Age-related differences in eating location, food source location, and timing of snack intake among U.S. children 1-19 years.

BACKGROUND: Snacking is nearly universal and contributes significant energy to U.S. children's diets. Little is known, however, about where and when snacking intake occurs and if such patterns change with age. This research evaluated age-related differences in eating location, food source location, and timing of snacking among U.S. children aged 1-19 years (y). METHODS: A cross-sectional analysis of snacking among 14,666 children in the 2007-2018 U.S. National Health and Nutrition Examination Survey was conducted using a single 24-hour dietary recall. Snacking was participant-defined and included all eating occasions outside of meals. Linear regression and analysis of covariance were used to examine the effects of age (toddler 1-2 y, preschooler 3-5 y, school-age 6-11 y, adolescent 12-19 y) on the percentage of daily snack energy consumed by eating location (at home vs. away from home), food source location (grocery store, convenience store, school/childcare, restaurant, from someone else (i.e. "socially"), and other), and time of day (morning, 6am-12pm; early afternoon, 12pm-3pm; late afternoon/afterschool 3pm-6pm; evening 6pm-9pm, late-night 9pm-12am, and overnight 12am-6am). RESULTS: On average, U.S. children consumed most of their daily snacking energy at home (71%), from foods and beverages obtained from grocery stores (75%), and in the late afternoon/afterschool (31%). Toddlers and preschoolers consumed a greater percentage of their daily snack energy during the morning hours compared to school-age children and adolescents (both p < 0.001); school-age children consumed the most in the evening (27%, p < 0.001), and adolescents consumed the most in the late-night period (22%, p < 0.001). Age-related increases were seen in the percentage of daily snacking energy eaten outside the home (p < 0.001), and obtained socially (p < 0.001), from restaurants (p < 0.001), and convenience stores (p < 0.001). CONCLUSION: Findings reveal age-related differences in eating location, food source location, and timing of snack intake among U.S. children aged 1-19 y. Younger children consume a greater percentage of snacking calories in the morning and at home relative to older children. School-age children and adolescents show greater snacking in the evening and at night and from foods obtained and eaten outside the home. Efforts to promote healthy snacking behaviors among children should consider developmental differences in snacking patterns.

Snack frequency, size, and energy density are associated with diet quality among US adolescents.

OBJECTIVE: To evaluate snacking and diet quality among US adolescents. DESIGN: Cross-sectional analysis examined snack frequency (snacks/day), size (kcal/snack) and energy density (kcal/g/snack) as predictors of diet quality using the mean of two 24-h dietary recalls. Diet quality was assessed using the Healthy Eating Index (HEI-2015, 0-100), a mean adequacy ratio (MAR, 0-100) for under-consumed nutrients (potassium, fibre, Ca, vitamin D) and mean percentage of recommended limits for over-consumed nutrients (added sugar, saturated fat, Na). Linear regression models examined total snacks, food only snacks and beverage only snacks, as predictors of diet quality adjusting for demographic characteristics and estimated energy reporting accuracy. SETTING: 2007-2018 National Health and Nutrition Examination Survey. PARTICIPANTS: Adolescents 12-19 years (n 4985). RESULTS: Snack frequency was associated with higher HEI-2015 (ß = 0·7 (0·3), P < 0·05) but also with higher intake of over-consumed nutrients (ß = 3·0 (0·8), P ≤ 0·001). Snack size was associated with lower HEI (ß = -0·005 (0·001), P ≤ 0·001) and MAR (ß = -0·005 (0·002), P < 0·05) and higher intake of over-consumed nutrients (ß = 0·03 (0·005), P ≤ 0·001). Associations differed for food only and beverage only snacks. Food only snack frequency was associated with higher HEI-2015 (ß = 1·7 (0·03), P ≤ 0·001), while food only snack size (ß = -0·006 (0·0009), P ≤ 0·001) and food only snack energy density (ß = -1·1 (0·2), P ≤ 0·001) were associated with lower HEI-2015. Conversely, beverage only snack frequency (ß = 4·4 (2·1) P < 0·05) and beverage only snack size (ß = 0·03 (0·01), P ≤ 0·001) were associated with higher intake of over-consumed nutrients. CONCLUSIONS: Smaller, frequent, less energy-dense food only snacks are associated with higher diet quality in adolescents; beverages consumed as snacks are associated with greater intake of over-consumed nutrients.

