Picoprep versus Moviprep.

Interventions: One group receives twice 150 ml of Picoprep and the other group twice 1 litre of Moviprep. Both have to take ample extra clear fluids up to a total of 3-4 litres according to their schedule of bowel preparation and colonoscopy time. Also a 2-day fibre-free diet is recommended. Primary outcome(s): The primary outcome is the achievement of a good cleansing (Ottawa) score, and quality standards such as the caecal intubation rate, intubation and withdrawal time, polyp detection rate and complications. Study Design: Randomized controlled trial, Single blinded (masking used), Active, Parallel