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

Table 2 Polyp detection with cap-assisted colonoscopy vs standard colonoscopy on the all ages and both genders n (%)

Whole colon	Total (n = 1023)	CAC (n = 515)	SC (n = 508)	P value
Total polyps	967	549	418	0.008
Polyps per patient	0.95 ± 1.46	1.07 ± 1.59	0.82 ± 1.31	0.008
PDR	457 (44.7)	250 (48.5)	207 (40.7)	0.012
Right-side colon	Total (n = 1023)	CAC (n = 515)	SC (n = 508)	P value
Total polyps	547	339	208	< 0.001
Polyps per patient	0.53 ± 1.03	0.66 ± 1.18	0.41 ± 0.83	< 0.001
PDR	317 (31.0)	182 (35.3)	135 (26.6)	0.002
Polyps of segment	Total (n = 1023)	CAC (n = 515)	SC (n = 508)	P value
Cecum	85	42	43	0.888
Ascending colon	266	179	87	< 0.001
Hepatic flexure	80	56	24	0.001
Transverse colon	116	62	54	0.560
Splenic flexure	30	24	6	0.001
Descending colon	65	31	34	0.683
Sigmoid colon	223	105	118	0.406
Rectum	102	50	52	0.804

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