Cross-sectional associations of WIC benefit redemption and diet among children ages 1-4 years in California.

BACKGROUND: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides supplemental healthy foods to children under age 5 years in low-income households. OBJECTIVE: To characterize WIC benefit redemption, identify associations between benefit redemption with child dietary intake, and whether child age modifies these associations. DESIGN: The cross-sectional 2023 California Statewide WIC Survey, conducted with caregivers of WIC-participating children ages 1-4 years, was analyzed for this study. Included children had complete benefit redemption data, a complete National Health and Nutrition Examination Survey Dietary Screener Questionnaire (DSQ), and complete covariate data (weighted n=2,244). Monthly household category-specific benefit redemption percentage was averaged across 6 and 3 months preceding survey completion. Associations between household redemption and child dietary intake (servings or amount/day) were assessed with multivariable linear regression and expressed as estimates and 95% confidence intervals (CI). RESULTS: Twenty-five percent higher redemption of breakfast cereal, whole grain bread, yogurt and whole milk in the 6 months prior to the survey were associated with higher child intake frequency for cereal (0.02 servings/day, 95% CI [0.00, 0.04]), whole grain bread (0.02 [0.00, 0.03]), yogurt (0.04 [0.02, 0.06]), and whole milk (0.09 [0.01, 0.16]). Significant effect modification by child age (12 to <24 months, 24 to 59 months) was found for redemption of cheese/tofu and 100% juice (interaction p-values 0.02 and 0.001, respectively), and 25% higher redemption of these benefits were associated with lower intake frequency for cheese (-0.05 servings/day, 95% CI [-0.09, -0.02]) and higher intake frequency for juice (0.12 [0.06, 0.18]), but only among children ages 12 to <24 months. CONCLUSIONS: Higher redemption was associated with higher child intake of select WIC foods. Pairing the promotion of benefit redemption among program participants with nutrition education efforts may enhance dietary impacts of WIC participation.

The neighborhood food environment modifies the association between infant feeding and childhood obesity.

BACKGROUND: The Special Supplemental Nutrition Program for Women, Infants and Children (WIC) issues infant formula to infants who are not fully breastfed, and prior research found elevated obesity risk among children receiving lactose-reduced infant formula with corn syrup solids (CSSF) issued by WIC. This study was conducted to evaluate associations between a broader set of specialty infant formulas issued by WIC and child obesity risk, whether neighborhood context (e.g. neighborhood food environment) modifies associations, and whether racial/ethnic disparities in obesity are partly explained by infant formula exposure and neighborhood context. METHODS: WIC administrative data, collected from 2013-2020 on issued amount (categorical: fully formula fed, mostly formula fed, mostly breastfed, fully breastfed) and type of infant formula (standard cow's milk formula, and three specialty formulas: any CSSF, any soy-based formula, and any cow's milk-based formula with added rice starch) and obesity at ages 2-4 years (defined as a Body Mass Index z-score ≥ 95th percentile according to World Health Organization growth standard) were used to construct a cohort (n = 59,132). Associations of infant formula exposures and race/ethnicity with obesity risk were assessed in Poisson regression models, and modification of infant feeding associations with obesity by neighborhood context was assessed with interaction terms. RESULTS: Any infant formula exposure was associated with significantly higher obesity risk relative to fully breastfeeding. Receipt of a CSSF was associated with 5% higher obesity risk relative to the standard and other specialty infant formulas (risk ratio 1.05, 95% confidence interval 1.02, 1.08) independent of breastfeeding duration and receipt of other specialty infant formulas. The association between CSSF and obesity risk was stronger in neighborhoods with healthier food environments (10% higher risk) compared to less healthy food environments (null). Racial/ethnic disparities in obesity risk were robust to adjustment for infant formula exposure and neighborhood environment. CONCLUSIONS: Among specialty infant formulas issued by WIC, only CSSFs were associated with elevated obesity risk, and this association was stronger in healthier food environments. Future research is needed to isolate the mechanism underlying this association.

Examination of community-level interventions addressing early childhood obesity in Los Angeles County.

