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 3 Baseline characteristics of the patients

		0.5-L Group (n = 47)	1-L Group (n = 43)	Total (n = 90)	P value
Age, years
	mean ± SD	49.7 ± 11.2	46.2 ± 10.8	48.0 ± 11.1	0.126
	Median (range)	51 (29-72)	48 (22-64)	49 (22-72)
Sex (male)		29 (61.7)	32 (74.4)	61 (67.8)	0.287
BMI (kg/m2)		24.2 ± 3.1	25.0 ± 3.4	24.6 ± 3.4	0.150
Comorbidity
	Diabetes	7 (14.9)	4 (9.3)	11 (12.2)	0.626
	Hypertension	6 (12.8)	6 (14.0)	12 (13.3)	1.000
	Abdominal surgery	10 (21.3)	9 (20.9)	19 (21.1)	1.000
Dietary compliance		23 (48.9)	18 (41.8)	41 (45.5)	0.369
Characteristic of last rectal effluent					0.412
	Turbid liquid	34 (72.3)	27 (62.8)	61 (67.8)
	Particulate liquid	13 (27.7)	15 (34.9)	28 (31.1)
	Liquid with small amounts of feces	0 (0)	1 (2.3)	1 (1.1)
Number of defecations		3.0 ± 0.8	3.9 ± 1.3	3.5 ± 1.2	0.000
Interval between preparation and colonoscopy		86.3 ± 32.9	78.6 ± 27.1	82.6 ± 30.3	0.232

Values are presented as the mean ± SD or n (%). BMI: Body mass index; 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.