The early effects of cumulative and individual adverse childhood experiences on child diet: Examining the role of socioeconomic status.

Adverse Childhood Experiences (ACEs) have been associated with detrimental long-term health outcomes, including obesity risk. Existing research has yet to examine whether early life ACEs are associated with diet in early childhood within socioeconomic subgroups. Data were drawn from the Early Childhood Longitudinal Study-Birth Cohort (2001-2002). Mother-child dyads (n = 7000) were recruited when children were 9-months old, and followed longitudinally at 2 years, and 4 years. Mothers reported children's exposure to five ACEs at 9-months and 2 years and children's daily intake of fruits, vegetables, sweet snacks, and sugar-sweetened beverages (SSBs) at 4 years. Weighted multiple linear regression models tested the effect of cumulative and individual ACEs on child diet in full, low-, and high-SES samples. Cumulative ACE score was inversely associated with frequency of fruit intake in full (b = -0.08, p = 0.005) and low-SES samples (b = -0.10, p < 0.001). Domestic violence was associated with less frequent fruit intake in full (b = -0.21, p = 0.01) and low-SES samples (b = -0.29 p = 0.008). In the full sample, incarceration was associated with less frequent fruit intake (b = -0.24, p = 0.02), and domestic violence was associated with higher sweet snack (b = 0.22, p = 0.01) and SSB intake (b = 0.27, p = 0.009). Results provide preliminary evidence on the association between cumulative and specific ACEs and child diet, and how this relationship varies by SES context. Future research is needed to understand the complex multi-level mechanisms operating along this pathway in order to inform interventions supporting behavior change and to build evidence for policies that may reduce diet-related disparities in ACE exposure.

Cluster randomized controlled trial of a mobile market intervention to increase fruit and vegetable intake among adults in lower-income communities in North Carolina.

BACKGROUND: Poorer diets and subsequent higher rates of chronic disease among lower-income individuals may be partially attributed to reduced access to fresh fruits and vegetables (F&V) and other healthy foods. Mobile markets are an increasingly popular method for providing access to F&V in underserved communities, but evaluation efforts are limited. The purpose of this study was to determine the impact of Veggie Van (VV), a mobile produce market, on F&V intake in lower-income communities using a group randomized controlled trial. METHODS: VV is a mobile produce market that sells reduced-cost locally grown produce and offers nutrition and cooking education. We recruited 12 sites in lower-income communities in North Carolina (USA) to host VV, randomizing them to receive VV immediately (intervention) or after the 6-month study period (delayed intervention control). Participants at each site completed baseline and follow-up surveys including F&V intake, perceived access to fresh F&V and self-efficacy for purchasing, preparing and eating F&V. We used multiple linear regression to calculate adjusted differences in outcomes while controlling for baseline values, education and clustering within site. RESULTS: Among 142 participants who completed the follow-up, baseline F&V intake was 3.48 cups/day for control and 3.33 for intervention. At follow-up, adjusted change in F&V consumption was 0.95 cups/day greater for intervention participants (p = 0.005), but was attenuated to 0.51 cups per day (p = 0.11) after removing extreme values. VV customers increased their F&V consumption by 0.41 cups/day (n = 30) compared to a 0.25 cups/day decrease for 111 non-customers (p = 0.04). Intervention participants did not show significant improvements in perceived access to fresh F&V, but increased their self-efficacy for working more F&V into snacks (p = 0.02), making up a vegetable dish with what they had on hand (p = 0.03), and cooking vegetables in a way that is appealing to their family (p = 0.048). CONCLUSIONS: Mobile markets may help improve F&V intake in lower-income communities. TRIAL REGISTRATION: Clinicaltrials.gov ID# NCT03026608 retrospectively registered January 2, 2017.

Confirmatory Factor Analysis of Sizing Me Up: Validation of an Obesity-Specific Health-Related Quality of Life Measure in Latino Youth.