Objective: To help inform decisions regarding the equitable implementation of obesity interventions, we examined whether interventions were equitably reaching the most vulnerable communities, identified communities that received fewer interventions than expected, and estimated the effect of 'dose' of interventions on obesity prevalence. Methods: We created a database to identify and characterize obesity-related interventions implemented in Los Angeles County from 2005 to 2015 linked to community-level sociodemographic and obesity prevalence data. We ran generalized linear models with a Gamma distribution and log link to determine if interventions were directed toward vulnerable communities and to identify communities that received fewer interventions than expected. We ran fixed-effects models to estimate the association between obesity prevalence and intervention strategy count among preschool-aged children enrolled in the Special Supplemental Nutrition Assistance Program for Women Infants and Children. Results: We found that interventions targeted vulnerable communities with high poverty rates and percentages of minority residents. The small cluster of communities that received fewer interventions than expected tended to have poor socioeconomic profiles. Communities which received more intervention strategies saw greater declines in obesity prevalence (ß = -0.023; 95 % CI: -0.031, -0.016). Conclusions: It is important to determine if interventions are equitably reaching vulnerable populations as resources to tackle childhood obesity become available. Evaluating the population impact of multiple interventions implemented simultaneously presents methodological challenges in measuring intervention dose and identifying cost-effective strategies. Addressing these challenges must be an important research priority as community-wide interventions involve multiple intervention strategies to reduce health disparities.

Associations of Increased WIC Benefits for Fruits and Vegetables With Food Security and Satisfaction by Race and Ethnicity.

Introduction: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides nutrition support for racially and ethnically diverse populations. In 2021, the monthly cash value benefit (CVB) for the purchase of fruits and vegetables increased from $9 to $35 and was later adjusted to $24. This study investigated, by racial and ethnic groups, whether CVB increases were associated with increases in CVB redemption, household food security, child fruit and vegetable intake, satisfaction with CVB amount, and likelihood of continued participation in WIC if the CVB returned to $9 per month. Methods: We conducted a longitudinal study of WIC participants (N = 1,770) in southern California at 3 time points, from April 2021 through May 2022; the CVB amount was $9 at baseline, $35 at Survey 2, and $24 at Survey 3. Racial and ethnic groups were Hispanic English-speakers, Hispanic Spanish-speakers, non-Hispanic Asian, non-Hispanic Black, non-Hispanic Other, and non-Hispanic White. We used mixed-effect and modified Poisson regressions to evaluate outcomes by group. Results: At baseline, groups differed significantly in dollars of CVB redeemed, percentage of CVB redeemed, household food security, and satisfaction with CVB amount. After the increase in CVB, we found increases in all groups in CVB redemption, household food security, and satisfaction. Non-Hispanic Black and Hispanic English-speaking groups, who had low levels of satisfaction at baseline, had larger increases in satisfaction than other groups. Reported likelihood of continued WIC participation if the monthly CVB returned to $9 also differed significantly by group, ranging from 62.5% to 90.0%. Conclusion: The increase in CVB for children receiving WIC benefited all racial and ethnic groups. Continued investment in an augmented CVB could improve health outcomes for a racially and ethnically diverse WIC population.

Any Infant Formula Amount, but Not Infant Formula Type, Is Associated with Less Healthful Subsequent Beverage Intake among Special Supplemental Nutrition Program for Women, Infants, and Children-Participating Children.

Background: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides nutrition assistance to low-income households, including infant formula for infants not fully breastfeeding. Issuance of lactose-reduced infant formula made with corn syrup solids (CSSF) is associated with elevated risk of obesity in early life, but associations between formula type and dietary intake have not been examined. Objectives: To evaluate associations between infant formula (amount and type) issued by WIC with subsequent child diet at ages 12-59 mo. Methods: Dietary data from 2014, 2017, and 2020 Los Angeles County WIC Survey respondents (n = 1339 children, 12-59 mo of age) were merged with WIC administrative data on infant feeding (amount and type of infant formula at ages 0-12 mo). Intake frequencies were available for sweetened beverages, sweets, juice, fast food, water, fruit, vegetables, and milk. Infant feeding was categorized by amount of WIC-issued formula (descending: fully formula fed, mostly formula fed, mostly breastfed, fully breastfed) and issuance of a CSSF (any, none). Associations between infant feeding (infant formula amount and type) and child diet were evaluated in multivariable generalized estimating equation negative binomial regression models, stratified by child age (12 to <24 mo, 24 to <60 mo). Results: Any infant formula issuance in the first year of life was adversely associated with subsequent dietary intake. This included 21%-23% higher 100% juice intake at 24 to <60 mo and 11%-13% (at 24 to <60 mo) or 20%-22% (at 12 to <24 mo) lower water intake. CSSF receipt compared with only other infant formula was not consistently associated with subsequent child diet. Conclusions: Any infant formula amount, but not CSSF receipt compared with other formula types, was associated with less healthful beverage intake patterns among WIC-participating children. WIC nutrition education may have a stronger impact if tailored based on infant feeding practices.

