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To assess changes in sleep parameters and circadian rhythm metrics measured by actigraphy in preschool-aged children.Longitudinal analysis over 1 year.Ninety-four children living in Tijuana and Ensenada, Mexico.Children wore accelerometers on the right hip for one continuous week at baseline and 1-year follow-up. Parents recorded child bedtime, waketime, and naps in sleep diaries. We used cosinor and nonparametric approaches to calculate circadian rhythm metrics.At baseline, children had a mean age of 4.2 years, and 51.1% were girls. In multivariable models adjusted for age, gender, BMI category, parental education, household income and city, at follow-up children had significantly earlier waketimes (β = -7.99 minutes, p.001) compared to baseline. Children also had lower sleep onset latency (β = -2.32 minutes, p = .057), and longer nighttime sleep (β = 9.38 minutes, p = .079), but these changes were not significant at the α0.05 level. We found significant increases in log relative amplitude (β = 0.017, p = .009), and decreases in log midline estimated statistic of rhythm (β = -0.084, p = .017) and log of the least active 5-hour period (β = -0.057, p = .010). When we adjusted for co-sleeping, we found significant decreases in the number of nighttime awakenings (β = -1.29, p = .011) but otherwise similar results. There were no other changes in sleep parameters or circadian rhythm metrics.Mean increases in nighttime sleep and earlier wake times over one year were concomitant with decreases in overall activity levels and increases in circadian rhythm robustness. Co-sleeping was a predictor of sleep disturbances. This study provides longitudinal evidence regarding changes in sleep and circadian metrics in a sample of children from an under-researched sociodemographic group during an important, early life period.

Background Rates of childhood obesity have accelerated rapidly over the past decade in low- and middle-income countries and in Latin America in particular. At the same time, Latinx children in high-income countries have been disproportionately affected by obesity. Public health and medical experts have called for greater focus on multi-sector approaches to obesity prevention, including policy, systems, and environmental strategies, but current evidence for effective intervention strategies among Latinx children is lacking. Several systematic reviews have investigated obesity prevention interventions in Latinx children in the United States and in Latin America, including our own review, but these are now a decade old. Thus, an updated review of existing interventions is needed. To address this gap, we will conduct a systematic review and summary of interventions for obesity prevention among Latinx children published over the past 10 years. The objective of this paper is to outline the protocol for conducting the systematic review and possible meta-analysis. Methods We will conduct a literature search using PubMed, ERIC, PsycINFO, Scopus, Scientific Electronic Library Online, and Google Scholar databases for studies of interventions to prevent obesity in Latinx children ages birth to 18 years of age. To meet our definition of an intervention, we will include study designs that evaluate the either the efficacy or effectiveness of obesity prevention interventions, including randomized controlled trials, quasi-experimental studies, and non-randomized interventions with a control or comparison group. We will exclude interventions that aimed to treat rather than prevent overweight or obesity. Interventions may take place in any country or setting. The primary outcome of interest will be child overweight or obesity, measured as adiposity, body mass, or similar anthropometric measures. We will assess risk of bias of included studies using the Cochrane risk of bias tool for randomized and non-randomized studies, as appropriate. We may conduct meta-analyses if studies with comparable exposure and outcome variables are available. Discussion This protocol paper establishes a methodology for a future systemic review of obesity prevention interventions in Latinx children. A systematic review of this topic will provide an important update to the literature regarding interventions to prevent obesity in Latinx child populations globally over the past decade. Review results will be relevant to stakeholders across multiple sectors engaged in childhood obesity prevention among Latinx children. Systematic review registration PROSPERO CRD42020161339

