Impact of looping on premalignant polyp detection during colonoscopy

Table 4 Multivariate analysis of the effect on polyp detections in the sub-analysis of experienced endoscopists

	Odds ratio	95% confidence interval	DOF	P value
Adenoma
Looping1	1.14	1.07-1.23	1	< 0.001
Age	1.05	1.05-1.05	1	< 0.001
Male sex	1.42	1.29-1.56	1	< 0.001
Insertion time	0.93	0.91-0.95	1	< 0.001
Withdrawal time	1.13	1.11-1.14	1	< 0.001
High-risk adenoma
Looping1	1.27	1.14-1.41	1	< 0.001
Age	1.05	1.05-1.06	1	< 0.001
Male sex	1.56	1.35-1.81	1	< 0.001
Insertion time	0.89	0.85-0.92	1	< 0.001
Withdrawal time	1.18	1.16-1.20	1	< 0.001
Clinically significant serrated polyp
Looping1	1.15	1.04-1.28	1	0.008
Age	1.00	1.00-1.01	1	0.627
Male sex	0.66	0.57-0.77	1	< 0.001
Insertion time	0.92	0.89-0.96	1	< 0.001
Withdrawal time	1.13	1.11-1.15	1	< 0.001

¹No, mild, and severe looping were scored 0, 1, and 2, respectively.

P value was calculated using binomial logistic regression model. DOF: Degree of freedom.