Surveillance of Infant Formula Shortages Using Special Supplemental Nutrition Program for Women, Infants, and Children Administrative Data.

OBJECTIVE: To quantify self-reported difficulty accessing Special Supplemental Nutrition Program for Women, Infants, and Children (WIC)-issued infant formula among participants early in the coronavirus disease 2019 (COVID-19) pandemic, to determine if infant formula redemption was associated with self-reported difficulty accessing infant formula, and to quantify changes in formula redemption during the 2022-2023 US infant formula shortages. DESIGN: A cross-sectional study and time series data. SETTING: Families participating in the WIC program in the Los Angeles metropolitan area from November 2019 to June 2023. PARTICIPANTS: Families with infants (aged 0-12 months) issued infant formula by WIC with a completed 2020 Los Angeles County WIC Survey (n = 1,897) or issued infant formula by a large WIC program in Southern California between November 2019 and June 2023 (n = 109,135). MAIN OUTCOME MEASURES: Incidence of ≥ 30% reduction in infant formula redemption and interval-scaled infant formula redemption. ANALYSIS: Special Supplemental Nutrition Program for Women, Infants, and Children formula redemption data were matched to 2020 Los Angeles County WIC Survey data to determine if self-reported difficulty accessing infant formula was associated with administrative infant formula redemption data using negative binomial regression and were used to quantify the prevalence and severity of incomplete formula redemption during 2020-2023 formula shortages using ordinal logistic regression (outcome: interval-scaled formula redemption). RESULTS: Few (13.0%) caregivers reported difficulty accessing the WIC-issued formula early in the COVID-19 pandemic. The 2.8% who reported an unresolved shortage early in the COVID-19 pandemic had 201% higher rates of ≥ 30% declines in formula redemption (incidence rate ratio [IRR], 3.01; 95% confidence interval, 1.57-5.79, P < 0.001) than those with no difficulties. Incomplete formula redemption odds were significantly elevated throughout the COVID-19 pandemic from March 2020 to January 2022 and increased further during the 2022-2023 infant formula shortages from February 2022 to June 2023, reaching 342% higher in October 2022 than February 2020 (odds ratio, 4.42; 95% confidence interval, 4.14-4.72; P < 0.001). CONCLUSIONS AND IMPLICATIONS: Special Supplemental Nutrition Program for Women, Infants, and Children redemption data are an adequate proxy for population-level infant formula access issues among households with low income but are insufficiently sensitive for screening at a household level. US formula shortages (2020-2023) demonstrate the need for improved coordination between nutrition assistance programs, regulatory bodies, and commercial food systems, particularly during acute supply crises.

Sleep Duration Is Associated with Household Food Insecurity and Sugar-Sweetened Beverage Intake Among Women, Infants and Children Participating Children Ages 0-5.

PURPOSE: To determine associations between child and household characteristics and sleep duration among low-income children in Los Angeles County. DESIGN: Cross-sectional study. SETTING: Survey data collected in 2017 and 2020 in Los Angeles County, California. SAMPLE: Special Supplemental Nutrition Program for Women, Infants and Children (WIC) households with children ages 4-60 months. MEASURES: Sleep duration for children 4-60 months old (less than recommended (LTR), recommended range, more than recommended (MTR)), household food insecurity (HFI), sociodemographics, and daily servings of sugar-sweetened beverages (SSB). ANALYSIS: Multinomial logistic regression, stratified by child age, was used to calculate odds ratios (OR) and 95% confidence intervals (CI) for associations between household/child characteristics and LTR or MTR sleep compared to recommended duration among WIC participating children 4-60 months old. RESULTS: The final sample included 3512 children ages 4-23 months and 6035 children ages 24-60 months. In the study population, 32% (3-5 years old) to 44% (4-11months) of children under 5 did not meet the recommended hours of sleep per night. HFI was associated with higher odds of LTR (OR 1.27, CI 1.12-1.45) and MTR (OR 1.46, CI 1.15-1.87) sleep among 24-60 month-old children. Each additional daily SSB serving was associated with higher odds of LTR sleep (4-23 months: OR 1.10, CI 1.02-1.19; 24-59 months: OR 1.12, CI 1.08-1.17). CONCLUSIONS: HFI and SSB intake are associated with not getting the recommended amount of sleep among low-income WIC participating children. Nutrition assistance program participants may benefit from receiving information about recommended sleep duration for young children and how to establish sleep routines to optimize sleep duration.

