Table 6.

Logistic regression analyses regarding the effect of shorter S-C, shorter run-way time, and colonoscopy in the morning on bowel preparation quality in the validation cohort.

Outcomes	OR	95% CI	P value
Effect of shorter S-C on adequate bowel preparation
Univariate logistic regression	2.556	(1.228, 5.320)	0.012
Multivariate logistic regression	2.973	(1.399, 6.319)	<0.001
Effect of shorter S-C on excellent bowel preparation
Univariate logistic regression	2.439	(1.647, 3.610)	<0.001
Multivariate logistic regression	2.558	(1.715, 3.817)	<0.001
Effect of shorter run-way time on adequate bowel preparation
Univariate logistic regression	2.951	(1.390, 6.264)	0.005
Multivariate logistic regression	3.344	(1.546, 7.233)	0.002
Effect of shorter run-way time on excellent bowel preparation
Univariate logistic regression	3.112	(2.090, 4.635)	<0.001
Multivariate logistic regression	3.229	(2.152, 4.845)	<0.001
Effect of colonoscopy in the morning on adequate bowel preparation
Univariate logistic regression	3.115	(1.571, 6.176)	0.001
Multivariate logistic regression	3.874	(1.870, 8.029)	<0.001
Effect of colonoscopy in the morning on excellent bowel preparation
Univariate logistic regression	2.799	(1.798, 4.358)	<0.001
Multivariate logistic regression	3.025	(1.916, 4.775)	<0.001

S-C – time interval between oral simethicone and the start of colonoscopy; OR – odd ratio; CI – confidence interval; BBPS – Boston Bowel Preparation Scale. Multivariate logistic regression analyses were performed by adjusting for age, gender, BMI, and abnormal defecation for exploring the effect of shorter S-C, shorter run-way time, and colonoscopy in the morning on bowel preparation quality, respectively.