Abstract
Objective The primary aim of this study was to evaluate the association between 25-hydroxyvitamin
D (25OHD) concentration at birth and the short-term outcomes in neonatal hypoxic–ischemic
encephalopathy (HIE). Our secondary aim was to evaluate the effect of postnatal vitamin
D supplementation on outcomes in the perinatal period after hypoxic injury.
Study Design This retrospective cohort study included all infants ≥35 weeks gestation admitted
to a regional level IV neonatal intensive care unit and diagnosed with moderate or
severe HIE. Spearman correlation coefficients were used to evaluate associations between
clinical outcomes including standardized brain magnetic resonance imaging (MRI) scores
and either 25OHD concentrations in the first 48 hours of life or total vitamin D supplementation.
Result A total of 43 infants met inclusion criteria; 22 had 25OHD concentrations drawn within
the first 48 hours. There was a significant inverse association between 25OHD concentration
and brain injury on MRI (p = 0.017). There was a trend toward decreased ventilator days in infants receiving
higher doses of vitamin D in the first week of life (p = 0.062), but there was no association between vitamin D dosing and MRI injury.
Conclusion These results support an association between lower vitamin-D levels and early adverse
outcomes in HIE, including radiographic severity of brain injury.
Keywords
25-hydroxyvitamin D - magnetic resonance imaging - outcomes