Baseline characteristics of study patients
| Control (n=259) | Intervention (n=256) | Total (n=515) | |
| Female sex (n, %) | 140 (54.1) | 122 (47.7) | 262 (50.9) |
| Age, median (IQR) | 43.0 (34–51) | 40.0 (34–49) | 42.0 (34–50) |
| BMI (n, %) | |||
| Underweight (<18.5) | 18 (6.9) | 27 (10.5) | 45 (8.7) |
| Normal (18.5 to <23) | 169 (65.3) | 152 (59.4) | 321 (62.3) |
| Overweight/obesity (≥23) | 72 (27.8) | 77 (30.1) | 149 (28.9) |
| Having gastrointestinal symptoms before examination (n, %) | 229 (88.4) | 221 (86.3) | 450 (87.4) |
| History of prior colonoscopy (n, %) | 111 (42.9) | 85 (33.2) | 196 (38.1) |
| Last meal (n, %) | |||
| Solid food | 183 (70.7) | 204 (79.7) | 397 (75.1) |
| Fibre food | 195 (75.3) | 199 (77.7) | 394 (76.5) |
| Fruits with seeds | 36 (15.3) | 34 (15.2) | 70 (15.3) |
| Coloured/carbonated drink | 52 (22.4) | 68 (30.0) | 120 (26.1) |
Bold values are statistically significant.
BMI, body mass index.