129 6 Better Stoma Care using the Stoma App – does it help? tell other participants or patients about the content of their version of the app. Participants used the app according to their own preferences without any intervention of the research team, however, they had the option the contact the research team for technical support if needed. Procedures Participants were supported by the app ‘Stoma App’ immediately after inclusion until three months postoperative or until stoma reversal. The intervention group had access to the full version of the app. In this version, information is provided in a generic information library, and personalised timeline triggering push notifications. These push notifications were used to inform and activate patients at specific times. All information could be recalled at any moment in time. Participants could watch instruction videos on stoma care, and register their weight, fluid intake, stoma production, and the process of stoma self-care. Participants also had the option to interact anonymously with other patients (who used the public, restricted version of the app). The control group received a restricted version of the app that contained generic stomarelated information, lacking personalization and timing. This information was comparable with the standard patient information folders typically used in the Netherlands. Both groups were required to complete questionnaires through the app. The Stoma App is CEmarked (NL-CA002-2020-53630), complies with the General Data Protection Regulation, and follows ISO 27001 data and security guidelines.18 Outcome The primary outcome is Stoma QoL. To correct for potential cofounding on digital literacy, participants completed a questionnaire on their mobile proficiency. Secondary outcome measures included psychological adaptation, postoperative outcomes, stoma-related problems, and number of contact moments with the ostomy nurse at the outpatient clinic.
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