Is a split-dose regimen of 2 L polyethylene glycol plus ascorbic acid tolerable for colonoscopy in an early morning visit to a comprehensive medical check-up?

Table 7 Correlation of bowel cleanliness and interval between finishing bowel preparation and colonoscopy

Bowel preparation score	Inadequate	Poor	Fair	Good	Excellent	P value
	n = 4	n = 25	n = 138	n = 165	n = 40
Interval1	661.3 ± 91.3	667.3 ± 205.6	631.0 ± 201.3	413.7 ± 210.2	364.5 ± 167.8	< 0.001
T2	a	a	a	b	b	TukeyB

¹Interval between finish of bowel preparation and start of colonoscopy (min). Statistical significances were tested by One-way analysis of variances among groups;

²The same letters indicate non-significant difference between groups based on Tukey’s multiple comparison test.