Table 1 Patients’ characteristics.

From: Learning curve for robotic-assisted hiatal hernia repair determined by cumulative analysis of adjusted operative times

 

Total

N=101

Learning phase

N=52

Proficiency phase

N=49

p

Age, years (SD)

65.7 (14.3)

66.3 (13.6)

65.0 (15.2)

0.650

Sex, female (%)

69 (68.3)

36 (69.2)

33 (67.3)

0.840

Body mass index, kg/m2 (SD)

26.7 (4.3)

26.0 (4.2)

27.4 (4.3)

0.119

ASA score

    

2, n (%)

61 (60.4)

31 (59.6)

30 (61.2)

0.866

3, n (%)

37 (36.6)

19 (36.5)

18 (36.7)

4, n (%)

3 (3.0)

2 (3.8)

1 (2.0)

Comorbidities

    

Arterial hypertension, n (%)

45 (44.6)

20 (38.5)

25 (51.0)

0.938

Cardiac disease, n (%)

21 (20.8)

11 (21.2)

10 (20.4)

Pulmonary disease, n (%)

32 (31.7)

16 (30.8)

16 (32.7)

Previous tumor, n (%)

27 (26.7)

15 (28.8)

12 (24.5)

Renal disease, n (%)

14 (13.9)

6 (11.5)

8 (16.3)

Psychiatric disease, n (%)

26 (25.7)

13 (25.0)

13 (26.5)

Previous abdominal surgery, n (%)

45 (44.6)

21 (40.4)

24 (49.0)

Smoking status, n (%)

Active 3 (3.0)

Former 1 (1.0)

Active 2 (3.8)

Former 1 (1.9)

Active 1 (2.0)

Main symptoms

    

Reflux, n (%)

51 (50.5)

24 (46.2)

27 (55.1)

0.371

Dysphagia, n (%)

50 (49.5)

28 (53.8)

22 (44.9)

Hiatal hernia grade

    

1, n (%)

42 (41.6)

20 (40.4)

21 (42.9)

0.087

2, n (%)

3 (3.0)

2 (3.8)

1 (2.0)

3, n (%)

33 (32.7)

21 (40.4)

12 (24.5)

4, n (%)

6 (5.9)

4 (7.7)

2 (4.1)

Recurrent hernia, n (%)

17 (16.8)

4 (7.7)

13 (26.5)

  1. Dichotomous variables are expressed as number with percentage. Continuous variables are expressed as mean with standard deviation (SD).