Comparison of Pentax HiLine and Olympus Lucera systems at screening colonoscopy

Table 3 Polyps and adenomas of various characteristics in the Olympus Lucera and Pentax HiLine groups (mean ± SD)

Size location	Olympus Lucera		Pentax HiLine		P value
	n	mean ± SD	n	mean ± SD
Polyps
All	586	1.42 ± 1.96	87	1.58 ± 1.73	0.19
> 1 cm	109	0.26 ± 0.53	16	0.29 ± 0.50	0.51
≤ 1 cm	477	1.15 ± 1.78	70	1.27 ± 1.58	0.27
≤ 0.5 cm	368	0.89 ± 1.53	54	0.98 ± 1.27	0.22
Adenomas
All	414	1.00 ± 1.54	59	1.07 ± 1.27	0.27
Proximal	164	0.4 ± 0.9	21	0.38 ± 0.7	0.74
> 1 cm	97	0.23 ± 0.50	14	0.25 ± 0.48	0.6
≤ 1 cm	317	0.77 ± 1.38	45	0.82 ± 1.11	0.29
≤ 0.5 cm	229	0.55 ± 1.13	31	0.56 ± 0.96	0.63
Advanced adenomas
All	145	0.35 ± 0.7	16	0.29 ± 0.5	0.64

Comparisons made using Mann-Whitney U test.