Body height in paediatric inflammatory bowel diseases: A structural equation model analysis

Area of Science:

• Pediatric Gastroenterology
• Endocrinology
• Growth and Development

Background:

• Linear growth restriction is a hallmark of pediatric inflammatory bowel diseases (IBD).
• Reduced insulin-like growth factor-1 (IGF-1) is a primary contributor to short stature in these children.

Purpose of the Study:

• To investigate the factors influencing somatic height in children with IBD.
• To assess the direct and indirect effects of disease-related, inflammatory, and endocrine parameters on height, with a focus on IGF-1 mediation.

Main Methods:

• Retrospective, cross-sectional study design.
• Analysis of anthropometric data, disease factors, inflammation markers (e.g., IL-6), and endocrine parameters.
• Structural equation modeling to assess direct and mediated associations with somatic height.

Main Results:

• Systemic inflammation (IL-6) and nutritional status (BMI) significantly impacted height by reducing IGF-1.
• Cortisol demonstrated a direct, positive association with height, independent of IGF-1.
• These findings highlight the complex interplay of factors affecting growth in pediatric IBD.

Conclusions:

• IGF-1 is a critical mediator in impaired linear growth associated with pediatric IBD.
• Malnutrition and systemic inflammation restrict growth by lowering circulating IGF-1 levels.
• The positive correlation between serum cortisol and height may reflect a suppressed pituitary-adrenal axis due to glucocorticoid therapy.