Comparison of Pentax HiLine and Olympus Lucera systems at screening colonoscopy

Table 1 Colonoscopy completion rates, patient demographics, sedation doses, procedure times and comfort scores in the Olympus Lucera and Pentax HiLine groups

Indicator	Olympus Lucera	Pentax HiLine	P value
	n (% of total)1
Complete colonoscopies	413/425 (97.2)	55/58 (94.9)	0.24
Male patients	239/413 (57.9)	35/55 (63.7)	0.5
	mean ± SD2
Patient age (yr)	66.3 ± 4.3	65.8 ± 4.7	0.36
Fentanyl dose (μg)	57.5 ± 18.0	61.4 ± 18.5	0.13
Midazolam dose (mg)	2.1 ± 0.6	2.4 ± 0.7	0.035
Comfort score	0.49 ± 0.6	0.95 ± 0.6	< 0.0001
Insertion time (min)	11.1 ± 6.6	11.6 ± 7.5	0.93
Normal colonoscopy withdrawal time (min)	15.6 ± 8.2	14.7 ± 8.0	0.20

Comparisons made using Fisher’s exact test¹ or Mann-Whitney U test².

Table 2 Polyp and adenoma detection rates in the Olympus Lucera and Pentax HiLine groups

	Olympus Lucera	Pentax HiLine	P value
With ≥ 1 polyp	239/413 (58%)	37/55 (67%)	0.19
With ≥ 1 adenoma	202/413 (49%)	31/55 (56%)	0.3

Comparisons made using Fisher’s exact test.

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.