1.
基线数据
Baseline demographic data of the patients
| Factor | n (%) | Factor | n (%) |
| *Data missing because 3.2% of the colonoscopy procedures cannot reach cecum. | |||
| Gender (%) | Abdominal surgery history (%) | ||
| Male | 182 (64.3%) | Yes | 75 (26.5%) |
| Female | 101 (35.7%) | No | 208 (73.5%) |
| Age (year, Mean±SD) | 46.43±14.57 | Endoscopy experience (%) | |
| ≤40 | 99 (35%) | Yes | 96 (33.9%) |
| > 40 | 184 (65%) | No | 187 (66.1%) |
| BMI (kg/m2, Mean±SD) | 22.67±3.72 | Abdominal pain (%) | |
| < 18.5 (underwight) | 33 (11.7%) | Yes | 72 (25.4%) |
| -25 (normal) | 188 (66.4%) | No | 211 (74.6%) |
| -28 (overweight) | 48(17%) | Self-predict pain scale (%) | |
| -32 (obese) | 11 (3.9%) | Mild pain | 227 (80.2%) |
| > 32 (severe obese) | 3(1.1%) | Severe pain | 31 (10.9%) |
| Operator experience | Nervous scale (%) | ||
| < 500 cases | 92 (3.25%) | Mildly nervous | 246 (86.9%) |
| 500-1000 cases | 59 (20.8%) | Severely nervous | 24 (8.5%) |
| 1000-5000 cases | 81 (28.6%) | Reach cecum (%) | |
| > 5000 cases | 51 (18%) | Yes No |
274 (96.8%) 9 (3.2%) |
| Education (%) | Bowel cleanliness (Mean±SD, points) |
4.98±1.19 | |
| Primary school or below | 61 (21.6%) | Pass | 216(76.3%)* |
| Middle school | 92 (32.5%) | Bad | 58 (20.5%)* |
| High school | 58 (20.5%) | Insert abdominal pain scale (Mean士SD, points) | 3.65±2.04 |
| College | 72 (25.4%) | 0-4 points | 93 (32.9%) |
| Master's degree or above | 3(1.1%) | 5-10 points | 190(67.1%) |