The Role of WIC in Obesity Prevention

How policy implementation shapes the impact of U.S. food assistance policies: the case study of the Child and Adult Care Food Program

Much of the chronic disease burden in the U.S. population can be traced to poor diet. There has been a sustained focus on influencing children's diets and encouraging healthier eating habits by changing policies for what foods and beverages can be served to children through large federally-funded nutrition assistance programs. Yet without attention to how nutrition policies are implemented, and the surrounding context for these policies, these policy changes may not have the intended results. In this perspective, we used Bullock et al.'s (2021) Process Model of Implementation from a Policy Perspective to analyze how the complexities of the implementation process of large-scale nutrition policies can dilute potential health outcomes. We examine the Child and Adult Care Food Program (CACFP), a federal program focused on supporting the provision of nutritious meals to over 4 million children attending childcare, as a case study. We examine how the larger societal contexts of food insecurity, attitudes towards the social safety net, and a fragmented childcare system interact with CACFP. We review the "policy package" of CACFP itself, in terms of its regulatory requirements, and the various federal, state, and local implementation agencies that shape CACFP's on-the-ground implementation. We then review the evidence for how each component of the CACFP policy implementation process impacts uptake, costs, feasibility, equity, and effectiveness at improving children's nutrition. Our case study demonstrates how public health researchers and practitioners must consider the complexities of policy implementation processes to ensure effective implementation of nutrition policies intended to improve population health.

Sex differences in overweight and obesity among Mexican Americans in the National Health and Nutrition Examination Survey: A comparison of measures

The increasing prevalence of overweight and obesity in the United States, and disparities by race, ethnicity, and gender, have caused concern among public health practitioners, health care providers, and others, in part because overweight and obesity may be linked to chronic health problems and weight stigma. Researchers have traditionally relied upon body mass index (BMI) as a measure of overweight and obesity, despite its limitations. In this study we apply an intersectional framework and use data from the 2011-2018 waves of the nationally representative National Health and Nutrition Examination Survey (NHANES) to study sex differences in the risk of overweight and obesity among Mexican Americans, triangulating three measures that proxy for overweight and obesity: BMI, high waist circumference, and high percent body fat. We assess heterogeneity across nativity, education, income by parenthood status, food security, time in the United States (for immigrants), and receipt of SNAP/WIC benefits (for the low-income sample). Results from logistic regression models indicate choice of cutoff values and measure are critical to determining whether sex disparities exist. We find no evidence of disparities in BMI but evidence of greater risk for females using traditional cutoff values for high waist circumference and high percent body fat. Adjusted cutoff values provide differing results. Minimal heterogeneity is seen. Results reinforce the importance of considering sex disparities and emphasize the importance of critically examining measures that proxy for overweight and obesity risk, given the high stakes surrounding weight stigma.

WIC Participants’ Perceptions of the Cash-Value Benefit Increase during the COVID-19 Pandemic

Recent changes to the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) Cash-Value Benefit (CVB), which provides participants with money to spend on fruits and vegetables, have the potential to reduce disparities in healthy food access and food insecurity that were exacerbated by the COVID-19 pandemic. However, few studies have examined how the changes to the CVB allotment that occurred during the pandemic influenced WIC participants’ perceptions of the benefit or their fruit and vegetable purchasing and consumption. To address this gap, we conducted semi-structured interviews with 51 WIC participants in Wilmington, Delaware. Survey measures included demographic questions, the Hunger Vital Sign food insecurity screener, and open-ended questions regarding perceptions of the CVB increase and its influence on participants’ fruit and vegetable purchasing and consumption. Data were analyzed using a hybrid inductive and deductive coding approach. The results demonstrate that higher CVB allotments increased WIC participants’ purchasing and consumption of fruits and vegetables, increased the frequency of their shopping occasions, and enhanced their dietary variety. Our findings also suggest that WIC participants highly value the increased CVB. Consequently, maintaining the increased CVB allotment could improve the nutritional outcomes of low-income mothers, infants, and children participating in WIC.

Participation in the Special Supplemental Nutrition Program for Women, Infants, and Children and Dietary Intake in Children: Associations With Race and Ethnicity

INTRODUCTION

Establishing healthy dietary intake in pediatric populations is important for prevention of chronic disease across the lifespan. Federal nutrition assistance programs can support the dietary intake of U.S. children. The objective of this study was to assess the relationship between Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) participation status and dietary intake within racial and ethnic groups.

