Table 3

Odds ratios and 95% CI for difficult procedures.

Odds ratio

95% Confidence Interval

P value


Females

2.312

1.528-3.498

<0.0001


ASA=1

1

ASA=2

0.539

0.344-0.844

0.0070

ASA=3,4

1.043

0.531-2.050

0.9023


Highly-experienced specialist

1


Less experienced

1.925

1.046-3.541

0.0352


More experienced non-specialist

1.028

0.620-1.705

0.9151


Adequate bowel preparation

1


Presence of residual matter

1.465

0.917-2.339

0.1099


Inadequate bowel preparation

3.208

1.511-6.808

0.0024


Duration of procedure ≥17.5

1.633

1.050-2.538

0.0294


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

Open Data