Table 3.

Adenoma detection rate (ADR), advanced neoplasia (AN) and anatomical distribution (proximal = proximal to splenic flexure; distal = splenic flexure and below)

	Air Method (n=191)	Water Method (n=177)	p*
Screening	100%	100%
Total number polyps	364	375
Polyps/patient	1.9±0.2	2.1±0.2	n.s.
Total number adenomas	213	211
Adenomas/patient	1.1±0.1	1.2±0.1
Number of proximal adenomas	134 (62.9%)	142 (67.3%)	n.s.
Number of distal adenomas	79 (37.1%)	69(32.7 %)	n.s.
Patients with AN, n (%)	39 (20%)	27 (15.3%)	n.s.
Patients with ≥ 3 adenomas (without AN features)	7 (3.6%)	10 (5.6%)	n.s.
Patients with cancer	4 (1 Proximal)	1 (Proximal)
Adenoma detection rate; n (%)	88 (46.1%)	101 (57.1%)	0.04
At least one proximal adenoma; n (%)	66 (34.6%)	81 (45.8%)	0.03
<10 mm	60 (31.4%)	74 (41.8%)	0.04
≥10 mm	19 (9.9%)	15 (8.5%)	n.s.
At least 1 distal adenoma; n (%)	54 (28.3%)	52 (29.4%)	n.s.
<10 mm	35 (18.3%)	41 (23.2%)	n.s.
≥10 mm	31 (16.2%)	18 (10.2%)	n.s.

AN, advanced neoplasm. Data are mean ± SEM and frequency count (%).

^*Student's t test or Fisher's exact test.