Lower redemption of monthly Special Supplemental Nutrition Program for Women, Infants and Children benefits associated with higher risk of program discontinuation.

OBJECTIVE: To determine whether Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food benefit redemption is associated with discontinuing WIC participation, failure to recertify, overall and by race/ethnicity-language preference and participant category. DESIGN: Retrospective cohort study, using multivariable modified Poisson regression to determine risk ratios (RR) and 95 % CI for associations between household-level food benefit redemption (interval-scaled benefit redemption percent, averaged across WIC benefit subcategories, for the final 3, 6 and 12 months of certification) and failure to recertify in WIC, overall and within strata of race/ethnicity-language preference and participant category. SETTING: WIC administrative data collected November 2019-July 2021 in Southern California. PARTICIPANTS: WIC-participating children ages 0-3 years at initial certification from November 2019 to May 2020 (n 41 263). RESULTS: In all time periods, and for all subgroups, every 10 % lower food benefit redemption was associated with increased risk of failure to recertify. Among households without missing food benefit data, failure to recertify risk peaked at 505 % higher (RR = 6·05, 95 % CI (5·63, 6·51)) in households with average 12-month redemption <10 % compared with households with ≥70 % redemption. CONCLUSIONS: Lower WIC benefit redemption was associated with higher risk of failing to recertify among participants. Focused nutrition education around benefit redemption may improve WIC retention and child health through incremental increases in food benefit redemption.

Increased WIC Cash Value Benefit is Associated with Greater Amount and Diversity of Redeemed Fruits and Vegetables among Participating Households.

Background: Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food packages for children ages 1 to 4 y include a cash value benefit (CVB) redeemable for fruits and vegetables (FVs) with participating vendors. The CVB value was increased beginning in June 2021. Objectives: This study evaluated associations of the augmented CVB with the amount and diversity of redeemed FVs. Methods: Price look-up codes (PLUs) in redemption data determined outcomes including any redemption (any, none), amount redeemed (United States dollars [USD]/mo), and percent of total CVB redemption (percent) in 54 FV commodity groups among a cohort of 1770 WIC-participating children in Southern California. Outcomes across all commodity groups for fresh fruits, fresh vegetables, and all FVs were evaluated including dollar amount redeemed, percentage of redemption, and diversity of produce redeemed (variety and balance among items redeemed). Comparisons were made between augmented CVB periods (35 USD/mo in June-September 2021, 24 USD/mo October 2021-June 2022) and the preaugment period (9 USD/mo in June 2020-May 2021). Associations were tested in multivariable generalized estimating equation Poisson (any redemption) and linear (amount, percent, diversity) regression models. Results: The augmented CVB was associated with higher any redemption prevalence and amount redeemed for 53 of 54 commodity groups at both 35 USD/mo and 24 USD/mo compared with 9 USD/mo. Redemption diversity increased for both fruits, vegetables, and all produce during both augment periods, and modestly greater increases in redeemed fruits relative to vegetables were observed at 35 USD/mo. The most commonly redeemed vegetables were tomatoes, onions, cucumbers, peppers, and avocados and the most commonly redeemed fruits were bananas, apples, grapes, limes, and melons. Conclusions: The augmented CVB was associated with greater redeemed FV amount and greater redeemed FV diversity. Data on FV intake diversity among WIC-participating children are needed to understand dietary impacts of the CVB increase.

Increased WIC Benefits for Fruits and Vegetables Increases Food Security and Satisfaction Among California Households with Young Children.

