Table 3.

Distribution by size and shape of all polyps detected in the patients who received bowel preparation the same day and the day before

Lesion	Preparation same day (group 1, 2)	Preparation day before (group 3, 4)	P
Polyp size (mean ± SD)	5.6 ± 3.8	5.3 ± 5.1	NS
Polyp size ≤ 5 mm (n = 121)	59	62	NS
Flat lesions (n = 37)	28	9	< 0.01
Flat lesions size (mean ± SD)	4.8 ± 3.7	9.0 ± 12.0	NS
Protruding polyps (n = 146)	69	77	NS
Protruding polyps size (mean ± SD)	5.9 ± 3.8	4.9 ± 3.6	NS
Total polyps (flat + protruding) (n = 183)	97	86	NS

Bonferroni's correction.