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Effectiveness of school food environment policies on children's dietary behaviors: A systematic review and meta-analysis.
Micha, R, Karageorgou, D, Bakogianni, I, Trichia, E, Whitsel, LP, Story, M, Peñalvo, JL, Mozaffarian, D
PloS one. 2018;(3):e0194555
Abstract
BACKGROUND School food environment policies may be a critical tool to promote healthy diets in children, yet their effectiveness remains unclear. OBJECTIVE To systematically review and quantify the impact of school food environment policies on dietary habits, adiposity, and metabolic risk in children. METHODS We systematically searched online databases for randomized or quasi-experimental interventions assessing effects of school food environment policies on children's dietary habits, adiposity, or metabolic risk factors. Data were extracted independently and in duplicate, and pooled using inverse-variance random-effects meta-analysis. Habitual (within+outside school) dietary intakes were the primary outcome. Heterogeneity was explored using meta-regression and subgroup analysis. Funnel plots, Begg's and Egger's test evaluated potential publication bias. RESULTS From 6,636 abstracts, 91 interventions (55 in US/Canada, 36 in Europe/New Zealand) were included, on direct provision of healthful foods/beverages (N = 39 studies), competitive food/beverage standards (N = 29), and school meal standards (N = 39) (some interventions assessed multiple policies). Direct provision policies, which largely targeted fruits and vegetables, increased consumption of fruits by 0.27 servings/d (n = 15 estimates (95%CI: 0.17, 0.36)) and combined fruits and vegetables by 0.28 servings/d (n = 16 (0.17, 0.40)); with a slight impact on vegetables (n = 11; 0.04 (0.01, 0.08)), and no effects on total calories (n = 6; -56 kcal/d (-174, 62)). In interventions targeting water, habitual intake was unchanged (n = 3; 0.33 glasses/d (-0.27, 0.93)). Competitive food/beverage standards reduced sugar-sweetened beverage intake by 0.18 servings/d (n = 3 (-0.31, -0.05)); and unhealthy snacks by 0.17 servings/d (n = 2 (-0.22, -0.13)), without effects on total calories (n = 5; -79 kcal/d (-179, 21)). School meal standards (mainly lunch) increased fruit intake (n = 2; 0.76 servings/d (0.37, 1.16)) and reduced total fat (-1.49%energy; n = 6 (-2.42, -0.57)), saturated fat (n = 4; -0.93%energy (-1.15, -0.70)) and sodium (n = 4; -170 mg/d (-242, -98)); but not total calories (n = 8; -38 kcal/d (-137, 62)). In 17 studies evaluating adiposity, significant decreases were generally not identified; few studies assessed metabolic factors (blood lipids/glucose/pressure), with mixed findings. Significant sources of heterogeneity or publication bias were not identified. CONCLUSIONS Specific school food environment policies can improve targeted dietary behaviors; effects on adiposity and metabolic risk require further investigation. These findings inform ongoing policy discussions and debates on best practices to improve childhood dietary habits and health.
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The influence of parental practices on child promotive and preventive food consumption behaviors: a systematic review and meta-analysis.
Yee, AZ, Lwin, MO, Ho, SS
The international journal of behavioral nutrition and physical activity. 2017;(1):47
Abstract
BACKGROUND The family is an important social context where children learn and adopt eating behaviors. Specifically, parents play the role of health promoters, role models, and educators in the lives of children, influencing their food cognitions and choices. This study attempts to systematically review empirical studies examining the influence of parents on child food consumption behavior in two contexts: one promotive in nature (e.g., healthy food), and the other preventive in nature (e.g., unhealthy food). METHODS From a total of 6,448 titles extracted from Web of Science, ERIC, PsycINFO and PubMED, seventy eight studies met the inclusion criteria for a systematic review, while thirty seven articles contained requisite statistical information for meta-analysis. The parental variables extracted include active guidance/education, restrictive guidance/rule-making, availability, accessibility, modeling, pressure to eat, rewarding food consumption, rewarding with verbal praise, and using food as reward. The food consumption behaviors examined include fruits and vegetables consumption, sugar-sweetened beverages, and snack consumption. RESULTS Results indicate that availability (Healthy: r = .24, p < .001; Unhealthy: r = .34, p < .001) and parental modeling effects (Healthy: r = .32, p < .001; Unhealthy: r = .35, p < .001) show the strongest associations with both healthy and unhealthy food consumption. In addition, the efficacy of some parenting practices might be dependent on the food consumption context and the age of the child. For healthy foods, active guidance/education might be more effective (r = .15, p < .001). For unhealthy foods, restrictive guidance/rule-making might be more effective (r = -.11, p < .01). For children 7 and older, restrictive guidance/rule-making could be more effective in preventing unhealthy eating (r = - .20, p < .05). For children 6 and younger, rewarding with verbal praise can be more effective in promoting healthy eating (r = .26, p < .001) and in preventing unhealthy eating (r = - .08, p < .01). CONCLUSIONS This study illustrates that a number of parental behaviors are strong correlates of child food consumption behavior. More importantly, this study highlights 3 main areas in parental influence of child food consumption that are understudied: (1) active guidance/education, (2) psychosocial mediators, and (3) moderating influence of general parenting styles.
