title: Respiratory morbidity, lung function and fitness assessment after bronchopulmonary dysplasia.
abstract: OBJECTIVE
  To examine respiratory morbidity and exercise capacity at school age in children after bronchopulmonary dysplasia (BPD).
  
  
  METHODS
  Former preterm children after BPD (n=23), without BPD (n=33) and term controls (n=33) were compared using respiratory health questionnaire, spirometry and six-minute walk test (6MWT).
  
  
  RESULTS
  Wheezing was more frequent in BPD group (61%) vs non-BPD group (24%; P<0.001) and controls (15%; P<0.001) in the first year of life and until a year before inclusion. The children after BPD had lower mean value (P<0.001) for forced expiratory volume in 1 s (75.3%) vs non-BPD (89.8%) and controls (91.1%). Six-minute walking distance was lower after BPD by 58.3 m compared with non-BPD group (P=0.002) and by 53.7 m compared with controls (P=0.005). After adjusting for confounding factors the difference was not significant anymore.
  
  
  CONCLUSIONS
  More frequent wheezing and reduced lung function persist into school age after BPD.
authors.affiliation: Department of Pulmonology, University Children's Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia.
authors.forename: M
authors.initials: M
authors.lastname: Praprotnik
authors.affiliation: Division of Perinatology, Department of Gynecology and Obstretics, University Medical Centre Ljubljana, Ljubljana, Slovenia.
authors.forename: I
authors.initials: I
authors.lastname: Stucin Gantar
authors.affiliation: Division of Perinatology, Department of Gynecology and Obstretics, University Medical Centre Ljubljana, Ljubljana, Slovenia.
authors.forename: M
authors.initials: M
authors.lastname: Lučovnik
authors.affiliation: Department of Allergology, Rheumatology and Clinical Immunology, University Children's Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia.
authors.forename: T
authors.initials: T
authors.lastname: Avčin
authors.affiliation: Department of Pulmonology, University Children's Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia.
authors.forename: U
authors.initials: U
authors.lastname: Krivec
mesh_terms: D001997:Bronchopulmonary Dysplasia / Q000503:physiopathology*; D002648:Child; D005080:Exercise Test; D017079:Exercise Tolerance; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D007234:Infant, Premature; D008168:Lung / Q000503:physiopathology*; D008297:Male; D012135:Respiratory Sounds; D017524:Slovenia; D013147:Spirometry; D013334:Students; D011795:Surveys and Questionnaires