43 2 Mobile applications in gastrointestinal surgery: a systematic review Study Country Study design Control group Follow -up Surgical procedure Participants App category Main app functions Study outcomes Type N= Age Mangieri 2019 US RCT Yes 24 months Bariatric surgery Patients 28; 28 53; 53 Weight loss - Nutritional information - Self-reported assessment on intake and weight - Personalized diet program - Significant more weight loss after 1 year (81.4% vs 74.4%) - Significant more weight loss after 2 years (71.5% vs 59.1%) - No difference in quality of life Dolan 2019 US Prospective Cohort No 30 days Bariatric surgery Patients 10 38 Weight loss - Self-reported assessment on intake and symptoms - Informative library - Push notifications - Activity tracker - 84% patients completed at least 70% of daily task - 2,7/5 level of patient satisfaction Sysko 2022 US Pilot RCT Yes 8 weeks Bariatric surgery Patients 25; 25 40; 38 Weight loss - Informative library - Self-reported assessment on intake and weight - Social challenges and feedback - Activity tracker - Effect size stress -0.58 - Effect size anxiety -0.62 - No difference in the caloric intake, weight loss or quality of life Mundi 2015 US Feasibility study No 4 months Bariatric surgery Patients 30 41 Weight loss - Automatic text messages - 31% response rate - 7.3 kg weight loss Bonn 2020 Sweden Study Protocol RCT Yes 24 months Bariatric surgery Patients 154 (sample size) - Weight loss - Informative library - Daily milestones on activity and vitamin intake - Feedback on activity and vitamin intake - Daily questionnaires - Tracking activity using an accelerometer - Level of physical activity - Weight loss
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