A Holistic Picture of the Relationships Between Dietary Intake and Physical and Behavioral Health in Youth with Type 1 Diabetes Mellitus: A Pilot Study

Background/Objectives: Youth with type 1 diabetes (T1DM) face unique challenges in balancing dietary choices, physical health outcomes, and social–emotional well-being in school settings. This cross-sectional exploratory pilot study examined the associations of diet with physical health and teacher-reported social–emotional functioning in students with T1DM. Methods: Students with T1DM (mean age = 13.42; 47 female, 50 male; 50% White, Non-Hispanic, 50% minority) self-reported their nutritional habits using the KBlock Dietary Screener for Children when school was in session. Teacher-rated school-related behaviors were assessed through the Behavior Assessment Scale for Children-2nd Edition (BASC-2). Canonical correlation analysis was conducted to determine whether the variable sets (diet with physical health and school-related behavioral health) shared a significant multivariate relationship. Results: Youth with lower glycemic loads and consuming more sugar, dairy, and meat/poultry/fish but fewer legumes, fruit, and less saturated fat exhibited fewer externalizing symptoms and higher BMI. Diet uniquely accounted for modest variance in combined social–emotional and physical health, controlling for demographics and T1DM duration. Findings support increasing the availability of whole, nutrient-rich foods, integrating comprehensive nutrition education into curricula, and ensuring access for all students, regardless of socioeconomic status. Conclusions: Comprehensive dietary assessments and school-based randomized control trials are needed to enact more evidence-based dietary recommendations or interventions for youth, aiming for a balanced approach that addresses both mental and physical health outcomes.