Association between kindergarten and first-grade food insecurity and weight status in U.S. children

Area of Science:

• Pediatric Health
• Nutrition Science
• Public Health

Background:

• Childhood obesity is a significant public health issue in the U.S.
• Food insecurity, defined as the lack of consistent access to enough food for an active, healthy life, is a growing concern.
• Understanding the determinants of childhood obesity is crucial for developing effective interventions.

Purpose of the Study:

• To investigate whether food insecurity is an independent risk factor for obesity in U.S. children.
• To examine the longitudinal association between food security status and body mass index (BMI) z-score from kindergarten through third grade.
• To identify potential differences in this association based on the timing of food insecurity (kindergarten vs. first grade).

Main Methods:

• Analysis of a nationally representative sample of 8167 U.S. children from the Early Childhood Longitudinal Study-Kindergarten Cohort 2011.
• Longitudinal evaluation of associations between food security and BMI z-score, controlling for race/ethnicity, household income, and parental education.
• Weighted statistical analyses using survey and anthropometric data collected from kindergarten through third grade.

Main Results:

• Children experiencing household food insecurity exhibited higher obesity prevalence from kindergarten through third grade.
• First-grade food insecurity was significantly correlated with increased BMI z-score in first through third grades (e.g., first grade: 0.6 vs. 0.4).
• First-grade food insecurity was associated with a 1.4-fold increased risk for obesity in that grade (95% CI, 1.1-2).

Conclusions:

• Obesity is demonstrably more prevalent among food-insecure children.
• Food insecurity in first grade serves as an independent risk factor for sustained increases in BMI z-score.
• The relationship between food insecurity and weight status shows distinct patterns between kindergarten and first grade.