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Non-Responsive Feeding Practices, Unhealthy Eating Behaviors, and Risk of Child Overweight and Obesity in Southeast Asia: A Systematic Review.
Lindsay, AC, Sitthisongkram, S, Greaney, ML, Wallington, SF, Ruengdej, P
International journal of environmental research and public health. 2017;(4)
Abstract
Childhood obesity is increasing dramatically in many Southeast Asian countries, and becoming a significant public health concern. This review summarizes the evidence on associations between parental feeding practices, child eating behaviors, and the risk of overweight and obesity in Southeast Asian children 2-12 years old. We systematically searched five electronic academic/research (PubMed, PsycINFO, ProQuest Nursing, Medline, and CINAHL) databases using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement for peer-reviewed studies published in English between January 2000 and December 2016. Fourteen observational studies met the inclusion criteria and were reviewed. Reviewed studies were examined separately for preschool- and school-aged children and revealed that non-responsive parental feeding practices and unhealthy child eating behaviors were associated with a risk of child overweight and obesity in several Southeast Asian countries. Nonetheless, due to the small number of identified studies (n = 14) and because only about half of the Southeast Asian countries (Thailand, Vietnam, Singapore, the Philippines, and Malaysia) were represented (5/11) in the examined studies, additional research is needed to further understand the factors associated with childhood obesity among children in Southeast Asia to develop interventions that are tailored to the specific needs of Southeast Asian countries and designed to address practices and behaviors that may promote childhood obesity.
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Barriers and facilitators to young children's physical activity and sedentary behaviour: a systematic review and synthesis of qualitative literature.
Hesketh, KR, Lakshman, R, van Sluijs, EMF
Obesity reviews : an official journal of the International Association for the Study of Obesity. 2017;(9):987-1017
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Abstract
Positive activity behaviours (i.e. higher physical activity [PA]/lower sedentary behaviour [SB]) are beneficial from infancy, yet evidence suggests that young children (0- to 6-year-olds) are relatively inactive. To better understand the perceived influences on these behaviours and to aid intervention development, this paper systematically synthesizes the extensive qualitative literature regarding perceived barriers and facilitators to PA and SB in young children (0-6 years old). A search of eight electronic databases (July 2016) identified 43 papers for inclusion. Data extraction and evidence synthesis were conducted using thematic content analysis, underpinned by the socio-ecological model (i.e. individual, interpersonal, community, organizational and policy levels). Parents, childcare providers and children perceived seven broad themes to be important for PA and SB, including the child; the home; out-of-home childcare; parent-childcare provider interactions; environmental factors; safety; and weather. Each theme mapped onto between one and five levels of the socio-ecological model; barriers and facilitators at the interpersonal level (e.g. parents, care providers and family) were most frequently cited, reflecting the important (perceived) role adults/peers play in shaping young children's behaviours. We provide an overarching framework to explain PA and SB in early childhood. We also highlight where gaps in the current literature exist (e.g. from male carers; in developing countries; and barriers and facilitators in the environmental and policy domains) and where future quantitative work may focus to provide novel insights about children's activity behaviours (e.g. safety and weather).
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Diet and ADHD, Reviewing the Evidence: A Systematic Review of Meta-Analyses of Double-Blind Placebo-Controlled Trials Evaluating the Efficacy of Diet Interventions on the Behavior of Children with ADHD.
