The impact of, and views on, school food intervention and policy in young people aged 11-18 years in Europe: A mixed methods systematic review

Understanding the social and environmental influencers of eating behaviours has the potential to improve health outcomes for young people. This review aims to explore the effectiveness of school nutrition interventions and the perceptions of young people experiencing a nutrition focused intervention or change in school food policy. A comprehensive systematic search identified studies published between 1 December 2007 to 20 February 2020. Twenty-seven studies were included: 22 quantitative studies of nutrition related outcomes and five qualitative studies reporting views and perceptions of young people (combined sample of 22,138 participants, mean ages 12-18 years). The primary outcome was nutrition knowledge/dietary behaviours, with secondary outcomes exploring body mass index (BMI) and wellbeing. Due to the heterogeneity of studies, a narrative results description is presented. The findings demonstrate that school nutrition programmes can be effective in reducing sugar, sugar sweetened beverages (SSB) and saturated fat and increasing fruit and vegetable (FV) intake. The lived experiences of young people in a school context provide valuable insights that should be considered in the development of effective school food policy and interventions. This review affirms the significant role that schools can play in supporting good nutrition in all young people and provides opportunities to inform the school food agenda.

Healthier Food and Beverage Interventions in Schools: Four Community Guide Systematic Reviews

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.

Factors that contribute to effective nutrition education interventions in children: a systematic review

Context

Establishing healthy dietary practices at an early age is crucial, as dietary behaviors in childhood track to adulthood.

Objective

The purpose of this systematic review was to identify factors associated with successful nutrition education interventions conducted in children and published between 2009 and 2016.

Data Sources

Using the PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analysis) guidelines, relevant studies were identified through the PubMed, Web of Science, ScienceDirect, and ERIC (Educational Resources Information Center) databases.

Study Selection

Studies published in English between 2009 and 2016 that included a nutrition education intervention among children aged 2 to 19 years were included. Review articles, abstracts, qualitative or cross-sectional studies, and studies targeting children with special nutritional needs were excluded.

Data Extraction

Four authors screened and determined the quality of the studies using the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) system and extracted the data from the articles.

Data Analysis

Forty-one studies were included: 7 targeted preschool children, 26 targeted elementary school children, and 8 targeted secondary school children. A total of 46% met their primary objectives of nutrition education intervention, while the rest either partially achieved or did not achieve their stated objectives.

Results

Successful interventions targeting school children engaged parents by means of face-to-face sessions, identified specific behaviors to be modified, and assured fidelity by training teachers or recruiting trained experts to deliver the intervention. In addition, they allowed adequate dosage, with an intervention duration of at least 6 months, and used age-appropriate activities.

Conclusions

Interventions with a multicomponent approach that were age appropriate and of adequate duration (≥ 6 months), that engaged parents, and that ensured fidelity and proper alignment between the stated objectives, the intervention, and the desired outcomes were more likely to succeed.

Short-Term and Long-Term Effects of a Combined Intervention of Rope Skipping and Nutrition Education for Overweight Children in Northeast China

The aim of the present study was to evaluate whether an exercise intervention, nutrition education, or the combination of both were effective in weight reduction and maintenance for rural school children. Two hundred twenty-nine primary school children aged 9 to 12 years determined as overweight/obese were randomly assigned to 1 of 4 groups: exercise intervention, nutrition education, combination of both, and control. Nutrition education and rope-skipping sessions were performed for 2 months. Anthropometric measurements were administered at baseline, after 2 months (postintervention), and 1 year later (follow-up). The order of change from high to low in the body mass index standard deviation scores (BMI-SDS) between postintervention and baseline was combined intervention, exercise intervention, and nutrition education. The BMI-SDS between following-up and baseline was for combined intervention, exercise intervention, and nutrition education. The combined intervention had the best short-term and long-term effects. The exercise intervention had a better short-term effect than nutrition education, while nutrition education had a better long-term effect than the exercise intervention.

Theory-informed nutrition education curriculum Tools For Feeling Good promotes healthy eating patterns among fifth grade pupils: cross-sectional study

BACKGROUND

The eating patterns of school-aged children rarely meet recommendations: meal frequency is irregular and the consumption of vegetables is lower and sugar-sweetened products higher than recommended. Although school is an excellent arena for nutrition education to support pupils eating patterns, teachers usually lack efficient tools. The present study aimed to develop a curriculum for nutrition education to be used by teachers and to examine its efficacy in the school environment with respect to the eating patterns of pupils.

METHODS

The curriculum was developed in collaboration with school teachers using self-determination theory as a theoretical standpoint. The Health at Every Size concept and sensory-based food education were utilised in the curriculum. Self-reported questionnaires were used to assess the feasibility and impact of the curriculum. Fourteen teachers implemented the curriculum during 2012-2013 with 194 pupils aged 10-13 years (fifth and sixth grades). The control schools included 140 pupils of the same age not following the curriculum.

RESULTS

The teachers reported that the curriculum was easy to integrate in the school environment. The fifth graders improved their breakfast frequency, increased their consumption of vegetables and reduced their consumption of ice cream, sweets and sugar-sweetened drinks. No improvement was found in the fifth graders at the control schools. In the sixth graders, no dietary changes were detected in the intervention or control schools.

CONCLUSIONS

The pupils in the fifth grade appeared to comprise a responsive target group for nutrition education at schools. The curriculum offers a promising approach for developing healthy eating patterns among fifth graders. Collaboration with teachers in developing the curriculum likely enhanced its feasibility and teacher commitment for implementation.

