title: Weight Growth Velocity and Neurodevelopmental Outcomes in Extremely Low Birth Weight Infants.
abstract: BACKGROUND
  This study aimed to assess whether weight growth velocity (WGV) predicts neurodevelopmental outcomes in extremely low birth weight infants (ELBWIs).
  
  
  METHODS
  Subjects were infants who weighed 501-1000 g at birth and were included in the cohort of the Neonatal Research Network of Japan (2003-2007). Patel's exponential model (EM) method was used to calculate WGV between birth and discharge. Assessment of predictions of death or neurodevelopmental impairment (NDI) was performed at 3 years of age based on the WGV score, which was categorized by per one increase in WGV. Multivariate logistic regression analysis was used to calculate adjusted odds ratios and their 95% confidence intervals (95%CI).
  
  
  RESULTS
  In the 2961 ELBWIs assessed, the median WGV was 10.5 g/kg/day (interquartile, 9.4-11.9). With the categorical approach, the adjusted odds ratios for death or NDI with WGV scores of 6 and 7 were 2.41 (95%CI, 1.60-3.62) and 1.81 (95%CI, 1.18-2.75), respectively, relative to the reference WGV score of 10. WGV scores ≥8 did not predict death or NDI.
  
  
  CONCLUSIONS
  WGV scores <8 were significant predictors suggesting that values of WGV during hospitalization in a NICU are associated with neurodevelopmental outcomes. Further investigations is necessary to determine whether additional nutritional support may improve low WGV in ELBWIs.
authors.affiliation: Department of Pediatrics, Kochi Health Sciences Center, Kochi, Kochi, Japan.
authors.forename: Hidehiko
authors.initials: H
authors.lastname: Maruyama
authors.affiliation: Department of Neuropsychopharmacology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
authors.forename: Naohiro
authors.initials: N
authors.lastname: Yonemoto
authors.affiliation: Department of Pediatrics, Jichi Medical University, Shimotsuke, Tochigi, Japan.
authors.forename: Yumi
authors.initials: Y
authors.lastname: Kono
authors.affiliation: Department of Neonatology, Maternal and Perinatal Center, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kusuda
authors.affiliation: Department of Neonatology, Osaka Medical Center and Research Institute for Maternal and Child Health, Izumi, Osaka, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Fujimura
mesh_terms: D001835:Body Weight; D002657:Child Development; D016001:Confidence Intervals; D006801:Humans; D052577:Infant, Extremely Low Birth Weight / Q000254:growth & development*; D007231:Infant, Newborn; D016015:Logistic Models; D009420:Nervous System / Q000254:growth & development*; D016017:Odds Ratio