BACKGROUND: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) is a critical source of nutrition support for young children in low-income families, providing access to healthy foods and a cash value benefit (CVB) for the purchase of fruits and vegetables (FV). In 2021, the WIC CVB increased substantially for women and children aged 1 to 5 years. OBJECTIVE: To investigate whether or not the increased WIC CVB for purchasing FV was associated with greater redemption of the FV benefit, satisfaction, household food security, and child FV intake. DESIGN: Longitudinal study of WIC participants receiving WIC benefits from May 2021 through May 2022. Through May 2021, the WIC CVB for children aged 1 to 4 years was $9/month. The value increased to $35/month from June through September 2021, and changed to $24/month starting October 2021. PARTICIPANTS AND SETTING: WIC participants from seven WIC sites in California with one or more child aged 1 to 4 years during May 2021 and one or more follow-up surveys during September 2021 or May 2022 (N = 1,770). MAIN OUTCOMES AND MEASURES: CVB redemption (in US dollars), satisfaction with the amount (prevalence), household food security (prevalence), and child FV intake (cups per day). STATISTICAL ANALYSES: Associations of increased CVB issuance following the June 2021 CVB augmentation with child FV intake and CVB redemption were assessed using mixed effects regression, and associations with satisfaction and household food security were assessed using modified Poisson regression. RESULTS: The increased CVB was associated with significantly greater redemption and satisfaction. At the second follow-up (May 2022), household food security increased by 10% (95% CI 7% to 12%); total FV intake decreased by 0.03 c/day (95% CI -0.06 to -0.01) in the overall sample, but increased by 0.23 c/day (95% CI 0.17 to 0.29) among children with the lowest baseline FV intake. CONCLUSIONS: This study documented benefits of augmentation to the CVB for children. WIC policy augmenting the value of WIC food packages to increase access to FV had the intended effects, lending support to making the increased FV benefit permanent.

Use of Interactive Texting Is Associated With Higher Odds of Continued WIC Participation During the COVID-19 Pandemic.

BACKGROUND: In Los Angeles County (LAC), California, the demand for Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) services increased during the COVID-19 pandemic, concurrent with the shift to fully remote WIC service delivery in March 2020. Technologies for facilitating remote services were critical for accommodating increases in participation during the COVID-19 pandemic. OBJECTIVE: The objective of this study was to quantify patterns of remote-service utilization and to determine whether use of remote services (phone, interactive texting, e-mail, online education, video appointments) was associated with higher rates of recertification among WIC participants early in the COVID-19 pandemic. DESIGN: Cross-sectional survey with administrative data for follow-up PARTICIPANTS AND SETTING: This study used data from the 2020 LAC WIC Survey and WIC administrative data to evaluate remote service utilization across LAC WIC agencies (unweighted n = 3,510; weighted n = 3,540). MAIN OUTCOME MEASURES: Recertification on WIC, determined by the issuance of a food package in the first 2 months after the end-date of the prior certification period. STATISTICAL ANALYSIS: Survey data were merged to WIC administrative data to determine whether participants completed a recertification; the association of utilization of each remote service with the odds of recertification among WIC-participating children 0 to 3 years of age was assessed with multivariable logistic regression. RESULTS: Most survey respondents reported using phone appointments (95.5%), interactive texting (77.3%), e-mail (60.1%), and online education (71.2%) to access WIC services during 2020, and over 82% of children successfully recertified. Interactive texting utilization was associated with 27% higher recertification odds (95% confidence interval, 1%-59%); associations between all other remote services and odds of recertification were not statistically significant. CONCLUSIONS: These results suggest that WIC investment in interactive texting technological infrastructure, and appropriate staff training, can help local WIC agencies successfully reach and provide high-quality services to WIC participants.

Racial and Ethnic Comparisons in Satisfaction with Services Provided by the Special Supplemental Nutrition Program for Women, Infants, and Children in California.

Understanding satisfaction of nutrition education and other services provided in the Special Supplemental Nutrition Program for Women, Infants and Children (WIC) is needed to ensure the program is responsive to the needs of diverse populations. This study examined the variation of WIC participants' perceptions and satisfaction with WIC nutrition education and services by race, ethnicity, and language preference. Phone surveys were conducted in 2019 with California WIC families with children aged 1−4 years. While most participants (86%) preferred one-on-one nutrition education, online/mobile apps were also favored (69%). The majority (89%) found nutrition education equally important to receiving the WIC food package. Racial/ethnic groups differed in which WIC service they primarily valued as 20% of non-Hispanic White people rated the food package as more important than nutrition education compared to 5% of Spanish- and 6% of English-speaking Hispanic people, respectively. More Spanish (91%) and English-speaking Hispanic people (87%) than non-Hispanic white (79%) or Black people (74%) changed a behavior because of something they learned at WIC (p < 0.001). Spanish-speaking Hispanic people (90%) had the highest satisfaction with WIC nutrition education. Preferential differences among participants suggest that providing flexible options may improve program satisfaction and emphasizes the need for future studies to examine WIC services by race and ethnicity.

Prevalence and Predictors of Substantial Postpartum Weight Retention Among Participants of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) in Southern California.