Objectives: This study aims to validate an obesity-specific health-related quality of life (HRQOL) measure, Sizing Me Up (SMU), in treatment-seeking Latino youth. Pediatric obesity has been associated with reduced HRQOL; therefore, valid measures are important for use in diverse populations that may be at increased risk for obesity and related comorbidities. Methods: Structural equation modeling tested the fit of the 5-subscale, 22-item SMU measure in Latino youth, 5-13 years of age, with obesity ( N = 204). Invariance testing was conducted to examine equivalence between Latino and non-Latino groups ( N = 250). Results: SMU achieved acceptable fit in a Latino population [χ 2 = 428.33, df = 199, p < .001, Root Mean Squared Error of Approximation = 0.072 (0.062-0.082), Comparative Fit Index = 0.915, Tucker-Lewis Index = 0.901, Weighted Root Mean Square Residual = 1.2230]. Additionally, factor structure and factor loadings were invariant across Latino and non-Latino groups, but thresholds were not invariant. Conclusions: SMU is a valid measure of obesity-specific HRQOL in treatment-seeking Latino youth with obesity.

Recruiting Community Partners for Veggie Van: Strategies and Lessons Learned From a Mobile Market Intervention in North Carolina, 2012-2015.

BACKGROUND: Food access interventions are promising strategies for improving dietary intake, which is associated with better health. However, studies examining the relationship between food access and intake are limited to observational designs, indicating a need for more rigorous approaches. The Veggie Van (VV) program was a cluster-randomized intervention designed to address the gap between food access and intake. In this article, we aim to describe the approaches involved in recruiting community partners to participate in VV. COMMUNITY CONTEXT: The VV mobile market aimed to improve access to fresh fruits and vegetables by providing subsidized, high-quality, local produce in low-resource communities in North Carolina. This study describes the strategies and considerations involved in recruiting community partners and individual participants for participation in the VV program and evaluation. METHODS: To recruit partners, we used various strategies, including a site screener to identify potential partners, interest forms to gauge future VV use and prioritize enrollment of a high-need population, marketing materials to promote VV, site liaisons to coordinate community outreach, and a memorandum of understanding between all invested parties. OUTCOME: A total of 53 community organizations and 725 participants were approached for recruitment. Ultimately, 12 sites and 201 participants were enrolled. Enrollment took 38 months, but our approaches helped successfully recruit a low-income, low-access population. The process took longer than anticipated, and funding constraints prevented certain strategies from being implemented. INTERPRETATION: Recruiting community partners and members for participation in a multi-level, community-based intervention was challenging. Strategies and lessons learned can inform future studies.

An implementation evaluation of a sports-based health intervention for underrepresented middle school youth in Philadelphia.

Multicomponent, community-based programs aiming to improve health behaviors in youth are needed but can be challenging to implement. Research is needed to better understand the factors that facilitate and inhibit effective implementation of these programs especially for youth at increased risk of health disparities. This study aimed to identify and explore the implementation determinants and outcomes of a multicomponent health intervention conducted from 2021 to 2022 for middle school students living in underserved communities in Philadelphia, PA, USA. Mixed methods approaches, including self-report surveys and semi-structured qualitative interviews, were administered to 18 members of the implementation staff at the end of the program, including coaches (n = 7), assistant coaches (n = 2), school champions (n = 6), administrative leaders (n = 2), and a school district administrator (n = 1). Survey and interview questions were guided by the Consolidated Framework for Implementation Research (CFIR), and interviews were thematically coded following transcription based on 26 CFIR constructs. Innovation source, evidence strength and quality, cosmopolitanism, and the personal attributes of individuals were key constructs associated with implementation effectiveness. Data revealed three multidimensional themes that highlighted broader challenges influencing implementation: (i) broad consensus, different interpretations, (ii) staffing challenges, and (iii) continuity is key. The need for the program was clearly recognized and overall belief in the purpose of the intervention was strong among key program staff and administration. However, issues including limited engagement with training, staffing turnover, and the rotational programming design hindered implementation. Future projects aiming to implement multicomponent after-school time interventions must ensure a consistent vision among partners and continuity in program delivery.

