Excess BMI in Childhood: A Modifiable Risk Factor for Type 1 Diabetes Development?

Area of Science:

• Pediatric Endocrinology
• Metabolic Disorders
• Diabetes Research

Background:

• Type 1 diabetes is an autoimmune disease affecting children and adolescents.
• Elevated Body Mass Index (BMI) is a growing concern in pediatric populations.
• Understanding risk factors for type 1 diabetes progression is crucial for early intervention.

Purpose of the Study:

• To investigate the longitudinal impact of elevated Body Mass Index (BMI) on type 1 diabetes progression in youth.
• To identify specific BMI thresholds associated with increased type 1 diabetes risk.
• To explore age- and sex-specific differences in the relationship between BMI and type 1 diabetes progression.

Main Methods:

• Analysis of 1,117 children from the TrialNet Pathway to Prevention cohort (autoantibody-positive relatives).
• Calculation of cumulative excess BMI (ceBMI) based on longitudinally accumulated BMI above the 85th percentile.
• Application of recursive partitioning and multivariate analyses to determine sex- and age-specific ceBMI thresholds.

Main Results:

• Higher cumulative excess BMI (ceBMI) significantly correlated with increased risk of type 1 diabetes progression.
• Lower ceBMI values were associated with greater diabetes risk in children younger than 12 years compared to older children.
• Females exhibited a higher risk of diabetes progression at lower ceBMI values compared to males.

Conclusions:

• Elevated BMI is a significant risk factor for type 1 diabetes progression in pediatric individuals with autoantibodies.
• The association between BMI and type 1 diabetes risk is modulated by age and sex.
• Monitoring BMI in at-risk pediatric populations is essential for predicting and potentially mitigating type 1 diabetes progression.