METHODS

Dietary intake of children aged 2-4 years in the cross-sectional National Health and Nutrition Examination Survey 2011-2016 was analyzed in 2021. Multivariable linear regression was used to compare stratum-specific mean estimates for nutrient and food group intake of children participating in Special Supplemental Nutrition Program for Women, Infants, and Children (reference group) with those of nonparticipants who were income eligible and income ineligible (i.e., above income limits) for the WIC program. Significance was set to Bonferroni-corrected p-values.

RESULTS

Hispanic WIC participants consumed less added sugar (8.9 [SE=0.5] teaspoons) than their higher-income counterparts (14.6 [SE=1.5] teaspoons, p<0.001). Hispanic WIC participants also consumed more fiber (13.0 [SE=0.6] grams) than income-eligible (11.4 [SE=0.7] grams, p=0.032) and income-ineligible (i.e., higher-income, 9.4 [SE=1.3] grams, p=0.019) nonparticipants, but this was not significant at the Bonferroni-adjusted p-value of 0.01. No differences in dietary intake were observed by WIC participation status for non-Hispanic White and non-Hispanic Black children.

CONCLUSIONS

Participation in WIC was associated with healthier dietary outcomes among Hispanic children; however, dietary intake of White and Black children was comparable by WIC participation status. Federal nutrition assistance programs should support sound nutrition, an important factor in reducing the risk of chronic disease, in all groups.

The Impact of COVID-19 on Breastfeeding Rates in a Low-Income Population

Objective: To examine the impact of the coronavirus disease 2019 (COVID-19) pandemic on breastfeeding outcomes among participants of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) in Southern California. Materials and Methods: Data from the 2020 Los Angeles County triennial WIC Survey were used to examine the impact of COVID-19 on breastfeeding outcomes among WIC participants. Chi-square tests were used to explore the association between the COVID-19 pandemic and breastfeeding outcomes along with hospital-friendly practices. Results: Compared with infants born before March 2020, the percentage of infants who received any breastfeeding at 1 month decreased from 79.66% to 76.96% (p = 0.139). The percentage of infants who received any breastfeeding at 3 and 6 months significantly decreased from 64.57% to 56.79% (p = 0.001) and from 48.69% to 38.62% (p = 0.0035), respectively. The percentage of infants fully breastfed at 1, 3, and 6 months significantly decreased at all time points. Examining hospital practices, there were no differences between the before and during COVID-19 groups. Conclusions: The prevalence of any breastfeeding at 3 and 6 months and fully breastfeeding at 1, 3, and 6 months was significantly lower among mothers who gave birth during the pandemic compared with mothers who gave birth before the pandemic. The shift to remote services delivery and the corresponding reduction in live support of WIC services owing to the pandemic may explain the decline in the breastfeeding rate. As the nation and the WIC program prepare for the postpandemic life, it is critical to ensure that breastfeeding support is met in a hybrid of remote and face-to-face settings.

Using Interactive Text Messaging to Improve Diet Quality and Increase Redemption of Foods Approved by the Special Supplemental Nutrition Program for Women, Infants, and Children: Protocol for a Cohort Feasibility Study

BACKGROUND

Children in the United States eat too few fruits, vegetables, and whole grains and too many energy-dense foods; these dietary behaviors are associated with increased risk of obesity. Maternal diet plays a key role in shaping children's diets; however, many mothers have poor diet quality, especially those living in low-income households. The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) is a federal nutrition assistance program that provides mothers and children with nutrient-dense foods, and those who participate have better diet quality. However, many mothers do not redeem all their WIC-approved foods. Thus, there is a need to create effective interventions to improve diet quality, especially among low-income children and families.

OBJECTIVE

This paper aims to describe the development and protocol for a study to evaluate the feasibility, satisfaction, and preliminary efficacy of a fully automated text messaging intervention as a strategy to improve maternal diet quality and the redemption of WIC-approved foods.

METHODS

We describe the use of the framework developed for the description of nonrandomized feasibility studies. Using an observational, prospective cohort study design, we will recruit mothers enrolled in WIC with a child aged ≤2 years. Participants will receive automated SMS text messages aimed at improving the redemption of WIC-approved foods to improve the participants' diet quality for 12 weeks. All outcome measures will be analyzed using descriptive and inferential statistics. Qualitative data will be analyzed using thematic analysis.

RESULTS

Data collection for this study began in March 2021. We expect the study results to be available within 9 months of study commencement. The results will shed light on the feasibility, acceptability, and effectiveness of using automated text messages as a behavior change strategy for mothers enrolled in WIC.

