Split-dose bowel preparation improves adequacy of bowel preparation and gastroenterologists’ adherence to National Colorectal Cancer Screening and Surveillance Guidelines

Table 4 Adjusted¹ odds ratios of guideline consistent recommendations in average-risk patients obtained from logistic regression models fit separately by each year

	2009 Before split-dosing			2011 After split-dosing
	OR	P value	95%CI	OR	P value	95%CI
Prep quality
Adequate or excellent	1.00
Good	0.55	0.001	(0.38, 0.78)	0.44	< 0.001	(0.32, 0.61)
Fair	0.04	< 0.001	(0.03, 0.06)	0.06	< 0.001	(0.04, 0.09)
Inadequate or Poor	0.17	< 0.001	(0.09, 0.30)	0.08	< 0.001	(0.05, 0.13)
Bowel prep type
MiraLAX/Gatorade	1.00			1.00
4L PEG, GoLYTELY, NuLYTELY, Colyte, TriLyte	0.65	0.013	(0.46, 0.91)	1.10	0.485	(0.84, 1.45)
Half-Lytely, Osmoprep, Moviprep, and others	0.62	0.032	(0.41, 0.96)	0.70	0.134	(0.44, 1.12)

¹Adjusted also for all variables listed under Table 3.