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Types of Studies (e.g., RCTs, quasi-experimental, qualitative)
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Outcome Measures (e.g., BMI, diet, physical activity, other behaviors, environment)
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Length of Intervention and/or Follow-up
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Other
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No. After Applying Criteria
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Included: any study design
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Measure of adiposity (BMI, body weight, skinfold thickness, percent body fat)
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> 8 weeks (for secondary prevention trials)
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Included: English language
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Not reported
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Excluded: meta-analyses and reviews (different selection criteria)
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Excluded: conducted in a developing country; not peer-reviewed; n < 30 in secondary prevention trials, n < 60 in primary prevention trials
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≥ 6 months (for primary prevention trials) (not including duration of follow-up)
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Included: domestic and international studies that used physical activity and nutritional strategies in interventions to prevent or treat overweight
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Measure of weight status, BMI, or body fat
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≥ 3 months study length
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Studies were not excluded because of their aim (for example, did not have to include weight change), design, or duration of intervention or follow-up if ≥ 3 months
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7 (2 treatment and 5 prevention)
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Excluded: case reports or series
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RCTs or controlled clinical trials of lifestyle interventions
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Included: same criteria used by National Institute for Health and Clinical Excellence (NICE) obesity guidance with one exception—included studies had to report a weight outcome, either as absolute or change, and could use BMI, BMI z-score, percentage of body fat, skin-fold thickness, and percentage of overweight
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≥ 12 weeks study length
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Included: minimum duration of 12 weeks; done in a school setting (studies were not included or excluded based on their aim)
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38
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Included: study designs that compared lifestyle interventions (defined in article) with usual care or with other active interventions
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