• Tarcisus Jian Hui Ho, Cindy Ching Siang Lee, Suei Nee Wong, and Ying Lau.
• Staff Nurse I, Health Promotion Board, Singapore.
• Int J Med Inform. 2018 Dec 1; 120: 20-30.

BackgroundInternet-based self-monitoring intervention offers accessibleand convenient weight management. This review aimed to systematically review the evidence on the effectiveness of internet-based self-monitoring intervention for overweight and obese adolescents.MethodPubMed, CINAHL, Cochrane Library, EMBASE, ProQuest, PsycINFO and SCOPUS were systematically searched for randomised controlled trials (RCTs) from inception until December 13, 2017. The risk of bias and strength of evidence was assessed using the Cochrane Collaboration Risk of Bias Tool and the Grading of Recommendations, Assessment, Development and Evaluations criteria. Meta-analysis was performed on the RevMan software using a random effects model. The overall effect was assessed using effect size (Cohen'sd)and heterogeneity was evaluated using Cochrane Q and I2 values. PROSPERO database #CRD42016050089.ResultsA total of 6841 records were identified. Six RCTs in 10 articles were selected amongst 505 adolescents across three countries who were overweight and obese. The meta-analysis revealed a small effect on the reduction of body mass index (BMI) and BMI z-scores (d = 0.30, 95% CI: -0.48 to -0.12). Subgroup analyses suggest the use of daily multicomponent self-monitoring, specified goal setting, face-to-face counselling and parental involvement. The overall quality of evidence was low due to the risk of bias and imprecision.ConclusionInternet-based self-monitoring intervention is a possible approach for overweight and obese adolescents to reduce their BMI. Further well-designed RCTs with follow-up data and large sample sizes are needed to ensure the robustness of the evidence.Copyright © 2018 Elsevier B.V. All rights reserved.

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