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Endosteal bone storage in young adults born small for gestational age - a study using peripheral quantitative

Stephanie Putzker1, Robert Dalla Pozza, Hans Peter Schwarz

  • 1Division of Pediatric Endocrinology and Diabetology, University Children's Hospital, Ludwig-Maximilians University, Munich, Germany.

Clinical Endocrinology
|September 13, 2011
PubMed

Insights

Young adults born small for gestational age (SGA) exhibit normal bone density but altered bone geometry, with a smaller medullary cavity. Very low birth weight in SGA individuals may compromise bone development, impacting future bone stability.

Area of Science:

  • Human Physiology
  • Bone Biology
  • Developmental Pediatrics

Background:

  • Poor early-life growth is linked to reduced bone mass and adverse health outcomes.
  • Small for gestational age (SGA) birth is a significant indicator of early-life growth restriction.

Purpose of the Study:

  • To investigate bone and body composition in young adults born SGA.
  • To assess the long-term skeletal effects of SGA birth.

Main Methods:

  • Observational study involving 76 young adults born SGA (mean age 19.68 years).
  • Peripheral quantitative computed tomography (pQCT) used to analyze bone mineral density (BMD), bone geometry, and body composition.
  • Statistical analysis included z-score comparisons and correlation analyses.

Main Results:

  • SGA adults showed lower height, weight, BMI, and fat cross-sectional area (CSA) z-scores compared to controls.
  • Trabecular and cortical BMD z-scores were normal.
  • Height-corrected analysis revealed normal total and muscle CSA but a reduced medullary cavity in SGA adults.
  • Individuals with birth weight ≤ 1500 g had further reduced height-corrected medullary cavity and total bone CSA.
  • Early childhood BMI correlated with adult medullary cavity and total bone CSA.

Conclusions:

  • Early environmental factors influence adult bone geometry in SGA individuals.
  • Young adults born SGA have normal total bone size but a smaller medullary cavity.
  • Very low birth weight in SGA is associated with compromised bone size development, potentially affecting long-term bone stability.
Abstract

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