TABLE 3.

Randomized comparisons of various administration strategies of polyethylene glycol (PEG) bowel preparations for colonoscopy

Reference	n	Preparation	Efficacy	Tolerability and acceptability
Wang and Lin (33)	104	PEG Bisacodyl	PEG = bisacodyl	PEG = bisacodyl
Radaelli et al (34)	283	PEG Senna	Senna > PEG	Senna = PEG
Clarkston and Smith (35)	114	PEG PEG + bisacodyl	PEG + bisacodyl > PEG	PEG = PEG + bisacodyl
Ziegenhagen et al (36)	120	PEG PEG + senna	PEG + senna > PEG	PEG = PEG + senna
Sharma et al (37)	80	PEG + Mg-citrate PEG	PEG + Mg-citrate > PEG	PEG + Mg-citrate > PEG
Hookey et al (38)	171	PEG 4 L PEG 2 L + senna	PEG 4 L > PEG 2 L + senna	PEG 2 L + senna > PEG 4 L
Sharma et al (39)	150	PEG 4 L PEG 2 L + Mg-citrate PEG 2 L + bisacodyl	PEG 2 L + Mg-citrate, PEG 2 L + bisacodyl > PEG 4 L	PEG 2 L + Mg-citrate > PEG 2 L + bisacodyl ≥ PEG 4 L
Adams et al (40)	382	PEG 4 L PEG 2 L + bisacodyl	PEG 2 L + bisacodyl = PEG 4 L	PEG 2 L + bisacodyl = PEG 4 L
DiPalma et al (41)	200	PEG 4 L PEG 2 L + bisacodyl	PEG 2 L + bisacodyl = PEG 4 L	PEG 2 L + bisacodyl > PEG 4 L
Huppertz-Hauss et al (42)	231	PEG 4 L PEG 2 L + bisacodyl NaP	NaP = PEG 2 L + bisacodyl = PEG 4 L	NaP = PEG 2 L + bisacodyl = PEG 4 L
Hangartner et al (43)	300	PEG 4 L PEG 2 L + PSMC Senna + enema	PEG 4 L > senna + enema > PEG 2 L + PSMC	Senna + enema > PEG 4 L, PEG 2 L + PSMC
Borkje et al (44)	183	PEG 4 L PEG 1.5 L + PSMC	PEG 4 L = PEG 1.5 L + PSMC	PEG 4 L = PEG 1.5 L + PSMC
Aoun et al (45)	141	PEG 4 L + liquid diet PEG 2 L (×2) + regular diet	PEG 2 L (×2) + regular diet > PEG 4 L + liquid diet	PEG 2 L (×2) + regular diet = PEG 4 L + liquid diet
El Sayed et al (46)	187	PEG 3 L + liquid diet PEG 2 L + bisacodyl + regular diet + PEG 1 L	PEG 2 L + bisacodyl + regular diet + PEG 1 L > PEG 3 L + liquid diet	PEG 2 L + bisacodyl + regular diet + PEG 1 L > PEG 3 L + liquid diet

Mg-citrate Magnesium citrate; NaP Sodium phosphate; PSMC Sodium picosulphate plus Mg-citrate