PURPOSE: Identify the prevalence and predictors of substantial postpartum weight retention (SPPWR) among WIC mothers in Southern California during their first postpartum year. DESIGN: Secondary data analysis. SETTING: The 2020 Los Angeles County WIC Survey. SUBJECTS: Mothers of children up to 1-year-old (N = 1019). MEASURES: Outcome variable: SPPWR (≥5 kg above pre-pregnancy weight). Predictors: child's age, mother's age, race, education, employment status since having child, healthcare coverage, food insecurity, depressed mood, instrumental support, emotional support, spouse's participation in child's life, gestational weight gain (GWG), pre-pregnancy BMI, any breastfeeding, and gestational diabetes. ANALYSIS: Weighted descriptive statistics and binary logistic regression. RESULTS: The prevalence of SPPWR was 31%. We found that for every 1 month increase in the child's age (proxy for postpartum duration), the likelihood of SPPWR increased by 9% (AOR = 1.09, CI = 1.04-1.15). Mothers were more likely to have SPPWR when they exceeded GWG guidelines (AOR = 3.43, CI = 2.46-4.79). Compared to mothers with normal pre-pregnancy BMIs, mothers with overweight (AOR = .64, CI = .44-.94) and obese (AOR = .39, CI = .26-.58) pre-pregnancy BMIs were less likely to experience SPPWR. CONCLUSION: Postpartum duration and maternal anthropometric characteristics were associated with SPPWR during the first postpartum year. Extending WIC eligibility for postpartum mothers to 2 years through the Wise Investment in Children Act may give WIC providers the opportunity to work closely with Southern California WIC mothers to achieve a healthy weight after pregnancy.

The COVID-19 Pandemic Contributed to Disparities in Housing-Cost Burden Among WIC-Participating Households in the Most Populous County in California.

Affordable housing is necessary for the health and well-being of children and families. The coronavirus disease 2019 (COVID-19) pandemic affected the ability of low-income families to pay for housing. The aim of this study is to evaluate associations between household characteristics of participants of the Special Supplemental Nutrition Program for Women, Infants and Children (WIC), and housing-cost burden during the pandemic. WIC is a federally-funded nutrition assistance program for low-income mothers, infants, and children up to the age of 5. Data were from a 2020 survey of a random sample of WIC households (n = 5815) in Los Angeles County. Ordinal logistic regression determined the odds of being housing-cost burdened by parent respondent's race/ethnicity, household composition, employment, residence, and housing cost. Logistic regression determined if the pandemic contributed to the housing-cost burden. A total of 61% of households reported housing-cost burden, with two-thirds attributing the burden to the pandemic. Spanish-speaking Hispanic parents and white parents reported a higher prevalence of pandemic-related burden, while Asian, Black, and English-speaking Hispanic parents reported a higher prevalence of burden unrelated to the pandemic. Single-parent households, those experiencing residential instability, and those with high housing costs had higher odds of burden. Spanish-speaking Hispanic parents, white parents, homeowners, and those with high housing costs were more likely to attribute the burden to the pandemic. To ensure that existing inequities are not exacerbated, it is vital that housing assistance be available to low-income households that were disproportionately affected by the pandemic.

Changes in frequency of park/playground utilization among children aged 4-59 months in Los Angeles County, California 2008-2020.

Child physical activity and play are critical for healthy development, and parks/playgrounds are important public spaces that provide physical activity/play opportunities. This study was conducted to assess changes in park/playground utilization by Special Supplemental Nutrition Program for Women, Infants and Children (WIC)-participating children from 2008 to 2020, and whether the COVID-19 pandemic was associated with lower park/playground utilization and racial/ethnic disparities in park/playground utilization. Cross-sectional data from the 2008-2020 triennial Los Angeles County WIC Survey (n = 21,886) were used, and analyses stratified by child age (4-23 months, 24-59 months). Odds ratios (OR) and 95 % confidence intervals (CI) for the relationship between year and park/playground utilization frequency were determined from multinomial logistic regression, and racial/ethnic disparities were assessed by interacting year with race/ethnicity. Among children 24-59 months of age, park/playground utilization increased compared to never from 2011 to 2017 compared to 2008 (Every day, 2011-2017: OR [95 % CI]: 2.69 [1.93, 3.75], 4.71 [3.23, 6.86], 10.20 [6.91, 15.06]; 3-6 days/week 2011-2017: 1.54 [1.13, 2.10], 3.11 [2.18, 4.45], 3.94 [2.71, 5.72]; 1-2 days/week, 2014-2017; 1.53 [1.08, 2.18], 1.63 [1.13, 2.37]). Associations reversed in 2020, with 36 % lower odds of every day (OR [95 % CI]: 0.64 [0.48, 0.85]), 85 % lower odds of 3-6 days/week (0.15 [0.11, 0.20]) and 89 % lower odds of 1-2 days/week (0.11 [0.09, 0.15]) park/playground utilization compared to never than in 2008. Park/playground utilization frequency increased from 2008 to 2017, but progress reversed during the COVID-19 pandemic in 2020. Results for children ages 4-23 months were similar. Future public health restrictions to public recreation facilities should consider realistic limitations to potential benefits and the potential for unintended consequences before implementation.