There is a pressing need for effective interventions to improve health behaviors in youth and schools are ideal settings for this work. The needs are even greater in underresourced school settings where youth have limited access to sports and physical activity. However, implementing multicomponent sports-based programs can be challenging and this leads to inconsistencies in program delivery and effectiveness. Therefore, understanding the factors that support or inhibit program implementation in schools is of great public health importance. This study aimed to evaluate the factors impacting the implementation of an after-school sport-based intervention for youth at five middle schools in Philadelphia, PA, USA. Interviews and surveys were conducted with all programming staff at the end of the program, guided by the Consolidated Framework for Implementation Research (CFIR). Program staff highlighted the need for and importance of the program, but also identified that staffing and training, variability in approaches used, and a lack of consistent support for students were key issues that affected program success. Future programs should focus efforts and resources on hiring and training staff and providing support and consistency for youth to improve the implementation of these important programs in school settings.

The Carbon Stable Isotope Ratio as an Objective Biomarker of Added Sugar Intake: A Scoping Review of Current Evidence in Human Nutrition.

Objective biomarkers of dietary intake are needed to advance nutrition research. The carbon stable isotope ratio (C13/C12; CIR) holds promise as an objective biomarker of added sugar (AS) and sugar-sweetened beverage (SSB) intake. This systematic scoping review presents the current evidence on CIRs from human studies. Search results (through April 12, 2024) yielded 6297 studies and 24 final articles. Studies were observational (n = 12), controlled feeding (n = 10), or dietary interventions (n = 2). CIRs were sampled from blood (n = 23), hair (n = 5), breath (n = 2), and/or adipose tissue (n = 1). Most (n = 17) conducted whole tissue (that is, bulk) analysis, 8 used compound specific isotope analysis (CSIA), and/or 2 studies used methods appropriate for analyzing breath. Studies were conducted in 3 concentrated geographic regions of the United States (n = 7 Virginia; n = 5 Arizona; n = 4 Alaska), with only 2 studies conducted in other countries. Studies that used CSIA to examine the CIR from the nonessential amino acid alanine (CIR-Ala; n = 4) and CIR analyzed from breath (n = 2) provided the most robust evidence for CIR as an objective biomarker of AS and SSBs (R2 range 0.36-0.91). Studies using bulk analysis of hair or blood showed positive, but modest and more variable associations with AS and SSBs (R2 range 0.05-0.48). Few studies showed no association, particularly in non-United States populations and those with low AS and SSB intakes. Two studies provided evidence for CIR to detect changes in SSB intake in response to dietary interventions. Overall, the most compelling evidence supports CIR-Ala as an objective indicator of AS intake and breath CIR as an indicator of short-term AS intake. Considering how to adjust for underlying dietary patterns remains an important area of future work and emerging methods using breath and CSIA warrant additional investigation. More evidence is needed to refine the utility and specificity of CIRs to measure AS and SSB intake.

Assessment of Interest in a Virtual Avatar-Based Nutrition Education Program Among Youth-Serving Community Partners.

OBJECTIVE: Examine the appeal of a virtual avatar-led nutrition education program among youth-serving community partners in North Carolina. METHODS: We surveyed community partners using the Diffusion of Innovation Theory constructs of relative advantage, compatibility, and complexity. Logistic regression evaluated the appeal and likelihood of the program's future use. RESULTS: Community partners (n = 100) agreed that the program was an innovative (87%) and convenient (85%) way for youth and parents to learn about nutrition. Partners who perceived the program as a relative advantage to current programs had significantly higher odds of future use intention (P = 0.005). Those who found it compatible with organizational and personal values had significantly higher odds of future use (P < 0.001). CONCLUSIONS AND IMPLICATIONS: A nutrition education virtual avatar program is of interest to youth-engaged community partners. Future research examining the potential integration of this type of program within community organizations is warranted.

Assessment of an Online Nutrition Education Program to Improve Mealtime Practices Among Families Receiving SNAP and WIC.

