Studies of interactive electronic interventions delivered as either adjunct or sole interventions for the prevention or treatment of obesity and/or obesity related behaviours in children and/or adolescents (aged 18 years or under) were eligible for inclusion. Interactive electronic interventions were defined as interventions that were delivered via computer-based programs, interactive internet sites, electronic messaging, emails, social networking, e-whiteboards and other media. Relevant outcomes were changes in knowledge, behaviour and physical status.
The included studies considered CD-ROM, internet and emails, internet only and telemedicine. Most studies examined dietary intake and/or physical activity. Some studies examined weight-related concerns and behaviours and psychosocial measures. Some studies focused on obesity prevention. Other studies considered obesity treatment. Most studies were conducted in USA; Germany, Belgium and Taiwan were also represented. Intervention duration varied from two weeks to two years. Several studies used financial or non-financial incentives. Some studies involved parents.
Two reviewers performed study selection. Inclusion was decided by consensus.