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

Table 7 Polyp detection rate, adenoma detection rate, and the number of polyps and adenomas based on gender n (%)

Gender	Total	CAC	SC	P value
Whole colon
Male, n	549	280	269
Polyps per patient	1.25 ± 1.67	1.37 ± 1.84	1.12 ± 1.47	0.082
PDR	300 (54.6)	158 (56.4)	142 (52.8)	0.392
Adenomas per patient	0.81 ± 1.38	0.90 ± 1.53	0.71 ± 1.20	0.109
ADR	219 (39.9)	114 (40.7)	105 (39.0)	0.688
Female	474	235	239
Polyps per patient	0.60 ± 1.08	0.71 ± 1.14	0.49 ± 1.00	0.029
PDR	157 (33.1)	92 (39.1)	65 (27.2)	0.006
Adenomas per patient	0.38 ± 0.84	0.50 ± 0.98	0.26 ± 0.67	0.002
ADR	109 (23.0)	70 (29.8)	39 (16.3)	< 0.001
Right-side colon
Male	549	280	269
Polyps per patient	0.70 ± 1.20	0.87 ± 1.39	0.52 ± 0.94	0.001
PDR	205 (37.3)	118 (42.1)	87 (32.3)	0.018
Adenomas per patient	0.49 ± 1.00	0.60 ± 1.14	0.37 ± 0.82	0.007
ADR	153 (27.9)	90 (32.1)	63 (23.4)	0.023
Female	474	235	239
Polyps per patient	0.35 ± 0.73	0.41 ± 0.78	0.28 ± 0.67	0.066
PDR	112 (23.6)	64 (27.2)	48 (20.1)	0.067
Adenomas per patient	0.21 ± 0.56	0.29 ± 0.67	0.13 ± 0.42	0.002
ADR	72 (15.2)	49 (20.9)	23 (9.6)	0.001

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