Table 1.

Mean polyp detection rate, adenoma detection rate, colonoscopy withdrawal time and gender distribution of the three study phases

	Phase 1 (n=100) (%)	Phase 2 (n=102) (%)	OR	95% CI	p Value	Phase 3 (n=105) (%)	OR	95% CI	p Value
Female sex (%)	60	43	0.50	0.29 to 0.88	<0.02	38	0.41	0.23 to 0.72	<0.01
PDR (%)	22	43	2.67	1.44 to 4.96	<0.01	50	3.55	1.92 to 6.55	<0.01
ADR (%)	14	33	3.03	1.50 to 6.11	<0.01	37	3.61	1.80 to 7.23	<0.01
Mean WT (min)	6.8	7.2			0.73	10.9			<0.01
WT ≥6 min	53	71	2.17	1.21 to 3.89	<0.01	87	5.93	2.94–11.98	<0.01
WT ≥8 min	34	44	1.53	0.86 to 2.70	0.15	74	5.52	3.00 to 10.16	<0.01

p Values are comparison with the preintervention phase 1.

ADR, adenoma detection rate; PDR, polyp detection rate; WT, withdrawal time.