PURPOSE: This study examines if participation in an online nutrition education program holds promise for improving mealtime practices in families using SNAP and WIC. DESIGN: Pre-post self-report surveys. SETTING: Digital program delivered online, nationally in the United States. SAMPLE: Two hundred fifty-seven parents receiving SNAP and/or WIC. INTERVENTION: Parents signed up to participate in Affordable Flavors, an online self-guided 30-day meal plan, developed by culturally diverse dietitians, aligned with the Dietary Guidelines, and linked with social media support. MEASURES: Overall program utilization and acceptability were assessed along with parent meal preparation practices, diet quality of meals served to children, self-efficacy, mealtime stress, grocery spending, and food insecurity. ANALYSIS: Paired t-tests (continuous variables) and McNemar's tests (categorical variables). RESULTS: Overall program utilization and acceptability were high. Participants reported improvements in meal preparation practices (t(255) = 6.6, P < .001), diet quality of meals served to children (t(245) = 4.0, P < .001), and self-efficacy (t(251) = 10.0, P < .001), and decreases in grocery spending (t(175) = -4.3, P < .001), mealtime stress (t(256) = -8.8, P < .001) and food insecurity (26.8% vs 10.9%, P < .001). CONCLUSION: Affordable Flavors is an acceptable, cost-effective, and easily disseminatable program that holds promise for improving parent self-efficacy to prepare and serve healthy meals to children and increase diet quality in families receiving SNAP and WIC. Engaging online nutrition education programs that can be used by a variety of health professionals, especially in settings where direct nutrition education services are not feasible or cost prohibitive, are needed.

Association of Snacking Frequency, Size, and Energy Density with Weight Status among Preschool-Aged Children in the United States.

BACKGROUND: Snacking (ie, eating between meals) is common among US preschool-aged children, but associations with weight status are unclear. OBJECTIVE: This research evaluated associations of snack frequency, size, and energy density as well as the percent of daily energy from snacking with weight status and sociodemographic characteristics among US children aged 2 to 5 years. DESIGN: Cross-sectional analysis of 2007-2018 National Health and Nutrition Examination Survey data using two, caregiver proxy, 24-hour dietary recalls. PARTICIPANTS/SETTING: US children aged 2 to 5 years (n = 3,313) with at least one snack occasion over 2 days of intake. MAIN OUTCOME MEASURES: Snacking parameters included frequency (number of occasions per day), size (kilocalories per occasion), and energy density (kilocalories per gram per occasion) as well as percent of daily energy from snacking. STATISTICAL ANALYSES: Generalized linear regression models evaluated associations of snacking with child weight status (ie, normal weight and overweight/obesity), adjusting for survey weights, energy misreporting, mean meal size, and sociodemographic covariates. RESULTS: Children with overweight/obesity consumed more frequent snacks (2.8 [0.06] vs 2.5 [0.03] snacks/day, respectively; P < 0.001), larger snacks (188 [4] vs 162 [23] kcal/occasion, respectively; P < 0.001), and a greater percent of daily energy from snacking (29.80% [1.00%] vs 26.09% [0.40%], respectively; P < 0.001) than children with normal weight. Mean snack frequency and size as well as percentage of daily energy from snacking varied with child age, gender, and head of household education. Associations of snacking with child race and ethnicity were less consistent. CONCLUSIONS: These nationally representative findings provide evidence that the consumption of larger, more frequent snacks is associated with overweight/obesity among US children aged 2 to 5 years and snacking varies by sociodemographic characteristics.

A digitally enhanced home-based physical activity intervention for high-risk middle school youth during COVID-19.