CONCLUSIONS

The results of this pilot study will explore whether this digital behavioral intervention, which will deliver nutrition guidance in accordance with the Dietary Guidelines for Americans using interactive self-monitoring and feedback, is feasible and acceptable. This will lay the foundation for a larger evaluation to determine efficacy for improving diet quality in those most at risk for obesity.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04098016; https://clinicaltrials.gov/ct2/show/NCT04098016.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/32441.

App Usage Associated With Full Redemption of WIC Food Benefits: A Propensity Score Approach

OBJECTIVE

To examine the relationship between WICShopper application (app) usage and full redemption of Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food benefits.

DESIGN

A cross-sectional study.

SETTING

West Virginia WIC program.

PARTICIPANTS

A total of 23,050 West Virginia WIC households in 2019.

MAIN OUTCOME MEASURES

Full redemptions were defined as the redemption rate of ≥ 90% for a given food benefit.

ANALYSIS

App/non-app users were defined as households with someone using/not using the WICShopper app. Multivariate logistic regressions were applied. To address the potential self-selection bias in app usage, the propensity score (PS) of app usage was estimated. The regressions were rerun with the balanced sample by matching the PS.

RESULTS

With PS matching, the prevalence of full redemption at the household level was 7.2% for app users vs 4.7% for nonapp users (odds ratio, 1.64; 95% confidence interval, 1.40-1.92; P < 0.001). App users had a higher prevalence of full redemption in most food categories, even with PS matching.

CONCLUSIONS AND IMPLICATIONS

Use of the WICShopper app was associated with a higher prevalence of full redemptions in most food benefits after controlling the self-selection bias.

WIC Participants' Perspectives About Online Ordering and Technology in the WIC Program

OBJECTIVE

The objective of this study was to assess the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) participants' perceptions about ordering WIC groceries online.

METHODS

Qualitative semistructured interviews were conducted with 24 WIC participants in East Tennessee from May to October 2019. Interviews were transcribed verbatim and analyzed using a grounded theory approach.

RESULTS

Participants were interested in online ordering and spoke favorably about delivery and pickup options. Participants were willing to pay $2-5 to order online, though they were more willing to pay for a home or curbside delivery than an in-store pickup. Participants suggested additional ways to integrate technology into WIC food retail operations, such as providing benefit balances via text message and developing a mobile phone application for Tennessee WIC.

CONCLUSIONS AND IMPLICATIONS

Findings can inform pilot tests for WIC online ordering.

A Qualitative Exploration of Predominantly White Non-Hispanic Tennessee WIC Participants' Food Retail and WIC Clinic Experiences During COVID-19

BACKGROUND

The novel coronavirus disease 2019 (COVID-19) has widened many existing nutrition disparities. In response, federal nutrition assistance programs have introduced flexibility waivers in programs, including the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), to rapidly respond to support the nutritional health status of income-eligible participants during COVID-19. Waivers were approved that permitted flexibilities in the WIC food package, WIC vendor guidelines, and WIC clinic experience. The impact of these waivers on WIC participants' retail and clinic experiences remains unknown.

OBJECTIVES

Our aims were to understand the experiences of WIC participants in food retail settings and with WIC clinics during the COVID-19 pandemic and to explore WIC participants' perceptions of the impact of COVID-19 on their family's overall health, well-being, and daily lives.

DESIGN

We conducted semi-structured phone interviews between April 30 and May 7, 2020.

PARTICIPANTS/SETTING

Participants were 24 adults in WIC-enrolled families residing in Tennessee.

ANALYSIS

Using grounded theory as the analytical framework, 2 coders completed an iterative, data-driven analytic process within NVivo, version 12. Hierarchical maps, coding matrices, and concept maps were used to aid direct content analysis for theme detection.

RESULTS

Five primary themes emerged, including shopping barriers (existing compounded with new), coping strategies, impact on mental and emotional health, social comparison, and unintended consequences of COVID-19 on WIC families.

CONCLUSIONS

COVID-19 created additional barriers to food security among WIC families and negatively affected their health and well-being. To meet the needs of this vulnerable population during and beyond the pandemic, the carryover of WIC flexibilities (ie, physical presence and food package substitution waivers) after COVID-19 may improve the ease of overall program participation.

Perceived barriers to and suggested interventions for physical activity during pregnancy among participants of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) in Southern California

Background

The American College of Obstetricians and Gynecologists (ACOG) recommends that pregnant women engage in at least 20 to 30 min of moderate-intensity physical activity on most days of the week. Regular exercise during pregnancy is associated with many benefits for the mother and the developing fetus; yet, a large number of pregnant women do not engage in the recommended amounts. This study aimed to investigate barriers to and interventions for physical activity among pregnant WIC participants in Southern California.

