Table 3.

Reports of adenoma detection in an observational study and a retrospective review of the water method

Reference	Indications	Design/Sedation	Adenoma Detection Rate (ADR)
Leung et al7	Diagnostic, screening and surveillance	OS/None	Air 16/62 (25.8%) vs water 23/63 (36.5%) (p=0.2474)
		n=125
Leung et al8	Screening or surveillance	Review/Yes	Air 184/683 (26.9%) vs water 173/495 (34.9%) (p=0.0031)
		n=1178
		Combined	Air 200/745 (26.8%) vs water 196/558 (35.1%) (p=0.0015)
		Summary comment	The water method appeared to increase ADR significantly.

OS, observational study; n, number of patients in the study; ADR, adenoma detection rate.