Predictors of suboptimal bowel preparation in asymptomatic patients undergoing average-risk screening colonoscopy

Table 3 Multivariable estimates [odds ratio (95%CI)] of predictors of suboptimal bowel preparation

Factor	Suboptimal prep, OR (95%CI)
Endoscopy site
Academic in-Hospital Unit	1.1 (0.76-1.6)
Veterans Affairs Hospital	2.2 (1.1-4.3)
African-American	1.5 (1.0-2.2)
Diabetic	2.3 (1.6-3.2)
TCA use	2.5 (1.3-4.9)
Narcotics use	1.7 (1.2-2.5)
Bowel prep type
8L PEG-3350	0.46 (0.24-0.87)
MiraLAX®/Gatorade®	0.61 (0.43-0.86)

TCA: Tricyclic antidepressants; OR: Odds ratio; PEG: Polyethylene glycol.