Insights into infancy weight gain patterns for term small-for-gestational-age babies

Area of Science:

• Pediatrics
• Growth and Development
• Public Health

Background:

• Infant weight gain patterns significantly impact long-term health.
• Term small-for-gestational-age (SGA) infants require specific growth monitoring.
• Deviations from optimal growth trajectories can lead to adverse health outcomes.

Purpose of the Study:

• To identify distinct infant weight gain patterns in term SGA infants.
• To determine the optimal weight gain trajectory for term SGA infants during the first two years of life.
• To associate identified weight gain patterns with later childhood health outcomes.

Main Methods:

• Latent class growth analysis (LCGA) was used to classify weight gain patterns.
• Data from 3004 term SGA infants in Shanghai, China (2004-2010) were analyzed.
• Mixed-effects regression and multivariable regression examined BMI curves and adverse outcomes.

Main Results:

• Five distinct weight gain patterns were identified, ranging from excessively rapid to almost no catch-up growth.
• Rapid catch-up growth (Classes 1 & 2) was associated with increased BMI and higher risk of overweight/obesity.
• Slow or no catch-up growth (Classes 4 & 5) was linked to a prominent risk of malnutrition.

Conclusions:

• Optimal catch-up growth for term SGA infants involves crossing two centile levels within months.
• Maintaining growth at a median level by age two is crucial for minimizing health risks.
• This specific trajectory helps mitigate risks of overweight, obesity, and malnutrition in childhood.