Influence of a behavioural incentive and intensive education on the quality of bowel preparation prior to diagnostic colonoscopies

INTERVENTION: Arm 1: Standard care. Patients were prescribed a 3‐litre split‐dose PEG bowel preparation and a 12‐page colour information booklet (Princess Alexandra Hospital resource: "Preparing for your colonoscopy")was mailed to them a month prior to the procedure. Arm 2: Reward. As per standard care plus offered a financial reward (an instant scratchie ticket for a state‐wide lottery with a jackpot of up to $25,000) if they achieve a “good or very goodâ€? quality rating of the preparation. Arm 3: Intensified education. As per standard care (12‐page education booklet mailed out a month prior to procedure) plus additional one‐on‐one education two weeks prior to their procedure, delivered by an endoscopy nurse over the phone (duration 5 to 20 minutes where bowel preparation instructions were reviewed, and patient's queries answered). CONDITION: Bowel preparation for colonoscopy; ; Bowel preparation for colonoscopy Oral and Gastrointestinal ‐ Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon PRIMARY OUTCOME: Quality of bowel preparation for their colonoscopy procedure (by using the Boston Bowel Preparation Scale)[At the time of patient's colonoscopy procedure] SECONDARY OUTCOME: Adenoma detection rate by polypectomy at the time of procedure[Once pathology results become available post the colonoscopy procedure] Polyp detection rate by polypectomy at the time of the procedure ; [At the time of patient's colonoscopy procedure (once pathology is processed ; ] SAGIS questionnaire score (overall score that is calculated based on upper and lower gastrointestinal symptoms that patient experiences)[At data analysis stage, once the study is concluded] INCLUSION CRITERIA: Adults from the general gastroenterology clinic referred for an elective colonoscopy