Establishing Reference Values for Lean Muscle Mass in the Pediatric Patient

Area of Science:

• Pediatric imaging analysis
• Body composition assessment
• Sarcopenia research

Background:

• Decreased muscle mass in adults is linked to adverse outcomes.
• The impact of sarcopenia on children is not well understood.
• Establishing pediatric lean muscle mass norms is essential for future research.

Purpose of the Study:

• To define reference values for lean muscle mass in healthy children.
• To facilitate future studies on sarcopenia's effects in pediatric populations.
• To create gender- and age-specific charts for psoas muscle area and index.

Main Methods:

• Computed tomography (CT) scans of bilateral psoas muscles were analyzed.
• Pearson correlation coefficients assessed relationships between muscle area and patient factors.
• Quantile regression generated age- and sex-specific percentile curves.

Main Results:

• Analysis included 782 children (63.1% male; median age 9.3 years).
• Psoas muscle area showed strong correlations with age, height, and weight in both genders.
• Gender-specific reference charts for psoas muscle area and index were developed.

Conclusions:

• Gender-specific reference charts for pediatric psoas muscle area are now available.
• These charts provide a baseline for assessing lean muscle mass in children.
• This work supports future investigations into pediatric sarcopenia and its clinical impact.