title: Thoracic excursion measurement in children with cystic fibrosis.
abstract: BACKGROUND
  Measurement of thoracic excursion (TEM) during maximal ventilation is part of the physiotherapy assessment in children with cystic fibrosis (CF).
  
  
  OBJECTIVE
  The purpose of our study was to examine the reliability of TEM and its relation with pulmonary function.
  
  
  METHODS
  Thoracic excursions were measured using a measuring tape. Thirty children participated in an intra-observer and inter-observer reliability study. Reliability was determined by calculating the typical error in repeated measurement, limits of agreement and correlation coefficients. Cross-sectional data from the annual check-ups were used to measure the relation between TEM and pulmonary function.
  
  
  RESULTS
  In the intra-observer reliability study the typical error was 0.31 cm, the limits of agreement were +/-0.86 cm. Pearson's r and ICC were 0.96 and 0.95, respectively. In the inter-observer reliability study these values were 0.56 cm, +/-1.55 cm, 0.85 and 0.85, respectively. TEM correlated significantly with height (0.31, P<0.001), FVC (0.44, P<0.001), FEV1 (0.41, P<0.001) and TLC (0.19, P<0.05), and there was a significant inverse correlation with RV%TLC (-0.45, P<0.001).
  
  
  CONCLUSIONS
  TEM is a reliable assessment tool. Thoracic excursion is significantly, although moderately correlated with pulmonary function.
authors.affiliation: Department of Paediatric Physiotherapy and Paediatric Exercise Physiology, University Medical Centre/Wilhelmina Children's Hospital Utrecht, Room KB 02.056.0, P.O. Box 85090, 3508 AB Utrecht, The Netherlands. j.custers@umcutrecht.nl
authors.forename: J W H
authors.initials: JW
authors.lastname: Custers
authors.forename: H G M
authors.initials: HG
authors.lastname: Arets
authors.forename: R H H
authors.initials: RH
authors.lastname: Engelbert
authors.forename: F T C
authors.initials: FT
authors.lastname: Kooijmans
authors.forename: C K
authors.initials: CK
authors.lastname: van der Ent
authors.forename: P J M
authors.initials: PJ
authors.lastname: Helders
mesh_terms: D000293:Adolescent; D001837:Body Weights and Measures; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D003550:Cystic Fibrosis / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D015588:Observer Variation; D012123:Pulmonary Ventilation / Q000502:physiology*; D015203:Reproducibility of Results; D012129:Respiratory Function Tests; D013909:Thorax / Q000503:physiopathology*