Pelsser, LM, Frankena, K, Toorman, J, Rodrigues Pereira, R
PloS one. 2017;(1):e0169277
Abstract
INTRODUCTION Attention-deficit/hyperactivity disorder (ADHD) is a debilitating mental health problem hampering the child's development. The underlying causes include both genetic and environmental factors and may differ between individuals. The efficacy of diet treatments in ADHD was recently evaluated in three reviews, reporting divergent and confusing conclusions based on heterogeneous studies and subjects. To address this inconsistency we conducted a systematic review of meta-analyses of double-blind placebo-controlled trials evaluating the effect of diet interventions (elimination and supplementation) on ADHD. METHODS Our literature search resulted in 14 meta-analyses, six of which confined to double-blind placebo-controlled trials applying homogeneous diet interventions, i.e. artificial food color (AFC) elimination, a few-foods diet (FFD) and poly-unsaturated fatty acid (PUFA) supplementation. Effect sizes (ES) and Confidence intervals (CI) of study outcomes were depicted in a forest plot. I2 was calculated to assess heterogeneity if necessary and additional random effects subgroup meta-regression was conducted if substantial heterogeneity was present. RESULTS The AFC ESs were 0.44 (95% CI: 0.16-0.72, I2 = 11%) and 0.21 (95% CI: -0.02-0.43, I2 = 68%) [parent ratings], 0.08 (95% CI: -0.07-0.24, I2 = 0%) [teacher ratings] and 0.11 (95% CI: -0.13-0.34, I2 = 12%) [observer ratings]. The FFD ESs were 0.80 (95% CI: 0.41-1.19, I2 = 61%) [parent ratings] and 0.51 (95% CI: -0.02-1.04, I2 = 72%) [other ratings], while the PUFA ESs were 0.17 (95% CI: -0.03-0.38, I2 = 38%) [parent ratings], -0.05 (95% CI: -0.27-0.18, I2 = 0%) [teacher ratings] and 0.16 (95% CI: 0.01-0.31, I2 = 0%) [parent and teacher ratings]. Three meta-analyses (two FFD and one AFC) resulted in high I2 without presenting subgroup results. The FFD meta-analyses provided sufficient data to perform subgroup analyses on intervention type, resulting in a decrease of heterogeneity to 0% (diet design) and 37.8% (challenge design). CONCLUSION Considering the small average ESs PUFA supplementation is unlikely to provide a tangible contribution to ADHD treatment, while further research is required for AFC elimination before advising this intervention as ADHD treatment. The average FFD ES is substantial, offering treatment opportunities in subgroups of children with ADHD not responding to or too young for medication. Further FFD research should focus on establishing the underlying mechanisms of food (e.g. incrimination of gut microbiota) to simplify the FFD approach in children with ADHD.
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The development of sweet taste: From biology to hedonics.
Mennella, JA, Bobowski, NK, Reed, DR
Reviews in endocrine & metabolic disorders. 2016;(2):171-8
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From the age of 2 years, an American child is more likely to consume a sugar-sweetened product than a fruit or vegetable on any given day-a troubling statistic, given that food preferences are established early in childhood, as well as the strong association between this dietary pattern and increased risk of developing a number of chronic diseases. Here, we review the ontogeny and biopsychology of sweet taste, highlighting how a biological drive to prefer sweetness at high concentrations during childhood, which would have conferred an advantage in environments of scarcity, now predisposes children to overconsume all that is sweet in a modern food system replete with added sugars. We review the power of sweet taste to blunt expressions of pain and mask bad tastes in foods as well as factors that predispose some to consume high-sugar diets, including experiential learning and taste preferences driven in part by genetics. Understanding children's unique vulnerability to our current food environment, rich in both nutritive and nonnutritive sweeteners, is highlighted as a priority for future research to develop evidence-based strategies to help establish healthy dietary behaviors early in life.
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Association of Picky Eating and Food Neophobia with Weight: A Systematic Review.
Brown, CL, Vander Schaaf, EB, Cohen, GM, Irby, MB, Skelton, JA
Childhood obesity (Print). 2016;(4):247-62
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BACKGROUND Picky eating and food neophobia are common during childhood. Childhood eating behaviors are often predictive of adult eating behaviors. OBJECTIVES Determine if childhood picky eating or food neophobia is associated with childhood weight status, or with becoming underweight, overweight, or obese later in childhood. DATA SOURCES We identified relevant studies from searches of PubMed, PsycINFO, and NEOHAL, as well as citations from identified studies. Study Eligibility Criteria and Participants: Inclusion criteria were original research articles examining a relationship between picky eating and/or food neophobia with childhood weight status. We summarized definitions and prevalence of picky eating or food neophobia and association with weight status. STUDY APPRAISAL Two independent investigators assessed bias and confounding using the Agency for Healthcare Research and Quality's RTI Item Bank. RESULTS Forty-one studies met inclusion criteria. Picky eating was defined inconsistently, and a large variation in prevalence was found (5.8%-59%). Food neophobia was consistently defined as an unwillingness to try new foods, with a prevalence between 40% and 60%. No association existed between childhood weight status and food neophobia, and results were unclear for picky eating. LIMITATIONS Risk of bias and confounding were moderate. Parental report was commonly used to assess picky eating, height, and weight and parental weight, feeding styles, and community characteristics were infrequently considered. CONCLUSIONS AND IMPLICATIONS Heterogeneous definitions used for picky eating led to a wide range of reported prevalence and an unclear relationship with weight. Consistent definitions and an improved understanding of such a relationship could help clinicians provide appropriate anticipatory guidance.