California WIC Participants Report Favorable Impacts of the COVID-Related Increase to the WIC Cash Value Benefit.

The United States Department of Agriculture approved an increase to the Cash Value Benefit (CVB) for the purchase of fruits and vegetables issued to participants receiving an eligible Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food package. In order to understand satisfaction, perceptions, and the overall impact of additional benefits for fruits and vegetables at the household level, a qualitative study consisting of structured phone interviews was conducted with families served by WIC in Southern California from November to December 2021 (n = 30). Families were selected from a large longitudinal study sample (N = 2784); the sample was restricted by benefit redemption and stratified by language and race. WIC participants were highly satisfied with the CVB increase, reporting increased purchasing and consumption of a variety of fruits and vegetables. Respondents noted the improved quality and variety of fruits and vegetables purchased due to the increased amount. Findings are expected to inform policy makers to adjust the CVB offered in the WIC food package with the potential to improve participant satisfaction and increase participation and retention of eligible families with benefits from healthy diets supported by WIC.

Lactose-reduced infant formula with corn syrup solids and obesity risk among participants in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC).

BACKGROUND: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), a federal nutrition assistance program supporting low-income families, serves half of United States-born infants, most of whom are issued infant formula by age 2 mo. Obesity prevalence is high among children of low-income households, particularly formula-fed children. OBJECTIVES: This study was conducted to determine whether glucose-based lactose-reduced infant formula made with corn syrup solids (CSSF) is associated with increased obesity risk compared with non-CSSFs that are lactose based. DESIGN: WIC administrative data on infant formula issuance and child weights and lengths were collected prospectively in Southern California between 2012 and 2020. Included children stopped breastfeeding by 3 mo, were issued cow's milk-based formula through 12 mo, and were enrolled through the final year of WIC eligibility at age 4 y ( n = 15,246). CSSF issuance was assessed continuously (range 0-13 mo) and dichotomously (any, none). Poisson and linear risk regression with robust SE estimates generated risk ratios (RRs), risk differences, and CIs for child obesity [BMI for age (in kg/m 2) ≥95th percentile]. RESULTS: Any CSSF was issued to 23% of children, and 25% were obese at age 4 y. Children with any CSSF issuance had 10% higher obesity risk (RR: 1.10; 95% CI: 1.02, 1.20) than children with no CSSF issuance at age 2 y. Associations remained significant through age 4 y (RR: 1.07; 95% CI: 1.01,1.14), independent of maternal weight status, total formula issued and breastfeeding duration, and were not modified by child race or sex. Obesity risk increased with additional mo of CSSF exposure, reaching 16% higher risk (RR: 1.16; 95% CI: 1.05, 1.28) at age 2 y for children with 12 mo of CSSF. CONCLUSIONS: CSSF issuance is associated with increased obesity risk in the first 5 y life in a dose dependent manner, independently of maternal weight status, breastfeeding duration, and total formula issuance.

A Qualitative Examination of California WIC Participants' and Local Agency Directors' Experiences during the Coronavirus Disease 2019 Pandemic.

