Technical report: an online international weight control registry to inform precision approaches to healthy weight management.

BACKGROUND: Personalizing approaches to prevention and treatment of obesity will be a crucial aspect of precision health initiatives. However, in considering individual susceptibility to obesity, much remains to be learned about how to support healthy weight management in different population subgroups, environments and geographical locations. SUBJECTS/METHODS: The International Weight Control Registry (IWCR) has been launched to facilitate a deeper and broader understanding of the spectrum of factors contributing to success and challenges in weight loss and weight loss maintenance in individuals and across population groups. The IWCR registry aims to recruit, enroll and follow a diverse cohort of adults with varying rates of success in weight management. Data collection methods include questionnaires of demographic variables, weight history, and behavioral, cultural, economic, psychological, and environmental domains. A subset of participants will provide objective measures of physical activity, weight, and body composition along with detailed reports of dietary intake. Lastly, participants will be able to provide qualitative information in an unstructured format on additional topics they feel are relevant, and environmental data will be obtained from public sources based on participant zip code. CONCLUSIONS: The IWCR will be a resource for researchers to inform improvements in interventions for weight loss and weight loss maintenance in different countries, and to examine environmental and policy-level factors that affect weight management in different population groups. This large scale, multi-level approach aims to inform efforts to reduce the prevalence of obesity worldwide and its associated comorbidities and economic impacts. TRIAL REGISTRATION: NCT04907396 (clinicaltrials.gov) sponsor SB Roberts; Tufts University IRB #13075.

Food Choice With Economic Scarcity and Time Abundance: A Qualitative Study.

Consumers with low income in the United States have higher vulnerability to unhealthy diets compared with the general population. Although some literature speculates that scarcity is an explanation for this disparity, empirical evidence is lacking. We conducted a qualitative study of food choice to explore whether scarcity-related phenomena, such as tunneling and bandwidth tax, may contribute to unhealthy dietary choices. We used participant-driven photo elicitation (n = 18) to investigate the food choice behaviors of individuals living in the greater Boston area who met the federal guidelines for poverty. Participants took photos at the point of food acquisition for 1 month, after which we interviewed them using a semistructured interview guide with the photos as prompts. Thematic coding was used for analysis. Respondents had relative time abundance. Two major themes emerged: participants used a set of strategies to stretch their budgets, and they highly prioritized cost and preference when making food choices. The extreme focus on obtaining food at low cost, which required time and effort, was suggestive of tunneling. We found no evidence of the bandwidth tax. Our findings raise the hypothesis of scarcity as a continuum: when individuals experience multiple resource constraints, they experience scarcity; whereas people with very limited finances and relative time abundance may instead be in a prescarcity condition, with a hyperfocus on a scarce resource that could lead to tunneling as constraints increase. Additional studies are needed to understand whether and how tunneling and bandwidth tax emerge, independently or together, as people face different levels and types of scarcity.

Impact of the community eligibility provision program on school meal participation in Texas.

OBJECTIVE: To estimate the impact of opting into the community eligibility provision (CEP) on school meal participation among students in Texas. DESIGN: A quasi-experimental design using a two-way fixed effects panel difference-in-difference model and the variation in adoption timing to estimate the impact of opting into CEP on student breakfast and lunch participation in eligible, ever-adopting schools. SETTING: All public and charter K-12 schools in Texas participating in national school meals (breakfast and/or lunch) from 2013 to 2019 who are eligible for the CEP program in at least 1 year and choose to opt into the program in at least 1 year (n 2797 unique schools and 16 103 school-years). PARTICIPANTS: School-level administrative data from the Texas Department of Agriculture on meal counts, enrollment and summary characteristics of students merged with district-level educational and socio-demographic data from the Texas Education Authority. RESULTS: We find opting into CEP increased school breakfast participation by 4·59 percentage points (P < 0·001) and lunch participation by 4·32 percentage points (P < 0·001), on average. The effect is slightly larger (4·64 and 4·61, respectively) and still statistically significant when excluding summer months. CONCLUSION: Our findings suggest that opting into CEP modestly increases school meal participation in Texas, with a similar impact on breakfast and lunch.

Helping parents provide vegetable snacks: Investigating price and taste as barriers.

Snacks contribute nearly one-quarter of children's daily energy intake in the USA. Snack time therefore represents an opportunity for parents to provide foods with key nutrients. Instead, the most common snack foods are major contributors to children's consumption of added sugars and sodium. Parents face major barriers to providing healthier snacks, including perceptions of high cost and lack of child acceptance. We obtained both economic and qualitative data to inform and optimize interventions for parents to promote vegetable snacks for children. We conducted a survey with parents (n = 368) to estimate how much of a discount would influence vegetable snack purchases by estimating willingness-to-pay using the contingent valuation method, using baby-cut carrots as a sample product. We conducted three focus groups (n = 19) and 1 group interview (n = 2) with children to help understand how to increase the appeal of vegetable snacks. Most (70%) parents accepted the reference price for the vegetable snack. Among those who did not, contingent valuation analysis revealed that a mean discount of approximately 30% would shift consumers to purchasing the snack. Focus group results revealed that the appeal of vegetable snacks to children was influenced by how they were prepared and presented, and the child's familiarity with the vegetables and ability to choose among them. This study lays the groundwork for effective interventions to promote the provision of vegetable snacks by parents.