Table 4. Factors affecting the withdrawal time in the phase 1 of the study: univariate model and multivariate logistic regression model for withdrawal time ≥ 6 minutes.

Binary outcome “withdrawal time ≥ 6 min” (yes vs. no)
	Univariate model Odds ratio (95 %CI)	P value	Multivariate model Odds ratio (95 %CI)	P value
Female sex	0.331 (0.221 – 0.495)	< 0.001	0.416 (0.270 – 0.643)	< 0.001
Age over 50 years	1.562 (0.964 – 2.532)	0. 071	0.970 (0.564 – 1.669)	0.913
Adequate bowel cleansing	2.009 (1.085 – 3.720)	0.024	2.162 (1.126 – 4.152)	0.021
Adenoma detection	3.693 (2.526 – 5.399)	< 0.001	2.466 (1.626 – 3.740)	< 0.001
Bleeding	0.561 (0.350 – 0.900)	0.017	0.612 (0.370 – 1.012)	0.056
CRC Screening	2.909 (1.989 – 4.252)	< 0.001	2.698 1.545 4.714	< 0.001
Adenoma surveillance	1.110 (0.723 – 1.704)	0.657	1.512 (0.823 – 2.779)	0.183
Gastrointestinal symptoms	0.361 (0.215 – 0.607)	< 0.001	0.815 (0.418 – 1.589)	0.548
Use of full-spectrum scopes	1.978 (1.362 – 2.873)	< 0.001	2.039 (1.361 – 3.053)	0.001

CRC, colorectal cancer.