Transparent-cap-fitted colonoscopy shows higher performance with cecal intubation time in difficult cases

Table 1 Baseline characteristics n (%)

	CFC(n = 150)	NCF(n = 145)	P value
Gender
Male	94 (62.7)	87 (62.6)	1.000
Female	56 (37.3)	58 (37.4)
Age (yr) mean ± SD	65.4 ± 15.3	66.1 ± 14.8	0.736
Body mass index (kg/m2), mean ± SD	26.2 ± 10.6	27.4 ± 9.6	0.489
History of abdominal surgery	43 (28.6)	32 (22.1)	0.181
Cesarean section	20 (13.3)	15 (10.3)	0.474
Appendectomy	16 (10.6)	10 (6.9)	0.306
Distal gastrectomy due to peptic ulcer	7 (4.7)	7 (4.8)	1.000
Diverticulosis	51 (34.0)	42 (30.0)	0.382
Preparation score 2 or 3	30 (20.0)	31 (21.3)	0.776

CFC: Cap-fitted colonoscopy; NCF: Non-cap-fitted colonoscopy.

Table 2 Comparison of two groups with regard to cecal intubation time and number of detected colonic adenomas (mean ± SD)

	CFC(n = 150)	NCF(n = 145)	P value
Cecal intubation time (s)	262 ± 154	281 ± 138	0.057
Number of detected adenomas	2.0 ± 2.5	1.2 ± 1.6	0.040
Size of adenoma (cm)	2.0 ± 3.1	2.6 ± 2.9	0.061
Sessile type, n	1.8 ± 1.9	1.0 ± 0.9	0.039
Pedunculated type, n	0.4 ± 0.8	0.3 ± 0.7	0.557
Patient discomfort, scores	2.3 ± 1.0	2.3 ± 0.8	0.741

CFC: Cap-fitted colonoscopy; NCF: Non-cap-fitted colonoscopy.

Table 3 Cecal intubation time in all patients (mean ± SD)

	Cecal intubation time	P value
Gender		0.881
Male	254 ± 145
Female	257 ± 135
Age (yr)		0.012
< 60	244 ± 114
≥ 60	322 ± 113
Body mass index (kg/m2)		0.047
< 23	243 ± 114
≥ 23	277 ± 125
History of abdominal surgery		0.044
Yes	387 ± 173
No	221 ± 117
Diverticulosis		0.747
Yes	251 ± 146
No	256 ± 142
Quality of preparation		0.045
0 or 1	278 ± 155
2 or 3	364 ± 183

Table 4 Multivariate analysis for influencing factors on cecal intubation time(s) between cap-fitted colonoscopy and non-cap-fitted colonoscopy (mean ± SD)

	CFC	NCF	P value
Gender
Male	234 ± 109	257 ± 137	0.053
Female	276 ± 173	257 ± 134	0.997
Age (yr)
< 60	249 ± 130	233 ± 106	0.784
≥ 60	244 ± 123	330 ± 213	0.009
Body mass index (kg/m2)
< 23	246 ± 125	240 ± 118	0.067
≥ 23	296 ± 170	248 ± 148	0.674
History of abdominal surgery	240 ± 106	351 ± 219	0.012
Diverticulosis	218 ± 66	279 ± 189	0.169
Quality of preparation
0 or 1	255 ± 133	251 ± 147	0.861
2 or 3	224 ± 96	302 ± 176	0.006

CFC: Cap-fitted colonoscopy; NCF: Non-cap-fitted colonoscopy.