Split-dose menthol-enhanced PEG vs PEG-ascorbic acid for colonoscopy preparation

Table 1 Patient characteristics

	PEG + M	AscPEG	P value
Age (mean ± SD, yr)	55 ± 13.8	54 ± 13.7	0.88
Male subjects	54%	50%	0.74
BMI (mean ± SD, kg/m2)	27 ± 4.7	27 ± 4.9	0.54
Indication
Screening	46%	43%	0.70
Hematochezia	13%	13%	0.95
Abdominal pain	14%	12%	0.75
Change in bowel habits	10%	6%	0.41
Surveillance	7%	9%	0.53
Positive FOBT	4%	5%	0.74
Weight loss	2%	1%	0.27
Anemia	2%	5%	0.31
Diverticular disease	0%	2%	0.20
Others	2%	4%	0.28

PEG + M: PEG electrolyte solution + menthol; AscPEG: Ascorbic acid PEG electrolyte solution.

Table 2 Percentage adequate preparation by colonic segment using the Ottawa scale

	PEG + M	AscPEG	P value
Right	84%	79%	0.340
Mid	95%	89%	0.110
Left	94%	81%	0.0051
Overall	85%	74%	0.054

¹Significant P-value. PEG + M: PEG electrolyte solution + menthol; AscPEG: Ascorbic acid PEG electrolyte solution.