Table 3 Factors affecting the cecal intubation failure before and after colonoscopic competency by logistic regression analysis

Age

  <60

22.0

1

5.7

1

  >60

29.8

1.210

0.872-1.678

0.253

9.0

1.310

0.773-2.219

0.316

Sex

  Male

22.4

1

6.2

1

  Female

29.6

1.325

0.953-1.842

0.095

8.8

1.668

0.973-2.859

0.063

BMI

18.5-24.99

25.8

1

6.6

1

  ≥25

21.3

0.783

0.545-1.124

0.185

5.9

1.008

0.565-1.798

0.978

  < 18.5

40.4

1.902

0.986-3.189

0.028

11.8

1.370

0.521-3.607

0.524

Bowel preparation

  Excellent/Good

23.5

1

6.5

1

  Fair/ Poor

39.7

2.037

1.312-3.162

0.002

12.0

2.370

1.240-4.529

0.008

Previous surgery

Stomach  No

24.6

1

6.6

1

        Yes

51.4

2.189

1.044-4.587

0.002

28.6

6.643

2.651-16.650

0.000

Gynecologic No

24.8

1

7.0

1

        Yes

36.8

1.609

0.838-3.088

0.153

9.4

0.931

0.272-3.183

0.909