Patients will receive bowel preparation instructions in a conventional way in addition to a telephone call for education purposes one day prior to procedure

Patients will receive bowel preparation instructions in a conventional way

Patients undergoing outpatient colonoscopy will receive the standard bowel preparation instructions and a telephone call one day before the procedure to re-explain the instructions and the importance of bowel preparation

We will use Aronchick Scale as bowel preparation quality scale. This scale characterizes the percentage of the total colonic mucosal surface covered by fluid or stool, and is performed before washing or suctioning. This scale grades the adequacy of cleansing in the following:

1. Excellent: Small volume of clear liquid, or greater than 95% of surface seen
2. Good: Large volume of clear liquid covering 5-25% of the surface but greater than 90% of surface seen
3. Fair: Presence of some semi-solid stool that could be suctioned or washed away but greater than 90% of surface seen
4. Poor: Semi-solid stool that could not be suctioned or washed away and less than 90% of surface seen
5. Inadequate: Repreparation needed Bowel preparation will be considered as adequate if the score is ≤ 3 and inadequate if the score of bowel preparation is ≥ 4.

Detect rate of colonic polyps in both groups