The objective of this study was to inform consumer-facing dietary guidance by (1) adapting the current University of North Carolina at Chapel Hill (UNC) food processing framework to include a home processing (HP) component and (2) pilot testing the adapted version using a nationally representative sample of foods consumed in the U.S. The UNC framework was adapted to include guidelines for categorizing home-prepared (HP) foods. The original UNC and adapted HP frameworks were used to code dietary recalls from a random sample of National Health and Nutrition Examination Survey (2015&ndash, 2016 cycle) participants (n = 100, ages 2&ndash, 80 years). Percent changes between the UNC and HP adapted frameworks for each processing category were calculated using Microsoft Excel, version 16.23. Participants were 56% female, 35% non-Hispanic white (mean age = 31.3 &plusmn, 23.8). There were 1,376 foods with 651 unique foods reported. Using the HP compared to the UNC framework, unprocessed/minimally processed foods declined by 11.7% (UNC: 31.0% vs. HP: 27.4%), basic processed foods increased by 116.8% (UNC: 8.2% vs. HP: 17.8%), moderately processed foods increased by 16.3% (UNC: 14.2% vs. HP: 16.6%), and highly processed foods decreased by 17.8% (UNC: 46.5% vs. HP: 38.2%). Home-prepared foods should be considered as distinct from industrially produced foods when coding dietary data by processing category. This has implications for consumer-facing dietary guidance that incorporates processing level as an indicator of diet quality.

Background Increasing consumption of highly processed foods has been associated with adverse health outcomes among children. In the US, children consume up to half of their daily energy intake at school. Objectives We sought to characterize foods that children bring from home to school according to processing level and to evaluate the effectiveness of a school-based intervention, Great Taste Less Waste (GTLW), in reducing the proportion of energy brought from highly processed foods from home compared with control. Design Secondary data analysis of a 7-month school-based, cluster-randomized trial. Participants/setting Third- and fourth-grade students (n = 502, mean age: 9.0 ± 0.62 years) at 10 public elementary schools in Eastern Massachusetts (school year 2012-2013). Intervention GTLW included a 22-lesson classroom curriculum, homework activities, monthly parent newsletters, a food shopping and packing guide for parents, food demonstrations, school-wide announcements, and a poster contest. Main outcome measures The energy content of foods brought to school was estimated from digital photographs, and foods were assigned to 1 of 3 processing levels (less processed or unprocessed, moderately processed, or highly processed) based on an established classification system. Statistical analyses performed The percentage of energy brought from foods categorized into each processing level was calculated and compared pre- and postintervention using hierarchical linear models. Results Most of the food brought from home to school was highly processed (70% of food energy brought). Foods categorized as snack foods and desserts contributed the greatest percentage of total energy to the highly processed category at baseline and follow-up (72% and 69%, respectively). Energy from foods brought for snack tended to be more highly processed than those brought for lunch. No significant differences were observed from pre- to postintervention in the GTLW group compared with control for the percentage of energy brought from highly processed foods in adjusted models (β: −1.1, standard error: 2.2, P = .6) or any other processing level. Conclusions Highly processed foods were prevalent in home-packed lunches and snacks, and these patterns persisted after a targeted intervention. Further research is needed to identify strategies to improve the healthfulness of foods brought from home to school.

Objective:To determine how children interpret terms related to food processing; whether their categorisation of foods according to processing level is consistent with those used in research; and whether they associate the degree of processing with healthfulness.Design:Qualitative data were collected from ten focus groups. Focus groups were audio-recorded, transcribed verbatim, and thematic analysis was conducted.Setting:Four elementary and afterschool programmes in a large, urban school district in the USA that served predominantly low-income, racial/ethnic minority students.Participants:Children, 9–12 years old, in the fourth–sixth grades (n 53).Results:The sample was 40 % male, 47 % Hispanic with a mean age of 10·4 ± 1·1 years. Children’s understanding of unprocessed foods was well aligned with research classifications, while concordance of highly processed foods with research categorisations varied. Five primary themes regarding the way children categorised foods according to their processing level emerged: type and amount of added ingredients; preparation method; packaging and storage; change in physical state or sensory experience; and growing method. Most children associated processing level with healthfulness, describing unprocessed foods as healthier. The most common reason provided for the unhealthfulness of processed foods was added ingredients, including ‘chemicals’ and ‘sugar’.Conclusions:The current study demonstrated that children have a working knowledge of processing that could be leveraged to encourage healthier eating patterns; however, their understanding is not always consistent with the classification systems used in research. The vocabulary used by researchers and consumers to talk about processing must be reconciled to translate findings into actionable messages.