COVID-19 significantly impacted physical activity among high-risk youth. Camp from Home, a digitally enhanced home-based intervention, was developed to address physical activity disparities among middle school youth during COVID-19. Camp from Home enrolled 62 youth in 54 families from five schools in Philadelphia during the summer of 2020. The 6-week intervention comprised of (1) three home deliveries of "activity kits" including exercise equipment and activity booklets, (2) asynchronous sport and exercise videos posted to a private YouTube channel, and (3) supportive text-messages from health coaches. YouTube analytics and self-report surveys completed by parents and youth at baseline and at the end of programming were used to assess engagement, acceptability, and preliminary efficacy. Youth participants were 12.4 (1.2) years, 38.7% female and 90.3% Black/African American. At follow-up, 41 parents (75.9%) and 34 youth (54.8%) completed measures. Youth self-reported increases in self-efficacy (ΔM(sd) = 0.4(1.0), p = .03) and physical activity (ΔM(sd) = 4.2(7.9), p = .004), despite suboptimal engagement in digital program components. Overall, participants highly rated the program. Activity kits and text-messages from health coaches were rated as most helpful. Most parents (95.1%) and youth (83.8%) expressed interested in participating again in the future. A 6-week digitally enhanced, home-based physical activity intervention was acceptable and feasible among parents and youth during the summer of 2020, with youth reporting improvements in self-efficacy and physical activity. Summer programs are critical for reducing disparities in physical activity and hold potential for addressing key barriers for high-risk youth even outside the context of COVID-19.

More-To-Less Home Healthful Foods Ratio is Associated With Diet Quality in Preadolescents With Elevated Body Mass Index.

OBJECTIVE: To examine home food availability (HFA) and the association with diet quality in preadolescents with elevated body mass index. METHODS: A cross-sectional analysis examined HFA and diet quality (using the 2015-Health Eating Index [HEI] derived from 1 or 2 24-hour dietary recalls) among preadolescents (n = 111; aged 8-12 years; body mass index ≥ 75th percentile). A novel ratio of more-to-less healthful items was created to represent HFA. Multivariate linear regression models examined the HFA ratio and individual food and beverage groups as correlates of HEI. RESULTS: The HFA ratio was associated with higher HEI (ß = 5.3 [1.3]; P &lt; 0.001). Home food availability of sweets (ß = -2.6 [0.9]; P = 0.003) and sugar-sweetened beverages (ß = -2.3 [1.0]; P = 0.02) were associated with lower HEI. Home food availability of fruits was associated with higher HEI (ß = 1.3 [0.7]; P = 0.05). CONCLUSIONS AND IMPLICATIONS: Structuring the HFA so that more healthful choices are available relative to less healthful foods could be an effective approach for improving diet quality in preadolescents at risk for obesity.

Association of weight status with the types of foods consumed at snacking occasions among US adolescents.

OBJECTIVE: This study aimed to evaluate snack food-group composition by weight status among United States adolescents. METHODS: Cross-sectional analysis of adolescent food-group-component intake from snacking occasions using two 24-hour dietary recalls from the 2007 through 2018 National Health and Nutrition Examination Survey (NHANES; n = 5264; 12-19 years) was conducted. ANCOVA models evaluated food intakes by BMI percentile (BMI%; normal weight [NW]: <85th BMI%; overweight [OW]: 85th-95th BMI%; and obesity [OB]: ≥95th BMI%), adjusting for energy misreporting and key covariates. RESULTS: Adolescents with OB consumed greater total daily energy from snacks (mean [SE]: NW = 424 [10] kcal; OW = 527 [16] kcal; OB = 603 [22] kcal; p < 0.001) than adolescents with OW and NW. Adolescents with OW or OB consumed higher amounts of refined grains, dairy, protein, oil, solid fat, and added sugar from snacks than adolescents with NW (p < 0.05-0.001). CONCLUSIONS: Adolescents with OW or OB consume more calories and higher levels of overconsumed dietary components, i.e., added sugar, solid fats, and refined grains, from snacks than adolescents with NW. Age-specific snacking recommendations to inform dietary guidance are needed to prevent excess intake of overconsumed nutrients and calories.

Screen Time Parenting Practices and Associations with Preschool Children's TV Viewing and Weight-Related Outcomes.

