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1347 Body Composition at 32–36 Weeks Corrected Age in Infants Born Before 32 Weeks Gestation
  1. MB Cumin1,
  2. T Donovan2,
  3. PB Colditz1,
  4. BE Lingwood1
  1. 1University of Queensland Centre for Clinical Research, The University of Queensland
  2. 2Grantley Stable Neonatal Unit, Royal Brisbane and Women’s Hospital, Herston, QLD, Australia

Abstract

Background Preterm infants at term equivalent age are smaller than full term infants with a higher fat mass. The aim of this study was to determine if alterations in adiposity are already evident at 32–36 weeks corrected age (CA).

Methods Preterm babies (n=21) born before 32 weeks gestation were studied between 32 and 36 weeks CA using the PEAPOD Infant Body Composition System to assess % body fat. The data were compared with a second group of babies (n=17) born at 32–36 weeks gestation.

Results Mean % body fat at 32–36w CA in infants born < 32w was 14.1±5.8 (mean ± SD) and this was significantly higher than % body fat in infants born at 32–36 weeks (7.9±4.5, P<0.01). Mean % body fat at 32–36 weeks in infants born < 32w was also significantly higher than % fat at birth in infants born at term (10.1±4.1, P<0.05). % body fat in infants born < 32w was positively correlated (R=0.59, P<0.05) with post-natal age at measurement suggesting that longer periods of ex utero nutrition result in greater increases on % body fat. % body fat in infants born < 32w was also positively correlated with weight at the time of measurement (R=0.56, P<0.01) and there was a tendency for those babies who had gained weight most rapidly since birth to have higher % fat.

Conclusion % body fat in infants born < 32 weeks is elevated by 32–36 weeks CA.

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