Table 4. Risk Factors of Poor Bowel Preparation by Multivariate Analysis.

Risk factor	Adjusted OR	95% CI	P-value
Age	1.02	1.003–1.042	0.026
Cerebrovascular disease	6.53	1.542–27.635	0.011
History of gastrectomy	3.21	1.616–6.369	0.001
History of appendectomy	2.93	1.412–6.093	0.004
Low solution uptake ≤2 L	3.60	1.598–8.114	0.002