Original Article
Copyright ©2010 Baishideng.
World J Gastroenterol. Aug 21, 2010; 16(31): 3905-3910
Published online Aug 21, 2010. doi: 10.3748/wjg.v16.i31.3905
Table 1 Baseline characteristics of all patients n (%)
CAC (n = 200)SC (n = 200)P value
Sex (male)102 (51.0)88 (44.0)0.16
Age (yr) (mean ± SD)53.8 ± 15.153.6 ± 14.80.89
Previous difficult colonoscopy19 (9.5)15 (7.5)0.65
Known diverticular disease8 (0.04)11 (0.06)0.74
Previous pelvic surgery25 (12.5)26 (13.0)0.80
Gastroscopy at the same time74 (37.0)89 (44.5)0.17
Indications
CRC screening38 (19.0)35 (17.5)
Rectal bleeding37 (18.5)32 (16.0)
Abdominal pain32 (16.0)33 (16.5)
Polyp follow up30 (15.0)27 (13.5)
Change in bowel habit18 (9.0)28 (14.0)
Others45 (22.5)45 (22.5)0.58
Endoscopist
Specialist41 (20.5)49 (24.5)
Trainee159 (79.5)151 (75.5)0.34
Bowel preparation
Good107 (54.0)130 (65.7)
Satisfactory71 (35.9)53 (26.8)
Poor20 (10.1)15 (7.6)0.10
Scopes used
P160/P180137 (66.5)143 (70.5)
A160/A18063 (32.0)57 (28.5)0.61
Table 2 Primary outcomes: performance of colonoscopy n (%)
CACSCP value
Cecal intubation rate192/200 (96.0)195/200 (97.0)0.401
Cecal intubation rate by trainees140/159 (88.1)128/151 (84.8)0.401
Ileal intubation rate165/200 (82.5)158/200 (79.0)0.381
Ileal intubation rate by trainees126/159 (79.2)115/151 (76.2)0.511
Cecal time (min) (mean ± SD) (n = 387)9.94 ± 7.0510.34 ± 6.820.212
Trainee cecal time (min) (mean ± SD) (n = 268)10.72 ± 6.759.66 ± 4.860.642
Total colonoscopy time (min) (mean ± SD) (n = 387)23.24 ± 13.9522.56 ± 9.940.862
Trainee total colonoscopy time (min) (mean ± SD) (n = 268)25.97 ± 1.2223.70 ± 0.720.472
Table 3 Multivariate analysis of determinants of faster cecal intubation time
Independent predictorsB195% CIP value
Consultant0.550.47-0.63< 0.001
Female sex1.381.22-1.57< 0.001
Use of hyoscine1.481.21-1.81< 0.001
Poor preparation1.331.07-1.66  0.01
Table 4 Secondary outcomes: polyp detection rate n (%)
CACSCP value
Subjects with polyps (n = 387)63/192 (32.8)61/195 (31.3)0.751
Subjects aged ≥ 50 yr with polyps (n = 246)51/118 (43.2)46/128 (35.9)0.241
Total number of polyps1471070.592
Total number of polyps with size ≤ 5 mm121840.452
Total number of adenomas75550.262
Total number of advanced adenomas23140.522
Table 5 Multivariate analysis of determinants of higher polyp detection rate
Independent predictorsOR95% CIP value
Age1.4501.213-1.734 < 0.001
Previous abdominal surgery0.5590.322-0.9710.039
Having EGD on the same setting0.4510.266-0.7650.003
Consultant0.4600.250-0.8450.012
Use of hyoscine2.8771.374-6.0260.005
Indication: polyp follow-up2.7221.342-5.5230.006