Neonatal Length Growth and Height at Two Years

Area of Science:

• Pediatrics
• Neonatology
• Growth and Development

Background:

• Birth length predicts adult height, but neonatal length growth's impact on early childhood height is less understood.
• Preterm infants (<35 weeks gestational age) face unique growth challenges during neonatal hospitalization.

Purpose of the Study:

• To investigate the association between length growth during neonatal hospitalization and attained height at two years in preterm infants.
• To determine if neonatal length changes predict later growth outcomes in this vulnerable population.

Main Methods:

• A cohort of 1,760 preterm infants (<35 weeks gestational age) was analyzed.
• Neonatal length growth was quantified using the difference in Z-scores (Olsen curves) from birth to discharge.
• Statistical models (odds ratios) were used to assess the risk of being in the lowest height quintile at two years.

Main Results:

• Both birth length and neonatal length growth were positively associated with height at two years (p < 0.001).
• Birth length and neonatal length growth showed an inverse correlation (p < 0.001).
• Reduced neonatal length growth significantly increased the risk of being shorter at two years (adjusted OR = 0.66).

Conclusions:

• Neonatal length growth is an independent predictor of height at two years in preterm infants, alongside birth length.
• Emphasizes the importance of monitoring infant length during neonatal stays.
• Suggests early intervention strategies for preterm infants experiencing suboptimal length growth during hospitalization.