Efficacy of 0.5-L vs 1-L polyethylene glycol containing ascorbic acid as additional colon cleansing methods for inadequate bowel preparation as expected by last stool examination before colonoscopy

Table 4 Comparison of bowel preparation quality between study groups

		0.5-L Group (n = 47)	1-L Group (n = 43)	Total (n = 90)	P value
ABPS					0.617
	Excellent	7 (14.9)	7 (16.3)	14 (15.6)
	Good	31 (66.0)	31 (72.1)	62 (68.9)
	Fair	9 (19.1)	5 (11.6)	14 (15.6)
BBPS
	Mean	6.7 ± 1.5	7.0 ± 1.7	6.8 ± 1.6	0.342
	BBPS ≥ 8	13 (27.7)	16 (37.2)	29 (32.2)	0.458

Values are presented as the mean ± SD or n (%). ABPS: Aronchick bowel preparation scale; BBPS: Boston bowel preparation scale; 0.5-L Group: Additional 0.5-L polyethylene glycol (PEG) containing ascorbic acid (PEG + Asc) regimen; 1-L Group: Additional 1-L PEG + Asc regimen.