Table 1

Baseline characteristics of the study patients

TRE (n=305)Control (n=300)p Value
Age (years)44.8±12.545.7±12.60.382
Female gender47.5%51.0%0.395
BMI (kg/m2)22.4±3.222.8±3.40.156
Grade of education0.514
 Elementary school or no education43.0%40.3%
 Higher than elementary school57.0%59.7%
Constipation18.7%17.0%0.588
Previous bowel preparation30.5%33.7%0.403
Previous surgery (abdominal or pelvic)18.4%20.0%0.609
Interval from appointment to colonoscopy (days)3.4±0.83.5±0.90.259
Indication for colonoscopy0.553
 Screening6.6%8.7%
 Diagnostic85.2%84.3%
 Surveillance8.2%7.0%
Purgative type0.761
 PEG-ELP77.7%76.7%
 SP22.3%23.3%
Patients cancelling colonoscopy29270.829
 ‘Bad’ bowel preparation260.174
 Personal reasons27210.399
  • Values are mean±SD, % or number.

  • BMI, body mass index; PEG-ELP, polyethylene glycol electrolyte powder; SP, sodium phosphate; TRE, telephone re-education.