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Table 2 Comparison of general data of patients in the two stages

From: The learning curve for laparoscopic pancreaticoduodenectomy by a proficient laparoscopic surgeon: a retrospective study at a single center

  

Learning improvement stage (n = 35)

Proficiency stage (n = 85)

P value

gender

   

0.446

 

male

22 (62.9%)

47 (55.3%)

 

female

13 (37.1%)

38 (44.7%)

 

Age (years)

 

58.1 ± 8.8

60.0 ± 8.9

0.245

Main admission symptom

   

0.352

 

jaundice

25 (71.4%)

54 (63.5%)

 

abdominal pain

2 (5.7%)

13 (15.3%)

 

others

8 (22.9%)

18 (21.7%)

 

hypertension

   

0.581

 

no

31 (88.6%)

72 (84.7%)

 

yes

4 (11.4%)

13 (15.3%)

 

Diabetes mellitus

   

0.788

 

no

33 (94.3%)

79 (92.9%)

 

yes

2 (5.7%)

6 (7.1%)

 

smoking history

   

0.308

 

no

26 (74.3%)

55 (64.7%)

 

yes

9 (25.7%)

30 (35.3%)

 

Drinking history

   

0.633

 

no

33 (94.1%)

62 (72.9%)

 

yes

8 (22.9%)

23 (27.1%)

 

History of pancreatitis

  

0.351

 

no

33 (94.3%)

83 (97.6%)

 

yes

2 (5.7%)

2 (2.4%)

 

History of cholangitis

    
 

no

34 (97.1%)

84 (98.8%)

0.517

yes

1 (2.9%)

1 (1.2%)

 

history of abdominal operation

  

0.704

 

no

30 (85.7%)

75 (88.2%)

 

yes

5 (14.3%)

10 (11.8%)

 

Main tumor size (cm)

2.4 ± 1.1

2.5 ± 0.9

0.351

American Society of Anesthesiologists (ASA) score

 

(0.599)

 

 ≤ 2

20 (57.1%)

53 (62.3%)

 

 > 2

15 (42.9%)

32 (37.7%)

 

pathological findings

   

0.377

 

cholangiocarcinoma

11 (31.4%)

29 (34.1%)

 

Periampullary carcinoma

7 (20.0%)

9 (10.6%)

 

pancreatic cancer

4 (11.4%)

21 (24.7%)

 

Carcinoma of duodenal papilla

11 (31.4%)

21 (24.7%)

 

Pancreatic neuroendocrine cancer

2 (5.7%)

5 (5.9%)

 

Body mass index()

 

18.5 ± 2.8

18.4 ± 2.7

0.909