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41 CAI before colonoscopy is as effective as nurse counselling, a clinical pilot trial Figure 1. Flowchart Computer assisted instruction We designed an interactive CAI, according to current best practices, such as good accessibility, plain language and a presentation that engaged the user. 19 We presented the information in a stepwise fashion. CAI consists of a web-based platform using video to mimic the patient journey with a voiceover supported by photo’s, 3D animation and instructive texts. (figure 2., CAI is available in Dutch via https://trials.medify.eu/ cai-colonoscopy ) The video was presented in short clips, maximum of 45 seconds, to 2