The purpose of this study was to examine associations between screen time (ST) parenting practices and 2-5-year-old children's TV viewing and weight status. Data were collected from 252 parent-child dyads enrolled in a randomized parent-focused childhood obesity prevention trial from 2009-2012. ST parenting practices were assessed at baseline using a validated parent-reported survey. Parent-reported child TV viewing and objectively measured anthropometrics were assessed at baseline, post-intervention (35 weeks), and follow-up (59 weeks). Marginal effect models were developed to test the association between baseline ST parenting practices and children's TV viewing, BMI z-score, and waist circumference across all time points. Limiting/monitoring ST was associated with decreased weekly TV viewing (ß = -1.79, 95% CI: -2.61; -0.95), while exposure to TV was associated with more weekly TV viewing over 59 weeks (ß = 1.23, 95% CI: 0.71; 1.75). Greater parent use of ST as a reward was associated with increased child BMI z-score (ß = 0.15, 95% CI: 0.03; 0.27), while limiting/monitoring ST was associated with decreased BMI z-score (ß = -0.16, 95% CI: -0.30; -0.01) and smaller waist circumference (ß = -0.55, 95% CI: -1.04; -0.06) over the study period. These findings suggest that modifying parent ST practices may be an important strategy to reduce ST and promote healthy weight in young children.

Development and Preliminary Feasibility of iByte4Health: A Mobile Health (mHealth) Pediatric Obesity Prevention Intervention to Engage Parents with Low-Income of Children 2-9 Years.

This research describes the development and preliminary feasibility of iByte4Health, a mobile health (mHealth) obesity prevention intervention designed for parents with a low-income of children 2-9 years of age. Study 1 (n = 36) presents findings from formative work used to develop the program. Study 2 (n = 23) presents a 2-week proof-of-concept feasibility testing of iByte4Health, including participant acceptability, utilization, and engagement. Based on Study 1, iByte4Health was designed as a text-messaging program, targeting barriers and challenges identified by parents of young children for six key obesity prevention behaviors: (1) snacking; (2) physical activity; (3) sleep; (4) sugary drinks; (5) fruit and vegetable intake; and (6) healthy cooking at home. In Study 2, participants demonstrated high program retention (95.7% at follow-up) and acceptability (90.9% reported liking or loving the program). Users were engaged with the program; 87.0% responded to at least one self-monitoring text message; 90.9% found the videos and linked content to be helpful or extremely helpful; 86.4% found text messages helpful or extremely helpful. iByte4Health is a community-informed, evidenced-based program that holds promise for obesity prevention efforts, especially for those families at the increased risk of obesity and related disparities. Future work is warranted to test the efficacy of the program.

Virtual Avatar Coaching With Community Context for Adult-Child Dyads with Low Income.

OBJECTIVE: Examine the acceptability of an evidence-based, contextually tailored, virtual avatar coaching approach for nutrition education among adult-child dyads with low income. DESIGN: Structured observations and semistructured interviews. SETTING: Low-income communities in 2 midsized urban areas. PARTICIPANTS: Fifteen African American adult and child (aged 5-10 years old) dyads recruited from community agencies. PHENOMENON OF INTEREST: Structured observation during the use of the virtual avatar coaching program and qualitative feedback on program experience after using the program. ANALYSIS: Transcripts were independently coded by 2 trained coders. Content analysis was conducted to determine trends and patterns in responses, and salient quotes were extracted from the manuscripts. RESULTS: The program generated dialogue between the children and adults around preferences and dietary habits. Adults and children described the program as being helpful, informative, motivational, and fun. Adults and children liked that the avatar acknowledged them at a personal level, provided accountability, and was tailored to them and their environment. Children wanted the ability to customize the avatar, more gamification, and avatar demonstration of healthy behaviors. Children felt the program would improve their health behaviors and were interested in using it again. CONCLUSIONS AND IMPLICATIONS: This study highlights information that can be used to improve avatar-based programs for nutrition education with children and their adult caregivers who have low income. Future work should assess the impact of user customization experience, program impact on dietary behaviors, and resources required to scale and maintain the program with community agencies.

Examination of different definitions of snacking frequency and associations with weight status among U.S. adults.