Breakfast consumption and adiposity among children and adolescents: an updated review of the literature

BACKGROUND

Breakfast consumption has been associated with reduced risk of overweight and obesity among children, but previous evidence reviews fail to confirm a causal relationship.

OBJECTIVES

To review recent literature on breakfast consumption and adiposity among children and discuss potential underlying mechanisms.

METHODS

A comprehensive literature search of studies published since the 2010 US National Evidence Library review (January 2010-January 2015) was conducted.

RESULTS

Twelve studies met inclusion criteria. All were conducted in industrialized countries: six in Europe, four in the USA, one in China and one in Australia. Ten of the studies used observational longitudinal designs, with follow-up periods ranging from 1 to 27 years (median: 3, mean: 7.4); of these, eight reported inverse associations between breakfast consumption and excess adiposity, while two found no association. The other studies (1 case-control, 1 experimental) each reported a protective effect of breakfast consumption on overweight and obesity among children.

CONCLUSIONS

Findings corroborate results from previous reviews, adding support for a possible, protective role for breakfast consumption in preventing excess adiposity during childhood and adolescence. However, drawing a causal conclusion from the collective evidence is curtailed by methodological limitations and inconsistencies, including study design, follow-up duration and frequency, exposure and outcome assessment, as well as limited consideration of confounding, mediating and effect-modifying variables. More rigorous study designs employing valid and standardized measurement of relevant variables are needed.

Systematic Review of School-Based Interventions to Modify Dietary Behavior: Does Intervention Intensity Impact Effectiveness?

BACKGROUND

Owing to the associations between diet and health, it is important that effective health promotion strategies establish healthful eating behaviors from an early age. We reviewed the intensity of school-based interventions aimed to modify dietary behavior in preadolescent and adolescents and related intervention characteristics to effectiveness.

METHODS

Our systematic literature search of 8 databases sought to identify interventions measuring dietary intake in school settings to students aged 9 to 18. We evaluated these studies for effectiveness, intensity, intervention category, and follow-up measures.

RESULTS

Of the 105 interventions 81 were found to be effective immediately postintervention, irrespective of intensity. Studies that were 6 weeks to 5 months in duration, targeted students' environment or group (alone or in combination), and reached students only in schools were more effective. Only one-fifth of interventions conducted a follow-up measure, and a majority showed a loss of effectiveness from postintervention to follow-up.

CONCLUSIONS

We identified characteristics of effective interventions. These findings may inform the development of future interventions targeting dietary behavior in preadolescents and adolescents in the school-based setting.

Making a Difference in Migrant Summer School: Testing a Healthy Weight Intervention

OBJECTIVE

Evaluate the effectiveness of a healthy weight intervention designed for children of migrant farmworkers embedded in a 7-week summer Midwest Migrant Education Program (MEP) for changes in: weight; Body Mass Index (BMI); BMI-percentiles (BMI-p); muscle strength and muscle flexibility; nutrition knowledge; attitudes; and behaviors.

DESIGN AND SAMPLE

This is a two-group pre-post quasi-experimental study. Latino children of migrant farmworkers attending summer MEP in grades one through eight were enrolled (n = 171: comparison n = 33, intervention n = 138).

MEASURES

Weight, BMI, BMI-p, muscle strength and flexibility, knowledge, and healthy behaviors.

INTERVENTION

Classroom content included: food variety; increasing fruits and vegetables; healthy breakfasts; more family meals; increasing family time; decreasing TV and electronic game time; increasing physical activity; limiting sugar-sweetened drinks; portion sizes; and food labels.

RESULTS

Statistically significant were increase in comparison group mean weight, decrease in intervention group BMI-p, and improvements in muscle flexibility and healthy behavior attitudes. The intervention students showed trends toward healthy BMI. The number of MEP days attended was significantly correlated in four outcomes.

CONCLUSION

Study findings have the potential to decrease incidence of unhealthy weight in Latino migrant children, reduce rates of premature adult diseases in these children, and a potential to decrease future health care costs.

The major European dietary patterns and metabolic syndrome

Metabolic syndrome (MetS) is a cluster of risk factors that significantly increases the risk of cardiovascular disease. The lack of universally accepted diagnosis criteria makes it difficult to know the real prevalence of MetS in both adult and pediatric population. Lifestyle, especially nutritional habits and physical activity, have been suggested to be independent risk factors for the development of MetS. Recent studies highlight the need to prioritize overall dietary patterns, rather than isolated nutrients, to better appraise the associations between nutritional habits and MetS. In this review we summarize recently published intervention trials and systematic reviews that evaluated the association between overall dietary patterns and the risk of MetS. Westernized dietary patterns, characterized by a high consumption of meat or meat products, snacks, baked desserts and sugar-sweetened beverages, which provide high amounts of saturated fatty acids and simple carbohydrates as added sugars, have been associated with higher risk of MetS. In contrast, more traditional dietary patterns, including the Mediterranean dietary pattern (MDP), characterized by a high consumption of vegetables, fruits, whole cereals and fish are associated with a reduced risk of MetS. The main characteristics of the MDP include a high consumption of nuts and olive oil, resulting in a relatively fat-rich pattern that provides high amounts of mono- and polyunsaturated fatty acids, bioactive polyphenols and dietary fiber. Strong evidence is accumulating to support that a closer conformity with the MDP is inversely associated with the incidence of MetS, cardiovascular risk factors, diabetes and cardiovascular disease.