Efficacy of cap-assisted colonoscopy according to lesion location and endoscopist training level

Table 5 Polyp detection rate, adenoma detection rate, and the number of polyps and adenomas of whole colon based on age n (%)

Whole colon
Age (yr)	Total	CAC	SC	P value
20-49	308	147	161
Polyps per patient	0.51 ± 1.07	0.63 ± 1.32	0.41 ± 0.77	0.078
PDR	94 (30.5)	51 (34.7)	43 (26.7)	0.128
Adenomas per patient	0.26 ± 0.77	0.37 ± 1.02	0.16 ± 0.41	0.013
ADR,	57 (18.5)	35 (23.8)	22 (13.7)	0.022
50-65	544	293	251
Polyps per patient	1.01 ± 1.47	1.09 ± 1.57	0.92 ± 1.34	0.194
PDR	260 (47.8)	146 (49.8)	114 (45.4)	0.305
Adenomas per patient	0.67 ± 1.22	0.76 ± 1.34	0.57 ± 1.04	0.068
ADR	190 (34.9)	107 (36.5)	83 (33.1)	0.400
66-75	154	68	86
Polyps per patient	1.55 ± 1.84	1.93 ± 1.91	1.26 ± 1.74	0.024
PDR	91 (59.1)	47 (69.1)	44 (51.2)	0.024
Adenomas per patient	1.04 ± 1.53	1.28 ± 1.62	0.85 ± 1.43	0.084
ADR	71 (46.1)	38 (55.9)	33 (38.4)	0.030
≥ 76	17	7	10
Polyps per patient	1.24 ± 1.20	1.14 ± 0.90	1.30 ± 1.41	0.959
PDR	12 (70.6)	6 (85.7)	6 (60.0)	0.338
Adenomas per patient	1.00 ± 1.11	0.71 ± 0.75	1.20 ± 1.31	0.502
ADR	10 (58.8)	4 (57.1)	6 (60.0)	1.000

CAC: Cap-assisted colonoscopy; SC: Standard colonoscopy; PDR: Polyp detection rate; ADR: Adenoma detection rate.