Snacks, while widely consumed in the United States (U.S.), do not have a standard definition, complicating research to understand associations, if any, with weight status. Therefore, the purpose of this study was to examine the association between snacking frequency and weight status using various snacking definitions that exist in the scientific literature among U.S. adults (NHANES 2013-2016; ≥20y n = 9,711). Four event-based snacking definitions were operationalized including participant-defined snacks, eating events outside of meals, and operationally defined snacks based on absolute thresholds of energy consumed (>50 kcal). Weight status was examined using body mass index (BMI), waist circumference, and sagittal abdominal diameter risk. Logistic regression models examined snacking frequency and associations with weight status. Outcomes varied by the definition of a snack employed, but the majority of findings were null. Mean energy from snacks was significantly higher among women with obesity compared to women with normal weight when a snack was defined as any event outside of a typical mealtime (i.e. other than breakfast, lunch, dinner, super, brunch), regardless of whether or not it contributed ≥50 kcal. Further investigation into ingestive behaviors that may influence the relationship between snacking frequency and weight status is needed.

Associations between Snacking and Weight Status among Adolescents 12-19 Years in the United States.

Snacking is a significant contributor to energy intake among adolescents, but its association with weight status is unclear. To elucidate this association, data from 6545 adolescents (12-19 years) in the 2005-2016 National Health and Nutrition Examination Survey (NHANES) were analyzed. The mean number of daily snack occasions, mean snack size, and mean snack energy density were examined by weight classification (body mass index (BMI)-for-age percentiles: normal weight (NW) <85th; overweight (OW) ≥85th to <95th; obese (OB) ≥95th). Models included all snacking parameters, mean meal size, demographic characteristics, survey cycle year, and dietary reporting accuracy. Adolescents with NW consumed fewer snacks daily (1.69 (0.02) snacks/day) and smaller snacks per occasion (262.32 (4.41) calories (kcal)/snack) compared to adolescents with OW (1.85 (0.05) snacks/day, p = 0.005; 305.41 (8.84) kcal/snack, p < 0.001), and OB (1.97 (0.05) snacks/day; 339.60 (10.12) kcal/snack, both p < 0.001). Adolescents with OW and OB also consumed more added sugar, saturated fat and sodium from snacks, but had lower mean energy density per snack compared to snacks consumed by NW adolescents. US adolescents with OW and OB consume more snacks daily and more calories at each snacking occasion compared to adolescents with NW. Future studies should examine the prospective associations between snacking and weight status and impact on overall diet quality.

A Cluster-Randomized Trial of a Mobile Produce Market Program in 12 Communities in North Carolina: Program Development, Methods, and Baseline Characteristics.

BACKGROUND: Mobile markets are an increasingly popular method for providing access to fresh fruits and vegetables (F/V) in underserved communities; however, evaluation of these programs is limited, as are descriptions of their development, study designs, and needs of the populations they serve. OBJECTIVE: Our aim was to describe the development and theoretical basis for Veggie Van (VV), a mobile produce market intervention, the study design for the VV evaluation, and baseline characteristics of the study population. DESIGN: The protocol and sample for a cluster-randomized controlled trial with 12 sites are described. PARTICIPANTS/SETTING: Community partner organizations in the Triangle region of North Carolina that primarily served lower-income families or were located in areas that had limited access to fresh produce were recruited. Eligible individuals at each site (older than 18 years of age, self-identified as the main shoppers for their household, and expressed interest in using a mobile market) were targeted for enrollment. A total of 201 participants at 12 sites participated in the VV program and evaluation, which was implemented from November 2013 to March 2016. MAIN OUTCOME MEASURES: Change in F/V intake (cups/day), derived from self-reported responses to the National Cancer Institute F/V screener, was the main outcome measure. STATISTICAL ANALYSES PERFORMED: We performed a descriptive analysis of baseline sample characteristics. RESULTS: Mean reported F/V intake was 3.4 cups/day. Participants reported generally having some access to fresh F/V, and 57.7% agreed they could afford enough F/V to feed their family. The most frequently cited barriers were cost (55.7%) and time to prepare F/V (20.4%). Self-efficacy was lowest for buying more F/V than usual and trying new vegetables. CONCLUSIONS: By addressing cost and convenience and building skills for purchasing and preparing F/V, the VV has the potential to improve F/V consumption in underserved communities.