title: Baseline serum magnesium concentrations and neurodevelopmental outcomes of extremely low birth weight premature infants.
abstract: OBJECTIVE
  To test the hypothesis that, in ELBW infants who did not receive antenatal MgSO4, lower baseline serum Mg is associated with poorer neurodevelopmental outcomes (NDO).
  
  
  METHODS
  The study was conducted in two phases: phase 1-- retrospective, and phase 2--prospective.
  
  
  METHODS
  Extremely low birth weight infants.
  
  
  METHODS
  Mortality and adverse NDO were assessed in relation to initial serum Mg measured in the first 12 hours of age.
  
  
  RESULTS
  We studied 156 ELBW infants. In phase 1 (n=102): initial serum Mg (median [IQ range]) was greater in the infants who died compared to those who survived (1.7 [1.5-2.2] mg/dL vs. 1.6 [1.4-1.7] mg/dL, p=0.034). In phase 2 (n=54): initial serum Mg was greater in infants who died or had adverse NDO at 9 months when compared to those who survived with better NDO (1.7 [1.55-2.1] mg/dL vs. 1.5 [1.4-1.68] mg/dL, p=0.008). Using receiver operating characteristic (ROC) curve, increased Mg concentration in the first 12 hours>1.6 mg/dL was associated with unfavorable outcomes with sensitivity of 73%, specificity of 67%, and odds ratio of 5.5 (CI=1.2-24.8, p=0.037).
  
  
  CONCLUSIONS
  In a cohort of preterm infants without antenatal exposure to MgSO4, initial serum Mg concentrations associated positively with poor outcomes. Further studies are needed in ELBW infants with poor NDO to determine whether they have a dysfunctional transport system that prevents Mg from entering into cells, or they have an active process that excretes Mg extracellularly.
authors: Department of Neonatology, the George Washington University and Children's National Medical Center, Washington, DC, USA.
authors: Susan Y
authors: SY
authors: Kim
authors: Mohamed
authors: M
authors: El-Dib
authors: Tahmina
authors: T
authors: Ahmad
authors: Hany
authors: H
authors: Aly
mesh_terms: D016022:Case-Control Studies; D002657:Child Development; D002658:Developmental Disabilities / Q000097:blood / Q000175:diagnosis; D005260:Female; D006801:Humans; D052577:Infant, Extremely Low Birth Weight / Q000097:blood* / Q000502:physiology; D007231:Infant, Newborn; D007234:Infant, Premature / Q000097:blood* / Q000502:physiology; D008274:Magnesium / Q000097:blood*; D008297:Male; D009422:Nervous System Diseases / Q000097:blood / Q000175:diagnosis; D011446:Prospective Studies
chemical_list: D008274:Magnesium