title: [Neurodevelopmental features of preterm infants at the corrected age of 1 year].
abstract: OBJECTIVE
  To investigate the neurodevelopmental level of preterm infants at the corrected age of 1 year and the effect of complications on neurodevelopment.
  
  
  METHODS
  The clinical data and follow-up data of hospitalized preterm infants were retrospectively studied. The Bayley Scales of Infant Development was used to assess the neurodevelopmental level. Preterm infants were divided into groups according to gestational age, birth weight, and the presence or absence of complications. The mental development index (MDI) and psychomotor development index (PDI) were compared between groups.
  
  
  RESULTS
  At the corrected age of 1 year, compared with the late preterm infants, the early preterm infants had significantly lower MDI and PDI (P<0.05) and significantly higher rates of retarded intellectual and psychomotor development (P<0.01). Compared with the normal birth weight group, the low birth weight group had significantly lower MDI and PDI (P<0.01) and significantly higher rates of retarded intellectual and psychomotor development (P<0.01). The preterm infants with hyperbilirubinemia, birth asphyxia or neonatal respiratory distress syndrome (NRDS) had significantly lower MDI and PDI than those without such complications (P<0.05).
  
  
  CONCLUSIONS
  Lower gestational age and birth weight are associated with worse intellectual and psychomotor development in preterm infants. Complications, such as hyperbilirubinemia, birth asphyxia and NRDS, have adverse effects on neurodevelopment of preterm infants.
authors.affiliation: Department of Child Health Care, Changsha Maternal and Child Health Care Hospital, Changsha 410007, China. 1103549904@qq.com.
authors.forename: Mei
authors.initials: M
authors.lastname: Zhang
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Qian
authors.forename: Xiao-Ni
authors.initials: XN
authors.lastname: Kuang
authors.forename: Zhong
authors.initials: Z
authors.lastname: Yu
authors.forename: Lin
authors.initials: L
authors.lastname: Tan
authors.forename: Chan
authors.initials: C
authors.lastname: Xia
mesh_terms: D001724:Birth Weight; D002657:Child Development; D005865:Gestational Age; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature / Q000254:growth & development*; D007360:Intelligence; D011597:Psychomotor Performance; D012189:Retrospective Studies