Interendoscopist variability in proximal colon polyp detection is twice higher for serrated polyps than adenomas

Table 3 Comparison of polyp detection rates (%) according to age groups amongst the 18 colonoscopists using the Wilcoxon test

		< 55	55-59	60-64	65-69	≥ 70	Total	P value
A.DR	n	18	18	18	18	18	18
	mean	29.5	28.6	36.7	42.3	42.2	35.7
	Median	28.5	29.6	38.8	43.5	43.0	34.1	< 0.0001
	Q1-Q3	24.4-34.8	21.4-33.3	29.4-41.4	28.6-50.0	37.5-45.5	31.7-38.8
	Min-Max	16.7-42.9	12.5-42.6	18.4-52.9	21.7-73.0	29.0-53.8	24.6-47.6
DA.DR	n	18	18	18	18	18	18
	mean	23.9	23.6	31.9	35.3	33.4	29.4
	Median	22.7	23.8	33.0	39.0	33.3	29.4	0.0003
	Q1-Q3	17.6-31.8	18.5-27.8	29.4-37.5	22.7-44.4	26.5-37.5	25.6-31.8
	Min-Max	11.1-35.3	12.5-36.8	14.3-42.9	13.6-54.1	23.1-51.6	19.0-39.0
PA.DR	n	18	18	18	18	18	18
	mean	9.1	8.8	11.7	15.9	17.4	12.4
	Median	8.3	9.5	9.1	17.5	15.9	11.5	0.0006
	Q1-Q3	5.9-9.3	4.3-11.8	5.0-18.2	11.9-20.0	12.5-20.6	7.3-17.8
	Min-Max	0-25.0	0-17.9	0-31.0	2.5-32.4	0-46.2	5.9-22.9
PSP.DR	n	18	18	18	18	18	18
	mean	6.1	6.5	6.2	8.1	8.6	6.9
	Median	5.0	4.7	1.8	5.8	8.0	5.4	0.37
	Q1-Q3	0.0-7.4	3.2-10.0	0.0-10.0	2.5-10.2	3.2-12.9	3.1-8.5
	Min-Max	0.0-20.9	0.0-21.4	0.0-23.1	0.0-26.5	0.0-20.6	1.3-19.2

A.DR: Adenoma detection rate; DA.DR: Distal adenoma detection rate; PA.DR: Proximal adenoma detection rate; PSP.DR: Proximal serrated polyp detection rate.