Peer-reviewed article
Infant Diet Quality and Federal Nutrition Assistance Program Participation Predict Later Diet Quality in United States Children 2-5 Years Old.
Domfe CA, Arnold CD, Frongillo EA, Ritchie LD, Whaley SE et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This study followed over 3,000 US children from birth to age 5 to examine how infant diet quality and participation in federal nutrition assistance programs (WIC, SNAP, Medicaid) affect later diet quality and weight. Children who consistently participated in WIC had better diets at ages 2-5 compared to those with sporadic participation. Children in households receiving SNAP had lower diet quality scores, though infant diet quality partially explained this difference. Medicaid participation was not associated with diet quality or weight outcomes.
Key points
- Consistent WIC participation from infancy through age 5 was associated with higher diet quality scores in children aged 2-5 years
- SNAP participation was associated with lower diet quality scores at most ages, with infant diet quality explaining 15-30% of this difference
- Infant Diet Quality Index at age 2 partially mediated the relationship between WIC participation and later diet quality
- Medicaid participation showed no association with child diet quality or weight status
- Authors recommend improving dietary exposures during the first year through nutrition support services and caregiver education
Limitations
The study is observational and cannot establish causation; program participation patterns are complex and families may differ systematically in ways not fully captured by the analysis. The mediation effects were modest, suggesting infant diet quality explains only a portion of the observed associations.
Abstract
Background Infant diet quality has been associated with early childhood dietary behaviors and nutritional outcomes. For United States children in low-income households, programs such as the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), the Supplemental Nutrition Assistance Program (SNAP), and Medicaid provide benefits to improve health outcomes. Examining the role of dietary exposures during infancy is important to understand how duration in these programs is associated with childhood diet quality and weight status. Objectives This study aimed to examine whether infant nutrition, measured by the Infant Diet Quality Index (IDQI) and participation duration in WIC, SNAP, and Medicaid, is associated with child diet quality [Healthy Eating Index-2020 (HEI-2020)] and weight status (body mass index z-scores) from 2 to 5 y. Methods Data analyzed were from the WIC Infant and Toddler Feeding Practices Study-2, a national cohort of children followed from around birth up to 9 y (unweighted n = 3051; weighted n = 413,211). Associations between the durations of program participation were estimated with each outcome in survey-weighted multivariable regression analyses; mediation through IDQI was assessed using causal mediation. Results Children who consistently participated in WIC through age 5 had higher HEI-2020 scores than those who were sporadically on WIC, with modest mediation by IDQI at 2 y only (P < 0.10). Children in households with any SNAP participation had lower HEI-2020 scores at most ages compared with those never on SNAP, and differences were mediated by having lower IDQI, which explained ≤23%, 30%, and 15% of the differences in HEI-2020, HEI-2020 adequacy, and HEI-2020 moderation scores, respectively (P < 0.05) at 2-5 y. Medicaid was not associated with any outcome. Conclusions Supporting improved dietary exposures during the first year of life through the provision of nutrition support services and caregiver nutrition education may be effective at improving later nutritional outcomes among children, particularly among those participating in SNAP.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- Participation in federal nutrition assistance programs (WIC, SNAP, Medicaid) combined with improved infant diet quality through nutrition support services and caregiver education
- Population
- US children from low-income households followed from birth to age 5 (n=3,051 unweighted; n=413,211 weighted)
Key finding
Children with consistent WIC participation had higher HEI-2020 diet quality scores than those with sporadic participation, with modest mediation by infant diet quality at age 2 (P<0.10)