Abstract
Objective
To evaluate vitamin D inadequacy among extremely low-birth-weight (ELBW, <1000 g) infants and the association between circulating vitamin D concentrations and perinatal–neonatal outcomes.
Study design
Prospective cohort study of ELBW infants in the neonatal ICU. Blood was collected within the first 3 days after birth after obtaining informed consent. Circulating 25-hydroxyvitamin D concentrations (25(OH)D) were quantified using liquid chromatography–tandem mass spectroscopy and classified as vitamin D deficient, insufficient, or adequate ( < 20, 20–30, or > 30 ng/mL, respectively). Associations between 25(OH)D and perinatal–neonatal outcomes were determined by multivariable regression, adjusted for covariates that differ in the bivariate analysis.
Results
Of the 60 ELBW infants enrolled, 13 (22%) were vitamin D deficient, 15 (25%) were insufficient, and 32 (53%) were adequate. 25(OH)D levels were positively associated with fetal growth restriction and prolonged rupture of the membranes.
Conclusions
Vitamin D inadequacy was frequent among ELBW infants. Circulating vitamin D concentrations were significantly associated with perinatal outcomes in this contemporary cohort.
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Acknowledgements
We acknowledge Itsuka Kurihara and Alison Migliori at the Women and Infants Hospital of Rhode Island for assistance in data collection, and Drs. Marilyn Escobedo and Rita Raman at the University of Oklahoma for their assistance.
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The authors declare that they have no conflict of interest.
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Portions of the study were presented at the annual meeting of the Pediatric Academic Societies, San Francisco, CA, May 6–9 2017.
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Shah, B.A., Padbury, J.F., Anderson, M.P. et al. Vitamin D and associated perinatal–neonatal outcomes among extremely low-birth-weight infants. J Perinatol 38, 1318–1323 (2018). https://doi.org/10.1038/s41372-018-0203-y
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DOI: https://doi.org/10.1038/s41372-018-0203-y