Energy intake variability in free-living young children

Area of Science:

• Pediatric Nutrition
• Human Physiology
• Behavioral Science

Background:

• Previous research suggested young children closely regulate daily energy intake.
• This hypothesis was based on a small experimental study (n=15) reporting low day-to-day energy intake variation (CV=10.4%).

Purpose of the Study:

• To test the hypothesis of stable day-to-day energy intake in free-living young children.
• To assess intra-individual variation in energy consumption in a real-world setting.

Main Methods:

• A sample of 101 free-living children (aged 2.6-6.8 years) from Glasgow, Scotland, was studied.
• Energy intake was measured using multiple-pass 24-hour dietary recalls.
• Within-subject coefficient of variation (CV) in daily energy intake was calculated.

Main Results:

• The study found a significantly higher within-subject CV of 19.2% in free-living children.
• This variation was substantially greater than the 10.4% reported in prior experimental research (p<0.0001).
• Four additional studies on free-living children reported similar high variations (CVs 16.1-28.7%).

Conclusions:

• Young children exhibit considerable day-to-day variation in energy intake in free-living environments.
• The assumption of tight energy intake regulation in young children may not hold true in natural settings.
• Further research is needed to understand the factors influencing energy intake variability in pediatric populations.