Withdrawal time in excellent or very poor bowel preparation qualities

Table 5 Association between longer withdrawal time and higher polyp detection in various bowel preparation qualities

	No. of colonic segments with polyps		Total No. colonic polyps
	OR (95%CI)1	P-value	OR (95%CI)1	P-value
Excellent	1.07 (0.99-1.26)	NS	1.11 (0.99-1.24)	NS
Good	1.16 (1.13-1.19)	< 0.0001	1.15 (1.13-1.18)	< 0.0001
Fair	1.13 (1.10-1.17)	< 0.0001	1.13 (1.10-1.16)	< 0.0001
Poor	1.18 (1.11-1.26)	< 0.0001	1.20 (1.13-1.29)	< 0.0001
Unsatisfactory/very poor	1.02 (0.99-1.12)	NS	1.05 (0.99-1.10)	NS

¹Adjusted to age, gender, race, timing of colonoscopy, endoscopist adenoma detection rate, duration of colonoscopy practice of endoscopists, involvement of trainee during colonoscopy. NS: Not statistically significant.