Excess consumption of highly processed foods may be associated with lower diet quality and obesity prevalence, but few studies have examined these relationships in children from low-income households. Therefore, the objective of this study was to evaluate the relationship between food consumption by processing category, diet quality as measured by the Healthy Eating Index-2015 (HEI-2015) and body mass index (BMI) in a sample of low-income children. Data from a study assessing the impact of Summer Food Service participation on diet quality and weight status (N = 131) was used to conduct a cross-sectional analysis of children aged six to twelve years from low-income communities in the Northeastern U.S. Total HEI-2015 score and percentage of calories consumed by processing level were computed per day from three 24-h diet recalls. Multivariable linear regression was used to assess the relationship between percentage of calories from foods by processing category (unprocessed and minimally, basic, moderately and highly processed), HEI-2015 and BMI-z score. The final sample was 58% male and 33.8% obese. On average, children consumed 39.8 ± 17.2% of calories from highly processed foods. A 10% increase in calories consumed from highly processed foods was associated with a 2.0 point decrease in total HEI-2015 score [95% CI (−2.7, −1.2)], and a 10% increase in calories from minimally processed foods was associated with a 3.0 increase in HEI-2015 score [95% CI (2.1, 3.8)]. Relationships between processing level and BMI-z score were not significant. Among this sample of low-income children, greater intake of highly processed foods was associated with lower dietary quality, but not weight status. Future research should explore prospective associations between food consumption by processing category and weight status in children.

Background. Parent-aimed guidance on the topic of processed foods may help limit highly processed foods in children’s diets, but little is known about parent understanding and perceptions of these products. Aims. To determine how parent perceptions of processing align with processing classification systems used in research, and to identify opportunities for future research in communicating information about processed foods. Method. Six focus groups with lower income, racial/ethnic minority and immigrant parents of fourth to sixth graders ( n = 37) were conducted. Parents were asked to discuss their views on terminology related to food processing, classification of foods according to their processing level, the healthfulness of select foods, and criteria for choosing snacks for their children. Focus groups were guided by a thematic approach. NVivo 12 (QSR International) was used to facilitate analyses. Results. Thirty mothers and seven fathers participated. Two thirds (62%) were foreign-born; 38% identified as Hispanic. The term “processing” lacked consistent meaning among parents, with variation by immigrant status. Participants associated highly processed foods with convenience, packaging, and added ingredients; “less-processed” versions of foods (e.g., fresh; homemade) were perceived as healthier. Children’s preferences were the main criteria for choosing snacks. Foreign-born parents were more likely to associate processed foods with positive characteristics (e.g., properly cooked). Conclusion. The concept of food processing is an area of misconception among parents, providing an opportunity for education that may be extended to larger audiences. A universally accepted definition of food classification by processing level is necessary to effectively communicate the link between processing and healthfulness.

Discrepancies exist among food processing classification systems and in the relationship between processed food intake and dietary quality of children. This study compared inter-rater reliability, food processing category, and the relationship between processing category and nutrient concentration among three systems (Nova, International Food Information Council (IFIC), and University of North Carolina at Chapel Hill (UNC)). Processing categories for the top 100 most commonly consumed foods children consume (NHANES 2013&ndash, 2014) were independently coded and compared using Spearman&rsquo, s rank correlation coefficient. Relative ability of nutrient concentration to predict processing category was investigated using linear discriminant analysis and multinomial logistic regression and compared between systems using Cohen&rsquo, s kappa coefficient. UNC had the highest inter-rater reliability (&rho, = 0.97), followed by IFIC (&rho, = 0.78) and Nova (&rho, = 0.76). UNC and Nova had the highest agreement (80%). Lower potassium was predictive of IFIC&rsquo, s classification of foods as moderately compared to minimally processed (p = 0.01), lower vitamin D was predictive of UNC&rsquo, s classification of foods as highly compared to minimally processed (p = 0.04). Sodium and added sugars were predictive of all systems&rsquo, classification of highly compared to minimally processed foods (p &lt, 0.05). Current classification systems may not sufficiently identify foods with high nutrient quality commonly consumed by children in the U.S.