Methods

We conducted four focus groups (FGs) with pregnant low-income women aged 18 years or older in either their second or third trimester. FGs were conducted at a WIC center in Southern California. The FGs were held according to language (English vs. Spanish-speaking) and BMI category (normal weight vs. overweight and obese). A total of 28 women participated. We used ATLAS. ti. to analyze the focus group transcripts. The study adhered to the Consolidated Criteria for Reporting Qualitative Research.

Results

The mean age of focus group participants was 28.9 years (SD = 6.6), and the majority were Latina. Intrapersonal barriers to physical activity were fatigue and lack of energy, pain and swelling, lack of childcare, medical restrictions and safety concerns, lack of knowledge about exercise safety, and lack of time. Interpersonal barriers included concerns and lack of support from partners and families, conflicting advice from friends and neighbors, and lack of advice on safe exercise from physicians. Women in all four groups suggested a community-based intervention where they can mingle with each other and share their challenges and concerns. Other suggestions to interventions differed among groups and reflected the women’s experiences and backgrounds. Specifically, to promote education, English-speaking women preferred a brochure while Spanish-speaking women preferred a video. Overweight women emphasized including children in their exercise activities to promote healthy behavior in youth.

Conclusions

Interventions should be tailored to pregnant women’s needs. Primary care providers should provide reassurance and information to pregnant women and their partners on the type and frequency of safe exercise.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12884-021-03553-7.

Agreement in Infant Growth Indicators and Overweight/Obesity between Community and Clinical Care Settings

BACKGROUND

Infants from low-income backgrounds receive nutrition care from both community and clinical care settings. However, mothers accessing these services have reported receiving conflicting messages related to infant growth between settings, although this has not been examined quantitatively.

OBJECTIVE

Describe the agreement in infant growth assessments between community (Special Supplemental Nutrition Program for Women, Infants, and Children) and clinical (primary care providers) care settings.

DESIGN

A cross-sectional, secondary data analysis of infant growth measures abstracted from electronic data management systems.

PARTICIPANTS AND SETTING

Participants included a convenience sample of infants (N = 129) from northeastern Pennsylvania randomized to the WEE Baby Care study from July 2016 to May 2018. Infants had complete anthropometric data from both community and clinical settings at age 6.2 ± 0.4 months. Average time between assessments was 2.7 ± 1.9 weeks.

MAIN OUTCOME MEASURES

Limits of agreement and bias in weight-for-age, length-for-age, weight-for-length, and body-mass-index-for-age z scores as well as cross-context equivalence in weight status between care settings.

STATISTICAL ANALYSIS PERFORMED

Bland-Altman analyses were used to describe the limits of agreement and bias in z scores between care settings. Cross-context equivalence was examined by dichotomizing infants' growth indicators at the 85th and 95th percentile cut-points and cross-tabulating equivalent and discordant categorization between settings.

RESULTS

Strongest agreement was observed for weight-for-age z scores (95% limits of agreement -0.41 to 0.54). However, the limits of agreement intervals for growth indicators that included length were wider, suggesting weaker agreement. There was a high level of inconsistency for classification of overweight/obesity using weight-for-length z scores, with 15.5% (85th percentile cut-point) and 11.6% (95th percentile cut-point) discordant categorization between settings, respectively.

CONCLUSIONS

Infant growth indicators that factor in length could contribute to disagreement in the interpretation of infant growth between settings. Further investigation into the techniques, standards, and training protocols for obtaining infant growth measurements across care settings is required.

Correlates of sugar-sweetened beverage intake among low-income women during the first 1000 days

OBJECTIVE

To describe prenatal and postpartum consumption of water, cows' milk, 100 % juice and sugar-sweetened beverages (SSB) among women enrolled in the Special Supplemental Nutrition Program for Women, Infants and Children (WIC) programme in New York City (NYC) and to identify correlates of SSB intake in this population.

DESIGN

Cross-sectional data were collected from structured questionnaires that included validated beverage frequency questionnaires with the assistance of container samples. The association of maternal and household factors and non-SSB consumption with habitual daily energetic (kJ (kcal)) intake from SSB was assessed by using multivariable median regression.

SETTING

WIC programme in NYC, NY. Data were collected in 2017.

