title: Evaluating "old" definitions for the "new" bronchopulmonary dysplasia.
abstract: OBJECTIVE
  To examine the accuracy of different criteria for the diagnosis of bronchopulmonary dysplasia (BPD), based on the final age at which oxygen therapy was stopped, in predicting pulmonary and neurologic outcomes at 18-month corrected age.
  
  
  METHODS
  Data were collected prospectively on infants with birth weights between 500 and 999 g enrolled in the Trial of Indomethacin Prophylaxis in Preterms (TIPP) who survived to discharge home. Differing postnatal ages and postmenstrual ages at which supplemental oxygen therapy was no longer required formed the criteria for defining BPD. Diagnostic accuracy of each criterion for defining BPD was calculated for both poor pulmonary and poor neurosensory outcomes.
  
  
  RESULTS
  The prevalence of poor pulmonary outcome was 54% and of poor neurosensory outcome was 34% in the 956 infants who were eligible for this analysis. Accuracy of different definitions of BPD was limited but greatest when using supplemental oxygen requirement at 36 weeks' postmenstrual age to predict long-term pulmonary outcome (63%) and 40 weeks to predict long-term neurosensory outcome (68%).
  
  
  CONCLUSIONS
  Poor pulmonary outcome and poor neurosensory outcome are common late adverse outcomes in this population. BPD as defined by duration of oxygen therapy is a less accurate surrogate currently than in previous eras.
authors.affiliation: Department of Paediatrics, Royal Women's Hospital, Melbourne, Victoria, Australia.
authors.forename: Peter G
authors.initials: PG
authors.lastname: Davis
authors.forename: Kevin
authors.initials: K
authors.lastname: Thorpe
authors.forename: Robin
authors.initials: R
authors.lastname: Roberts
authors.forename: Barbara
authors.initials: B
authors.lastname: Schmidt
authors.forename: Lex W
authors.initials: LW
authors.lastname: Doyle
authors.forename: Haresh
authors.initials: H
authors.lastname: Kirpalani
mesh_terms: D001927:Brain Diseases / Q000175:diagnosis; D001997:Bronchopulmonary Dysplasia / Q000175:diagnosis* / Q000503:physiopathology; D002658:Developmental Disabilities / Q000175:diagnosis; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008171:Lung Diseases / Q000175:diagnosis; D010102:Oxygen Inhalation Therapy; D011237:Predictive Value of Tests; D011379:Prognosis; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D009626:Terminology as Topic; D016896:Treatment Outcome