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This study aimed to summarize the evidence of the impact of school-based nutrition education programs that incorporate technology on the acquisition of nutrition-related knowledge and behavior change of adolescents. Literature searches were conducted using Cochrane Library, Pubmed, Scopus, Science Direct, and Web of Science databases. Studies published between 2000 and 2018, with adolescents aged from 12 to 18 years, fully available in English, which involved technology-based school interventions, and reported nutrition-related outcomes, were included. Thirteen studies met all the inclusion criteria. Overall, all studies presented positive effects, though these results did not persist. It is feasible to use technology-based approaches in this type of intervention programs, but it is necessary to improve the interventions so that long-lasting results are achieved.

Effective obesity interventions in adolescent populations have been identified as an immediate priority action to stem the increasing prevalence of adult obesity. The purpose of this meta-analysis was to make a quantitative analysis of the impact of school-based interventions on body mass index during adolescence. Studies were retrieved from PubMed, Scopus, Science Direct and Web of Science databases. Results were pooled using a random-effects model with 95% confidence interval considered statistically significant. Of the 18 798 possible relevant articles identified, 12 articles were included in this meta-analysis. The global result showed a low magnitude effect, though it was statistically significant (N = 14 428), global e.s. = -0.055, P = 0.004 (95% CI = -0.092, -0.017). Heterogeneity was low among the studies (I[superscript 2] = 9.017%). The funnel plot showed no evidence of publication bias. The rank-correlation test of Begg (P = 0.45641) and Egger's regression (P = 0.19459) confirmed the absence of bias. This meta-analysis reported a significant effect favoring the interventions; however, future research are needed since the reported the evidence was of low magnitude, with the studies following a substantial range of approaches and mostly had a modest methodological quality.