Comparison of 1L Adjuvant Auxiliary Preparations with 2L Solely Polyethylene Glycol plus Ascorbic Acid Regime for Bowel Cleaning: A Meta-analysis of Randomized, Controlled Trials

Table 2

Analysis of results of primary outcome and impact on the procedure in terms of efficacy of cleansing.

Efficacy	No. of studies		MD/RR	95% CI			value for heterogeneity
Adequate bowel preparation rate	4	845	1.00	0.95~1.05	0.87	47%	0.13
BBPS
Right colon	5	1013	-0.07	-0.15~0.01	0.13	16%	0.31
Transverse colon	5	1013	0.03	-0.04~0.10	0.39	0%	0.57
Left colon	5	1013	0.05	-0.14~0.24	0.62	86%	<0.001
Total	5	1013	0.01	-0.17~0.18	0.83	36%	0.18
Total examination time	4	826	-0.86	-1.88~0.15	0.14	27%	0.25
ADR	4	826	1.01	0.86~1.18	0.91	0%	0.60

indicates heterogeneity. ADR: adenoma detection rate; BBPS: Boston Bowel Preparation Scale; CI: confidence interval; MD: mean difference; for each MD/RR 95% Cl analysis; RR: relative risk.