Table 4. Odds ratios for cecal intubation in a logistic regression model adjusting for colonoscopy category, gender, Boston Bowel Preparation Score, indication for CS, endoscopist category.
| Unadjusted OR | Adjusted OR | ||||
| No. of CS | Mean (95 % CI) | P value | Mean (95 % CI) | P value | |
| CS category | |||||
| Clinical CS | 6917 [7092] |
1.0 (reference) | 1.0 (reference) | ||
| Work-up CS | 2604 [2630] |
2.0 (1.4 – 2.9) [2.2 (1.7 – 2.9)] |
< 0.001 [< 0.001] |
0.9 (0.5 – 1.7) [1.2 (0.7 – 2.0)] |
0.85 [0.51] |
| Screening CS | 746 [754] |
1.0 (0.62 – 1.52) [1.3 (0.9 – 1.9)] |
0.89 [0.18] |
0.8 (0.4 – 1.7) [0.8 (0.4 – 1.7)] |
0.60 [0.60] |
| Gender | |||||
| Men | 5222 [5324] |
1.0 (reference) | 1.0 (reference) | ||
| Women | 5045 [5152] |
0.5 (0.4 – 0.7) [0.6 (0.5 – 0.8)] |
< 0.001 [< 0.001] |
0.7 (0.5 – 1.0) [0.7 (0.5 – 0.9)] |
0.06 [0.01] |
| BBPS | 9196 [9272] |
1.9 (1.8 – 2.1) [2.1 (1.9 – 2.2)] |
< 0.001 [< 0.001] |
2.0 (1.8 – 2.1) [2.1 (1.9 – 2.3)] |
< 0.001 [< 0.001] |
| Indication for CS | |||||
| Symptoms | 4799 [4928] |
1.0 (reference) | 1.0 (reference) | ||
| Polyp surveillance | 1138 [1150] |
2.6 (1.5 – 4.5) [2.7 (1.8 – 4.2)] |
0.001 [< 0.001] |
2.8 (1.1 – 7.0) [2.9 (1.4 – 6.1)] |
0.03 [0.01] |
| IBD surveillance | 482 [492] |
1.1 (0.6 – 1.9) [1.1 (0.7 – 1.7)] |
0.77 [0.56] |
0.7 (0.3 – 1.4) [0.8 (0.4 – 1.6)] |
0.31 [0.56] |
| Unspecified | 498 [517] |
0.8 (0.5 – 1.3) [0.8 (0.5 – 1.1)] |
0.42 [0.12] |
1.5 (0.6 – 3.6) [1.8 (0.9 – 3.6)] |
0.35 [0.12] |
| Endoscopist group 1 | |||||
| Senior | 7141 [7295] |
1.0 (reference) | 1.0 (reference) | ||
| Junior | 3126 [3181] |
1.8 (1.3 – 2.4) [1.5 (1.2 – 1.8)] |
< 0.001 [0.001] |
2.0 (1.2 – 3.5) [2.3 (1.4 – 3.6)] |
0.01 [< 0.001] |
| Age (years) 2 | 10267 [10476] |
1.0 (1.0 – 1.0) [0.987 [0.980 – 0.995)] |
0.34 [0.001] |
– [0.997 (0.985 – 1.008)] |
[0.56] |
| Endoscopy center 2 | |||||
| Centre 1 | 1355 [1384] |
1.0 (reference) | – | ||
| Center 2 | 1880 [1909] |
0.9 (0.6 – 1.5) [1.1 (0.8 – 1.6)] |
0.80 [0.58] |
– | |
| Center 3 | 4381 [4493] |
1.0 (0.7 – 1.5) [0.9 (0.7 – 1.2)] |
0.90 [0.44] |
– | |
| Center 4 | 2651 [2690] |
0.9 (0.6 – 1.3) [1.1 (0.8 – 1.5)] |
0.51 [0.62] |
– | |
OR, odds ratio; CS, colonoscopy screening; BPPS, Boston Bowel Preparation Score; IBD, inflammatory bowel disease
1
End result of CIR after assistance when required (1.2 % of examinations by seniors and 15.5 % by juniors).
2
Patient age and endoscopy center did not reach statistical significance level in the univariate logistic regression and were not included in the adjusted model. Results including cases declared by the endoscopist to be impossible to intubate due to mechanical obstruction (stricture or fecal masses) are added in [brackets].