OBJECTIVES: Processed foods are associated with energy-dense eating patterns among children, yet research using food processing classification systems has led to varying conclusions regarding the impact of processed foods on dietary quality. This study utilized three common classification systems to examine (a) agreement between systems for processing level assignment, and (b) relationships between processing level, as determined by each classification system, and individual nutrient concentrations for foods commonly consumed by children. METHODS: The Nova, International Food Information Council (IFIC), and the University of North Carolina (UNC) systems were examined. Two researchers independently coded processing level according to each system's criteria for the 100 most commonly consumed foods by children 6–12 yrs (NHANES 2013–2014). Inter-rater reliability was assessed using Spearman's rank correlation. Concentration of under- (potassium, fiber, choline, magnesium, calcium, iron, vitamins A, D, E, and C) and over-consumed (added sugars, saturated fat and sodium) nutrients were quantified for 100 grams of each food. Alignment of processing classification systems with nutrient concentration was investigated using linear discriminant analysis and multinomial logistic regression, and compared among systems using Cohen's kappa. RESULTS: Most foods were classified as highly processed (70%, 62% 53%, for the Nova, UNC and IFIC system, respectively). The UNC system had the highest inter-rater reliability (r = 0.97, P

Background: Although there are several valid and reliable dietary screeners to measure child intake patterns, there is a paucity of brief assessment tools targeting under- and overconsumed foods. Objective: To compare the Fueling Learning through Exercise study (FLEX) dietary questionnaire, a screener designed to assess consumption patterns in third to fifth graders, to a validated dietary assessment tool. Methods: The FLEX dietary questionnaire was developed to assess fruit, vegetable, snack, and beverage consumption and was compared to the Block Kids Food Screener (BKFS). Correlations were analyzed using Pearson correlation coefficient. Agreement was assessed using Bland-Altman plots. Results: The sample (n = 63) had mean age of 9.9 years (SD 0.7). Most participants were non-Hispanic white (70%) and eligible for free/reduced price lunch (57%). Correlations between food group categories were significant for all groups ( P < .05) except fruits ( r = 0.51) and sugar-sweetened beverages (SSBs) ( r = 0.21). We found moderate-to-strong correlations between reported vegetable, salty snack, sweet snack, total beverage, milk, and fruit juice consumption (0.62, 0.59, 0.69, 0.47, 0.48, and 0.46, respectively). The FLEX screener reported systematically higher mean servings per day (0.24-1.1) compared to the BKFS (0.05-0.51). Conclusion: Based on these correlations, the FLEX dietary questionnaire performs similarly to a validated tool in assessing intake of under- and overconsumed food groups in a diverse third to fifth grade population. Overall serving size discrepancies are likely due to more relevant food items on the FLEX questionnaire and a more child-friendly format. This study highlights the need to update older diet screeners to reflect current child consumption patterns.

Nutrition plays an important role in proper physical and cognitive functioning. However, there is limited evidence on the relationship between overall diet, cognition, and academic success in children, particularly among low-income and diverse groups. The objective of this study was to examine the relationships between healthful versus less healthful food group intake, cognitive performance, and academic achievement in a diverse sample of schoolchildren. 868 urban schoolchildren (age 8 to 10 years) participated in the study. Intake of healthful (fruits, vegetables, unsweetened beverages) and less healthful (sweet and salty snacks, sugar-sweetened beverages) food groups was determined via a food frequency questionnaire. Digit Span and Stroop test scores were used to assess cognitive performance. Academic achievement was assessed via standardized test scores. Multiple Poisson and multiple linear regression were used to test the associations between diet and cognitive scores. Multiple ordered logistic regression was used to assess the associations between diet and academic achievement. Potential confounders (age, sex, body mass index (BMI) z-score, race/ethnicity, English language learner status, individualized education plan enrollment, physical activity, and parent education level) were tested for inclusion in all models. The sample included 868 children (56.7% girls, 33.2% non-Hispanic white, 26.2% Hispanic, 17.1% multiracial/other, 8.3% non-Hispanic black, 40.5% overweight/obese). The most frequently consumed foods were fruits and sweet snacks (1.9 and 1.6 servings per day, respectively). There were no statistically significant associations between diet and cognitive test scores. Greater intake of less healthful food groups (sweet snacks, salty snacks, and sweetened beverages) was associated with lower math (OR = 0.91, CI [0.84, 0.98], p = 0.014) and English standardized test scores (OR = 0.87, CI [0.80, 0.94, p = 0.001). Greater intake of sweet snacks and fruits was associated with lower English scores (OR = 0.72, 95% CI [0.59, 0.88] p = 0.001, and OR = 0.75, 95% CI [0.72, 0.94] p = 0.003, respectively). Consumption of less healthful food groups was associated with poorer academic achievement. Further research may shed light on unexpected associations between fruit consumption and achievement. Policies targeting multiple dietary components may positively influence child academic achievement and development.