title: Do currently recommended Bayley-III cutoffs overestimate motor impairment in infants born <27 weeks gestation?
abstract: OBJECTIVE
  To determine whether a Bayley-III motor composite score of 85 may overestimate moderate-severe motor impairment by analyzing Bayley-III motor components and developing cut-point scores for each.
  
  
  METHODS
  Retrospective study of 1183 children born <27 weeks gestation at NICHD Neonatal Research Network centers and evaluated at 18-22 months corrected age. Gross Motor Function Classification System determined gross motor impairment. Statistical analyses included linear and logistic regression and sensitivity/specificity.
  
  
  RESULTS
  Bayley-III motor composite scores were strong indicators of gross/fine motor impairment. A motor composite cut-point of 73 markedly improved the specificity for identifying gross and/or fine motor impairment (94% compared with a specificity of 76% for the proposed new cut-point of 85). A Fine Motor Scaled Score <3 differentiated mild from moderate-severe fine motor impairment.
  
  
  CONCLUSIONS
  This study indicates that a Bayley-III motor composite score of 85 may overestimate impairment. Further studies are needed employing term controls and longer follow-up.
authors: Department of Pediatrics, Division of Neonatology, University of Texas Health Science Center at Houston, Houston, TX, USA.
authors: A F
authors: AF
authors: Duncan
authors: Statistics and Epidemiology Unit, RTI International, Research Triangle Park, NC, USA.
authors: C
authors: C
authors: Bann
authors: Children's Medical Center, Dallas, TX, USA.
authors: C
authors: C
authors: Boatman
authors: Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA, USA.
authors: S R
authors: SR
authors: Hintz
authors: Department of Pediatrics, University of California San Diego, La Jolla, CA, USA.
authors: Y E
authors: YE
authors: Vaucher
authors: Department of Pediatrics, Women & Infants' Hospital, Brown University, Providence, RI, USA.
authors: B R
authors: BR
authors: Vohr
authors: Department of Pediatrics, Children's Hospital Medical Center and University of Cincinnati, Cincinnati, OH, USA.
authors: K
authors: K
authors: Yolton
authors: Department of Pediatrics, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA.
authors: R J
authors: RJ
authors: Heyne
mesh_terms: D002657:Child Development / Q000145:classification; D005260:Female; D005865:Gestational Age; D006801:Humans; D062071:Infant, Extremely Premature / Q000502:physiology*; D007231:Infant, Newborn; D008297:Male; D019957:Motor Skills Disorders / Q000175:diagnosis*; D009483:Neuropsychological Tests; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity
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