Baseline information
| Characteristics | Routine colonoscopy (n=536) | CADe colonoscopy (n=522) | P* value |
| Age, mean (SD) | 49.94 (±13.79) | 51.07 (±13.15) | 0.16 |
| BMI, mean (SD) | 23.02 (±3.14) | 23.03 (±2.93) | 0.99 |
| Withdrawal time, mean (SD) | 6.39 (±1.21) | 6.89 (±1.79) | <0.001 |
| Total time, mean (SD) | 12.10 (±4.08) | 12.52 (±4.38) | 0.11 |
| Insertion time, mean (SD) | 5.71 (±3.90) | 5.63 (±4.03) | 0.75 |
| No polyp withdrawal time, mean (SD) | 6.13 (±1.07) | 6.17 (±0.94) | 0.58 |
| Withdrawal time excluding biopsy, mean (SD) | 6.07 (±1.11) | 6.18 (±1.38) | 0.15 |
| Indication | 0.74 | ||
| Screening, n (%) | 44 (8.21) | 40 (7.66) | |
| Symptomatic, n (%) | 492 (91.79) | 482 (92.34) | |
| Sex | 0.19 | ||
| Female, n (%) | 287 (53.54) | 259 (49.62) | |
| Male, n (%) | 249 (46.46) | 263 (50.38) | |
| BMI category | 0.5 | ||
| <25, n (%) | 408 (76.12) | 403 (77.20) | |
| 25<=BMI<30, n (%) | 117 (21.83) | 113 (21.65) | |
| ≥30, n (%) | 11 (2.05) | 6 (1.15) | |
| Procedure time | 0.61 | ||
| AM, n (%) | 280 (52.24) | 264 (50.57) | |
| PM, n (%) | 256 (47.76) | 258 (49.43) | |
| Endoscope | 0.6 | ||
| CF-H260, n (%) | 156 (29.10) | 160 (30.65) | |
| CF-Q260, n (%) | 380 (70.90) | 362 (69.35) | |
| Anaesthesia† | 0.95 | ||
| No, n (%) | 68 (12.69) | 67 (12.84) | |
| Yes, n (%) | 468 (87.31) | 455 (87.16) | |
| Boston Score, mean (SD) | 6.64 (1.25) | 6.64 (1.21) | 0.95 |
| Boston Score Rank | 0.72 | ||
| Inadequate (sum <6.0 or anyone <2.0), n (%) | 79 (14.74) | 73 (13.98) | |
| Adequate (sum ≥6.0 and everyone ≥2.0), n (%) | 457 (85.26) | 449 (86.02) | |
| Endoscopist experience | 0.33 | ||
| Senior, n (%) | 233 (43.47) | 203 (38.89) | |
| Midlevel, n (%) | 236 (44.03) | 251 (48.08) | |
| Junior, n (%) | 67 (12.50) | 68 (13.03) | |
No polyp withdrawal time means withdrawal time during those colonoscopies where no polyp was detected or removed.
*P value from χ2 test (or Fisher’s exact test, as appropriate) or t-test.
†Anaesthesia was administered with midazolam, fentanyl by an anaesthesiologist who monitored the patients for complications.
BMI, body mass index; NSAID, non-steroidal anti-inflammatory drug.