Effectiveness of Fixed PC Interval Using SMS for Afternoon Colonoscopy

Effectiveness of Fixed Preparation-to-Colonoscopy Interval Using Short Message Service (SMS) for Afternoon Colonoscopy: a Randomized Control Study

The purpose of this study is to evaluate the effectiveness of SMS (short message service of mobile phone) reminder to fix PC interval for bowel preparation in afternoon colonoscopy.

Bowel preparation quality for colonoscopy is influenced by several factors and preparation-to-colonoscopy (PC) interval is one of the important factors. The bowel preparation with split-dose PEG (polyethylene glycol) is an obviously uncomfortable process, it is usually difficult to ingest PEG in time. Therefore, the investigators conducted a prospective randomized control study to evaluate the effectiveness of fixed PC interval for satisfactory bowel preparation in the afternoon colonoscopy using mobile phone short message service (SMS), which reported that it could increase patient's compliance in other practical era

Inclusion Criteria:

• 18 and 80 years who were scheduled for afternoon colonoscopy (screening or surveillance)

Exclusion Criteria:

• unavailable mobile phone nor SMS
• age younger than 18 years
• pregnancy
• breastfeeding
• history of large-bowel resection
• renal failure (serum creatinine ≥ 3.0 mg/dL [normal 0.8-1.4])
• drug addiction or major psychiatric illness
• allergy to PEG
• refusal to participate in the study.