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Perinatal and Childhood Exposure to Cadmium, Manganese, and Metal Mixtures and Effects on Cognition and Behavior: A Review of Recent Literature.
Sanders, AP, Claus Henn, B, Wright, RO
Current environmental health reports. 2015;(3):284-94
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Lead (Pb) and mercury (Hg) neurotoxicity is well established. In recent years, a growing body of evidence suggests that environmental exposure to other metals including arsenic (As), cadmium (Cd), and manganese (Mn) and their mixtures also poses public health threats. In this paper, we summarize the recent literature examining the relationship of prenatal and childhood environmental metal exposures with cognitive and behavioral outcomes in children. We conducted a literature search to identify epidemiologic studies that examined the relationship of Cd, Mn, and metal mixtures with children's neurodevelopmental/cognitive and behavioral outcomes. We restricted the search to peer-reviewed studies published in English between January 2009 and March 2015. We identified a total of 31 articles of which 16, 17, and 16 studies examined the effects of Cd, Mn, or metal mixtures, respectively. Based on our review, there is suggestive evidence that prenatal/childhood Cd exposure may be associated with poorer cognition, but additional research is clearly needed. We found little evidence of behavioral effects of early life Cd exposure, and no studies found a significant relationship with attention deficit hyperactivity disorder. Studies of early life Mn exposure consistently reported negative impacts on both cognition and behavior. There is also growing evidence that co-exposure to multiple metals can result in increased neurotoxicity compared to single-metal exposure, in particular during early life. Few studies have evaluated behavioral effects related to metal co-exposure.
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The Effect of Directed Medical Play on Young Children's Pain and Distress During Burn Wound Care.
Moore, ER, Bennett, KL, Dietrich, MS, Wells, N
Journal of pediatric health care : official publication of National Association of Pediatric Nurse Associates & Practitioners. 2015;(3):265-73
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Directed medical play is used to reduce children's pain and distress during medical treatment. In this pilot study, young children who attended the burn clinic received either directed medical play provided by a child life specialist or standard preparation from the burn clinic nurse to prepare for their first dressing change. Data were collected using validated instruments. Children who participated in medical play experienced less distress during their dressing change (M = 0.5, n = 12) than did those receiving standard preparation (M = 2.0, n = 9). Children who received standard care reported a 2-point increase in pain during the procedure, whereas children who participated in medical play reported a 1-point increase. Change in parental anxiety was similar for both groups. Parent satisfaction was higher for caregivers who observed medical play than standard preparation. Although all findings were in the hypothesized direction, none was statically significant, most likely because of the small sample size.
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[THE ROLE OF MATERNAL DIET IN METABOLIC AND BEHAVIOURAL PROGRAMMING: REVIEW OF BIOLOGIC MECHANISMS INVOLVED].
Ramírez-López, MT, Vázquez Berrios, M, Arco González, R, Blanco Velilla, RN, Decara Del Olmo, J, Suárez Pérez, J, Rodríguez de Fonseca, F, Gómez de Heras, R
Nutricion hospitalaria. 2015;(6):2433-45
Abstract
Over the last few years, a considerable amount of studies have focused on the effect of undernutrition and overnutrition during critical periods of offspring development and their risk of developing metabolic diseases later in life. Additionally, inadequate maternal diets have been involved in the malprogramming of brain functions and some behaviours. Several mechanisms have been associated with the process of malprogramming such as epigenetics modifications, excessive oxidative stress or hypothalamic alterations. This evidence supports the idea that nutritional prevention strategies must be considered for offspring during early development stages that include the preconceptional period. Additionally, studying involved mechanisms could be particularly useful in the search of efficient therapies against malprogramming.