Table 4. Impact of observation time on adenoma detection according to logistic regression analysis.

		OR	95 % CI	P value
Proximal colon	Non-adjusted	3.643	2.370 – 5.599	< 0.001
	Adjusted *	3.610	2.283 – 5.709	< 0.001
Distal colon	Non-adjusted	1.818	1.145 – 2.888	0.011
	Adjusted *	2.341	1.395 – 3.929	0.001

OR, odds ratio; CI, confidence interval

^*Multivariate regression analysis considered the following factors as possible confounders: gender, age, body mass index, diabetes mellitus, alcohol abuse, nicotine abuse, Indication for colonoscopy, cecal intubation time.