BACKGROUND: The US Department of Agriculture granted waivers to allow flexibility in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) operations during the coronavirus disease 2019 (COVID-19) pandemic; however, research examining the associations between waiver introduction and changes in perceptions, practices, and challenges of WIC participants' and agency directors' experiences is limited. OBJECTIVE: The objective of this study was to assess California WIC participants' and agency directors' perceptions and practices of remote WIC services during the COVID-19 pandemic. A secondary aim was to understand other COVID-19 challenges related to maintaining access to healthy foods by WIC participants. DESIGN: A qualitative study that included semistructured interviews was conducted between June 2020 and March 2021. PARTICIPANTS AND SETTING: One hundred eighty-two WIC participants with a child aged 0 to 5 years from three regions of California (Southern, Central, and Northern) and 22 local WIC agency directors across the state were interviewed. MAIN OUTCOME MEASURES: WIC participants' and agency directors' perceptions, practices, and other challenges during COVID-19. STATISTICAL ANALYSES PERFORMED: Interviews were recorded, transcribed, and analyzed using a grounded theory approach. RESULTS: Participants shared that they valued the information received from WIC and were very satisfied with remote WIC services. Participants reported that enrolling in WIC remotely was easier than coming in person. All waivers and changes to WIC operations, namely the physical presence, remote benefit issuance, and separation of duties waivers, and remote work and remote delivery of nutrition education, were largely viewed by WIC agency directors as options that should be continued postpandemic. Further, a majority (63%) of households reported experiencing food insecurity, and half of respondents received food from a food bank or pantry during the pandemic. CONCLUSIONS: Findings suggest WIC will attract and retain the most families by offering a hybrid model of services, incorporating both onsite services and remote options to work more efficiently and effectively.

Longer Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) Participation Duration Is Associated with Higher Diet Quality at Age 5 Years.

BACKGROUND: The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides supplemental healthy foods and nutrition education to children under age 5 y in low-income households. OBJECTIVES: We aimed to identify characteristics associated with duration of WIC participation and assess how participation duration relates to household food insecurity (HFI), child diet quality, and child weight status at age 60 mo. METHODS: This analysis of the WIC Infant and Toddler Feeding Practices Study-2, a prospective cohort of WIC-participating children enrolled in 2013, included children with complete baseline-60 mo data (n = 836). Outcomes assessed with WIC participation duration in multivariable regression were HFI (USDA 6-item Household Food Security Screener), child diet quality on a given day [Healthy Eating Index (HEI)-2015], and obesity (CDC BMI-for-age ≥95th percentile). RESULTS: Factors associated with longer WIC participation included male sex; lower household income; reported diet changes in response to WIC nutrition education; household Supplemental Nutrition Assistance Program participation; English-speaking Hispanic, Spanish-speaking Hispanic, and non-Hispanic other maternal race-ethnicity and language preference; an ever-married mother; lower maternal education; higher maternal age; earlier enrollment during pregnancy; and reporting a subsequent pregnancy. Longer WIC participation was associated with lower HFI odds (OR: 0.69; 95% CI: 0.51, 0.95), higher total HEI-2015 (ß: 0.73; 95% CI: 0.20, 1.25), and higher obesity odds (OR: 1.20; 95% CI: 1.05, 1.37) in multivariable-adjusted regression models. CONCLUSIONS: Longer WIC participation was associated with reduced HFI and higher diet quality, and unexpectedly with higher obesity odds, at 60 mo. Further research is needed to confirm and understand mechanisms underlying the unexpected associations identified with longer WIC participation (e.g., male sex, obesity). Groups with shorter participation durations may benefit from targeted WIC retention efforts to maximize nutrition security.

The Relationship between Breastfeeding and Initial Vegetable Introduction with Vegetable Consumption in a National Cohort of Children Ages 1-5 Years from Low-Income Households.

Compared to other food groups, vegetable intakes are lowest relative to recommendations. Breastfeeding and initial introduction to vegetables may help infants establish long-lasting taste preferences. We examined the relationship between breastfeeding and initial vegetable introduction and vegetable intake in early childhood (ages 13-60 months). This repeated cross-sectional study used data from the national WIC Infant and Toddler Feeding Practices Study-2 collected from low-income mother/caregivers about infants from around birth through age 5 (60 months; n = 3773). Survey-weighted adjusted regression models assessed associations between breastfeeding and vegetable introduction measures with vegetable consumption at child ages 13, 24, 36, 48, and 60 months. Longer breastfeeding duration was associated with a slightly, but significantly, greater variety of vegetables consumed/day in early childhood. There was also a small but positive statistically significant association between the number of different types of vegetables consumed on a given day at 9 months and the amount and variety of vegetables consumed/day in early childhood. Age of initial vegetables introduction and whether vegetables were the first/second food introduced were not consistently related to the amount or variety of vegetables consumed later in childhood. Longer breastfeeding and introduction to a greater variety of vegetables at 9 months may be behaviors to target to increase consumption of a greater variety of vegetables by young children.