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Context: Healthy eating during childhood is important for optimal growth and helps reduce the risk of obesity, which has potentially serious health consequences. Changing the school food environment may offer one way to improve students' dietary intake. This manuscript reports 4 Community Guide systematic reviews examining the effectiveness of interventions in schools promoting healthy eating and weight.Evidence Acquisition: School obesity prevention programs aiming to improve diet were identified from a 2013 Agency for Health Care Research and Quality systematic review and an updated search (August 2012-January 4, 2017). In 2017-2018, Community Guide systematic review methods were used to assess effectiveness as determined by dietary behavior and weight changes.Evidence Synthesis: Interventions improving school meals or offering fruits and vegetables (n=27 studies) are considered effective. Evidence is insufficient to determine the effectiveness of interventions supporting healthier snack foods and beverages outside of school meal programs given inconsistent findings (n=13 studies). Multicomponent interventions to increase availability of healthier foods and beverages are considered effective. These interventions must include 1 component from school meals or fruit and vegetable programs and interventions supporting healthier snack foods and beverages (n=12 studies). There is insufficient evidence to determine the effectiveness of interventions to increase water access because only 2 studies met inclusion criteria.Conclusions: A total of 2 school-based dietary interventions have favorable effects for improving dietary habits and modest effects for improving or maintaining weight. More evidence is needed regarding interventions with insufficient findings. These reviews may inform researchers and school administrators about healthy eating and obesity prevention interventions. [ABSTRACT FROM AUTHOR]

The article describes living systematic reviews, which refers to systematic reviews that are updated and searched frequently, and incorporate newly identified studies into their review. Two published living systematic review examples are described: one focusing upon traumatic brain injury in European countries and one on nutrition interventions for children.

Introduction: Intimate partner violence and sexual violence are widespread and often occur early in life. This systematic review examines the effectiveness of interventions for primary prevention of intimate partner violence and sexual violence among youth.Methods: Studies were identified from 2 previous systematic reviews and an updated search (January 2012-June 2016). Included studies were implemented among youth, conducted in high-income countries, and aimed to prevent or reduce the perpetration of intimate partner violence or sexual violence. In 2016-2017, Guide to Community Preventive Services (Community Guide) methods were used to assess effectiveness as determined by perpetration, victimization, or bystander action. When heterogeneity of outcomes prevented usual Community Guide methods, the team systematically applied criteria for favorability (statistically significant at p<0.05 or approaching significance at p<0.10) and consistency (75% of results in the same direction).Results: A total of 28 studies (32 arms) met inclusion and quality of execution criteria. Interventions used combinations of teaching healthy relationship skills, promoting social norms to protect against violence, or creating protective environments. Overall, 18 of 24 study arms reported favorable results on the basis of the direction of effect for decreasing perpetration; however, favorability for bystander action diminished with longer follow-up. Interventions did not demonstrate consistent results for decreasing victimization. A bridge search conducted during Fall 2020 confirmed these results.Discussion: Interventions for the primary prevention of intimate partner violence and sexual violence are effective in reducing perpetration. Increasing bystander action may require additional follow-up as effectiveness diminishes over time. Findings may inform researchers, school personnel, public health, and other decision makers about effective strategies to prevent intimate partner violence and sexual violence among youth. [ABSTRACT FROM AUTHOR]

Context: Sedentary time spent with screen media is associated with obesity among children and adults. Obesity has potentially serious health consequences, such as heart disease and diabetes. This Community Guide systematic review examined the effectiveness and economic efficiency of behavioral interventions aimed at reducing recreational (i.e., neither school- nor work-related) sedentary screen time, as measured by screen time, physical activity, diet, and weight-related outcomes.Evidence Acquisition: For this review, an earlier ("original") review (search period, 1966 through July 2007) was combined with updated evidence (search period, April 2007 through June 2013) to assess effectiveness of behavioral interventions aimed at reducing recreational sedentary screen time. Existing Community Guide systematic review methods were used. Analyses were conducted in 2013-2014.Evidence Synthesis: The review included 49 studies. Two types of behavioral interventions were evaluated that either (1) focus on reducing recreational sedentary screen time only (12 studies); or (2) focus equally on reducing recreational sedentary screen time and improving physical activity or diet (37 studies). Most studies targeted children aged ≤13 years. Children's composite screen time (TV viewing plus other forms of recreational sedentary screen time) decreased 26.4 (interquartile interval= -74.4, -12.0) minutes/day and obesity prevalence decreased 2.3 (interquartile interval= -4.5, -1.2) percentage points versus a comparison group. Improvements in physical activity and diet were reported. Three study arms among adults found composite screen time decreased by 130.2 minutes/day.Conclusions: Among children, these interventions demonstrated reduced screen time, increased physical activity, and improved diet- and weight-related outcomes. More research is needed among adolescents and adults. [ABSTRACT FROM AUTHOR]

Context: Adolescent pregnancy, HIV, and other sexually transmitted infections (STIs) are major public health problems in the U.S. Implementing group-based interventions that address the sexual behavior of adolescents may reduce the incidence of pregnancy, HIV, and other STIs in this group. Evidence acquisition: Methods for conducting systematic reviews from the Guide to Community Preventive Services were used to synthesize scientific evidence on the effectiveness of two strategies for group-based behavioral interventions for adolescents: (1) comprehensive risk reduction and (2) abstinence education on preventing pregnancy, HIV, and other STIs. Effectiveness of these interventions was determined by reductions in sexual risk behaviors, pregnancy, HIV, and other STIs and increases in protective sexual behaviors. The literature search identified 6579 citations for comprehensive risk reduction and abstinence education. Of these, 66 studies of comprehensive risk reduction and 23 studies of abstinence education assessed the effects of group-based interventions that address the sexual behavior of adolescents, and were included in the respective reviews. Evidence synthesis: Meta-analyses were conducted for each strategy on the seven key outcomes identified by the coordination team—current sexual activity; frequency of sexual activity; number of sex partners; frequency of unprotected sexual activity; use of protection (condoms and/or hormonal contraception); pregnancy; and STIs. The results of these meta-analyses for comprehensive risk reduction showed favorable effects for all of the outcomes reviewed. For abstinence education, the meta-analysis showed a small number of studies, with inconsistent findings across studies that varied by study design and follow-up time, leading to considerable uncertainty around effect estimates. Conclusions: Based on these findings, group-based comprehensive risk reduction was found to be an effective strategy to reduce adolescent pregnancy, HIV, and STIs. No conclusions could be drawn on the effectiveness of group-based abstinence education. [Copyright &y& Elsevier]