PARTICIPANTS

388 pregnant or postpartum women (infant aged <2 years) from the NYC First 1000 Days Study.

RESULTS

Median age was 28 years (interquartile range (IQR) 24-34); 94·1 % were Hispanic/Latina, and 31·4 % were pregnant. Overall, 87·7 % of pregnant and 89·1% of postpartum women consumed SSB ≥ once weekly, contributing to a median daily energetic intake of 410 kJ (98 kcal) (IQR (113-904 kJ) 27-216) and 464 kJ (111 kcal) (IQR (163-1013 kJ) 39-242), respectively. In adjusted analyses, only consumption of 100 % juice was associated with greater median energetic intake from SSB (adjusted β for each additional ounce = 13; 95% CI 8, 31 (3·2; 95 % CI 2·0, 7·3).

CONCLUSIONS

Among pregnant and postpartum women in WIC-enrolled families, interventions to reduce SSB consumption should include reduction of 100 % juice consumption as a co-target of the intervention.

Association Between Usage of an App to Redeem Prescribed Food Benefits and Redemption Behaviors Among the Special Supplemental Nutrition Program for Women, Infants, and Children Participants: Cross-Sectional Study

Background

The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) is one of the most important food assistance programs in the United States, serving 6.4 million low-income, eligible women, infants, and children under 5 years of age in 2019. In the program, participants are prescribed a list of food benefits, which can be redeemed in WIC-authorized stores. However, there are multiple behavioral barriers in the program and the stores that prevent participants from redeeming the benefits fully.

Objective

This study aims to examine the relationship between the use of a widely used mobile phone app, WICShopper, and the redemption of the prescribed food packages.

Methods

WIC administrative data were obtained from West Virginia for the period January 2019 to January 2020 and included 30,440 WIC households that had received food benefits in that period. The redemption rates of 18 WIC food benefits were compared between app users and nonapp users, that is, those who never used the app in the study period. The use behaviors were defined for the app users, including the number of active use benefit cycles, active benefit cycle rates, number of active use days in the cycle, and proportion rates of daytime use. Panel linear regressions were applied to examine how the redemption rates were related to these behaviors over time.

Results

App users consistently had higher average redemption rates than nonapp users; the difference ranged from 3.6% (4.8% relative) for infant formula to 14.3% (40.7% relative) for fish. After controlling for sociodemographics, the coefficients of app use were significantly positive for all benefit categories except for WIC-eligible nutritionals. More active cycles and active days in the cycle were significantly related to redemption rates for all categories, except for frozen juice (coefficient=−0.002, P=.09). Daytime app access was positively associated with redemption rates for most food benefits except only a few, such as infant formula (coefficient=−0.03, P<.001).

Conclusions

Use of the WIC app was significantly related to higher redemption rates across food benefits, although the association varied across benefit categories. More active days were positively related to benefit redemptions across food categories, and the app’s daytime use was positively associated with the redemption of most benefit categories. These findings suggest that the WIC app can be an important tool for the promotion of benefit redemption among WIC participants.

Perceived Motivators, Barriers and Intervention Strategies Related to Weight Loss After Childbirth Among WIC Participants in Southern California

PURPOSE

To explore perceived motivators and barriers to weight loss after childbirth and ideas for postpartum weight loss interventions among participants of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC).

APPROACH

Four (2 with English-speaking and 2 with Spanish-speaking participants) focus groups were conducted.

SETTING

A WIC clinic in Southern California.

PARTICIPANTS

Of 22 participants, the majority were Hispanic/Latina. The mean age of the mothers' infants was 6.18 months.

MEASURES

A structured focus group guide was used.

ANALYSIS

Audio-recordings were transcribed verbatim. The Spanish transcriptions were reviewed for discrepancies by a bilingual coinvestigator and translated into English for analysis. Transcriptions of the focus group audio-recordings were organized in ATLAS.ti version 8.0. and analyzed using content analysis.

RESULTS

Participants had a mean age of 30.5 and a mean prepregnancy body mass index of 32.4. Motivators for weight loss after childbirth included modeling healthy behavior for children and a fear of developing chronic illness. Barriers to weight loss included lack of knowledge, self-efficacy, time, child care and support, postpartum depression, the 40-day rule, and having a c-section. Intervention ideas included providing accountability and peer support for weight loss, providing nutrition/exercise weight loss strategies, and integrating mobile phone technologies into weight loss programs.

CONCLUSIONS

Weight loss strategies for postpartum WIC participants should provide knowledge, support, accountability, and preferably integrate technology.