Insulin sensitivity at childhood predicts changes in total and central adiposity over a 6-year period

Area of Science:

• Pediatric Endocrinology
• Metabolic Health
• Obesity Research

Background:

• Insulin resistance in childhood is a growing concern with potential long-term health implications.
• Understanding early predictors of adiposity is crucial for effective obesity prevention strategies.
• The European Youth Heart Study provides a valuable cohort for investigating childhood metabolic health.

Purpose of the Study:

• To investigate the association between childhood insulin resistance and subsequent changes in adiposity over a six-year period.
• To determine if early markers of insulin resistance predict adolescent body composition.
• To explore the predictive value of insulin sensitivity for total and central adiposity gain.

Main Methods:

• Longitudinal study of 659 children (ages 9-15) from Sweden and Estonia.
• Measurements included weight, height, skinfolds, waist circumference, and calculated BMI, sum of skinfolds, and body fat percentage.
• Fasting glucose and insulin were measured to calculate homeostasis model assessment of insulin resistance (HOMA-IR); puberty stage, sex, and center were used as confounders.

Main Results:

• Childhood HOMA-IR was significantly associated with increased BMI, sum of skinfolds, body fat percentage, and waist circumference from age 9 to 15.
• These associations remained significant even after excluding overweight children.
• Childhood adiposity measures did not predict changes in HOMA-IR over the study period.

Conclusions:

• Lower insulin sensitivity in childhood is a significant predictor of increased total and central adiposity during adolescence.
• These findings underscore the importance of targeting insulin sensitivity for early obesity prevention efforts.
• Interventions aimed at improving insulin sensitivity in early life may mitigate adolescent adiposity gain.