

 Male

181 (51.4%)

37 (56.9%)

 

24 (49.0%)

27 (55.1%)

 

− 0.123

 Female

171 (48.6%)

28 (43.1%)

 

25 (51.0%)

22 (44.9%)

 

0.123

BMI

22.5 (14.2-38.5)

23.4 (15.4-38.1)

0.035

22.7 (14.4–30.2)

23.3 (15.4–37.7)

0.481

− 0.143

ASA-PS

  

0.037

  

0.245

 

 Class 1, 2

304 (86.4%)

49 (75.4%)

 

39 (79.6%)

38 (77.6%)

 

0.050

 Class 3

48 (13.6%)

16 (24.6%)

 

10 (20.4%)

11 (22.4%)

 

− 0.050

Tumour location

  

0.495

  

0.834

 

 Right-sided

147 (41.8%)

24 (36.9%)

 

19 (38.8%)

17 (34.7%)

 

0.085

 Left-sided

205 (58.2%)

41 (63.1%)

 

30 (61.2%)

32 (65.3%)

 

− 0.085

Preoperative ileus

  

0.349

  

1

 

 Yes

57 (16.2%)

7 (10.8%)

 

6 (12.2%)

7 (14.3%)

 

− 0.060

 No

295 (83.8%)

58 (89.2%)

 

43 (87.8%)

42 (85.7%)

 

0.060

Previous laparotomy

  

0.259

  

1

 

 Yes

75 (21.3%)

18 (27.7%)

 

12 (24.5%)

12 (24.5%)

 

0

 No

277 (78.7%)

47 (72.3%)

 

37 (75.5%)

37 (75.5%)

 

0

Adj chemo

  

0.891

  

1

 

 Yes

146 (41.5%)

26 (40.0%)

 

20 (40.8%)

21 (42.9%)

 

− 0.041

 No

206 (58.5%)

39 (60.0%)

 

29 (59.2%)

28 (57.1%)

 

0.041

CEA, ng/ml

3.2 (0.3–79.1)

3.0 (0.6–44.0)

0.499

2.7 (0.5–43.9)

3.1 (0.6–44.0)

0.529

− 0.015

CA19-9, ng/ml

7.0 (1.0–644.5)

11.9 (1.0–1933.0)

0.056

8.2 (1.0–644.5)

11.9 (1.00–184.0)

0.189

− 0.137

pStage

  

1

  

0.840

 

 pStage II

163 (46.3%)

30 (46.2%)

 

23 (46.9%)

25 (51.0%)

 

− 0.082

 pStage III

189 (53.7%)

35 (53.8%)

 

26 (53.1%)

24 (49.0%)

 

0.082

Histological type

  

0.052

  

0.715

 

 Differentiated

333 (94.6%)

57 (87.7%)

 

46 (93.9%)

44 (89.8%)

 

0.149

 Undifferentiated

19 (5.4%)

8 (12.3%)

 

3 (6.1%)

5 (10.2%)

 

− 0.149

Tumour diameter, mm

40.0 (2.0–117.0)

45.0 (10.0–110.0)

0.131

40.0 (12.0–117.0)

45.0 (10.0–90.0)

0.270

− 0.144

Lymphatic invasion

  

0.282

  

0.840

 

 Positive

179 (50.9%)

38 (58.5%)

 

24 (49.0%)

26 (53.1%)

 

− 0.082

 Negative

173 (49.1%)

27 (41.5%)

 

25 (51.0%)

23 (46.9%)

 

0.082

Vascular invasion

  

0.132

  

0.684

 

 Positive

211 (59.9%)

32 (49.2%)

 

29 (59.2%)

26 (53.1%)

 

0.124

 Negative

141 (40.1%)

33 (50.8%)

 

20 (40.8%)

23 (46.9%)

 

− 0.124

  1. Continuous variables are presented as medians with ranges; discrete variables are presented as numbers with percentages
  2. NQ group non-qualified surgeon group, Q group qualified surgeon group, PsM propensity score matching, BMI body mass index, ASA-PS American Society of Anesthesiologists performance status, Adj chemo adjuvant chemotherapy, std standardised difference