Baseline characteristics of the study patients
| TRE (n=305) | Control (n=300) | p Value | |
|---|---|---|---|
| Age (years) | 44.8±12.5 | 45.7±12.6 | 0.382 |
| Female gender | 47.5% | 51.0% | 0.395 |
| BMI (kg/m2) | 22.4±3.2 | 22.8±3.4 | 0.156 |
| Grade of education | 0.514 | ||
| Elementary school or no education | 43.0% | 40.3% | |
| Higher than elementary school | 57.0% | 59.7% | |
| Constipation | 18.7% | 17.0% | 0.588 |
| Previous bowel preparation | 30.5% | 33.7% | 0.403 |
| Previous surgery (abdominal or pelvic) | 18.4% | 20.0% | 0.609 |
| Interval from appointment to colonoscopy (days) | 3.4±0.8 | 3.5±0.9 | 0.259 |
| Indication for colonoscopy | 0.553 | ||
| Screening | 6.6% | 8.7% | |
| Diagnostic | 85.2% | 84.3% | |
| Surveillance | 8.2% | 7.0% | |
| Purgative type | 0.761 | ||
| PEG-ELP | 77.7% | 76.7% | |
| SP | 22.3% | 23.3% | |
| Patients cancelling colonoscopy | 29 | 27 | 0.829 |
| ‘Bad’ bowel preparation | 2 | 6 | 0.174 |
| Personal reasons | 27 | 21 | 0.399 |
Values are mean±SD, % or number.
BMI, body mass index; PEG-ELP, polyethylene glycol electrolyte powder; SP, sodium phosphate; TRE, telephone re-education.