Abstract
BackgroundData on the effects of motivational interviewing (MI) on modifying unhealthy lifestyles and promoting weight status during childhood is controversial. Adolescents are more prone to assume higher personal responsibilities for behavioral changes. This study aims to investigate whether MI will improve weight management process in adolescents.Methods/designA systematic review will be conducted on clinical trials, assessing the effect of MI on weight management processes in adolescents, aged 10 to 19 years. The primary objective is to assess the efficacy of MI in controlling weight-related measures in overweight and obese adolescents. Secondary objectives are assessing the efficacy of MI on obesity-related behaviors and cognitive abilities considering heterogeneity in outcomes of primary studies in different MI settings. Main data sources include MEDLINE/PubMed, Scopus, Embase, Web of Science, Cochrane, and PsycINFO from 1980 to May, 2018, with no language restrictions. Study selection, data extraction, and risk of bias assessment will be performed by two independent reviewers. A meta-analysis will be conducted on relevant outcomes. Data will be analyzed for outcome of interest using the 95% confidence interval (CI) of an estimate for dichotomous outcomes and mean differences (MDs) for continious outcomes. Cochrane’s Q statistic and the I2 statistic will be performed to evaluate the heterogeneity. Subgroup analysis and suitable analytical strategies will be conducted to identify the potential sources of heterogeneity. As we expect a high heterogeneity in our included studies, pooled risk ratios (RRs) and 95% CI will be calculated to estimate the overall effect sizes, using meta-regression models or finite mixture modeling through conducting random effect methods. GRADE system will be used to evaluate the certainty of evidence. We will also use subgroup analysis and the GRADE system to investigate the effect of methodological quality of primary studies on results of meta-analysis. Funnel plots and egger and beggs test and plot will be implemented to assess publication bias.DiscussionThe results of this systematic review will provide more insights regarding the effect of MI on weight management in adolescents and will be useful for future research and health promotion programs in this age group.Systematic review registrationPROSPERO 2017:CRD42017069813.
Highlights
Data on the effects of motivational interviewing (MI) on modifying unhealthy lifestyles and promoting weight status during childhood is controversial
The results of this systematic review will provide more insights regarding the effect of MI on weight management in adolescents and will be useful for future research and health promotion programs in this age group
Primary objectives Evaluating the effects of motivational interviewing to control weight-related measures, i.e., body mass index (BMI), BMI z-score, waist circumference (WC), hip circumference (HC), waist to hip ratio (WHR), height to weight ratio (HWtR), in overweight and obese adolescents, aged 10–19 years
Summary
Data on the effects of motivational interviewing (MI) on modifying unhealthy lifestyles and promoting weight status during childhood is controversial. Behavioral interventions to modify both diet and daily physical activity have been demonstrated to be the most effective strategy for weight management in children and adolescents [7,8,9,10]. In this regard, several cognitive behavioral strategies, those focused on the stimulus control and lifestyle self-monitoring, have been shown to be able to support healthy weight in childhood [10,11,12,13,14]. MI is being widely used for triggering behavior change and it has been proposed to be effective in promoting healthy behaviors and enhancing weight loss in obese and overweight individuals [18,19,20]
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