Table 2

Distribution of the main characteristics by procedure (difficult vs routine).

Difficult procedure (n=142)

Routine procedure (n=475)

P value


Gender (females)

66.2%

47.4%

<0.0001


Mean age±SD

58.8±14.6

61.8±12.6

0.03


Endoscopists

0.014


less experienced

26.8%

15.8%

more experienced non-specialists

52.1%

61.7%

highly experienced specialists

21.1%

22.5%


Current diseases


Allergy

20.4

22.1

0.72

Heart

16.9

15.2

0.60

Liver

7.7

5.3

0.30

Kidney

2.8

4.6

0.47

Thyroid

5.6

5.7

1.00

Polypectomy

14.8

16.0

0.79


Duration of colonoscopy (minutes)


mean±SD

26.9±14.2

22.0±10.2

0.0002

range

5-85

2-65


Bowel preparation


adequate

62.7%

77.3%

<0.0001

with residual matter

26.1%

18.7%

inadequate

11.2%

4.0%


ASA score

0.003


1

46.5%

33.7%

2

38.7%

54.9%

3+4

14.8%

11.4%


Cardin et al. BMC Surgery 2012 12(Suppl 1):S9   doi:10.1186/1471-2482-12-S1-S9

Open Data