Table 2

Characteristics of procedures (time, number of biopsies) by randomization arm

First colonoscopySecond colonoscopy
Intensive inspection armChromoendoscopy armIntensive inspection armChromoendoscopy arm
No. subjects23272327
Procedure time (min)21.6 ± 10.820.1 ± 10.027.3 ± 6.236.9 ± 14.5
No. subjects with biopsies15 (65%)12 (44%)12 (52%)19 (70%)
No. subjects with polyps14 (61%)11 (41%)8 (35%)17 (63%)
No. subjects with adenomas11 (48%)6 (22%)4 (17%)12 (44%)
No. biopsies per subject1.8 ± 2.81.3 ± 1.90.7 ± 0.82.4 ± 2.3
No. polyps per subject1.4 ± 2.51.0 ± 1.80.4 ± 0.71.3 ± 1.4
No. adenomas per subject0.9 ± 1.90.7 ± 1.70.2 ± 0.50.7 ± 1.0