PRAGMA-CF. A quantitative structural lung disease CT outcome in young children with cystic fibrosis
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PRAGMA-CF. A quantitative structural lung disease CT outcome in young children with cystic fibrosis. / Rosenow, Tim; Oudraad, Merel C.J.; Murray, Conor P.; Turkovic, Lidija; Kuo, Wieying; de Bruijne, Marleen; Ranganathan, Sarath C.; Tiddens, Harm A.W.M.; Stick, Stephen M.
In: American Journal of Respiratory and Critical Care Medicine, Vol. 191, No. 10, 2015, p. 1158-1165.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - PRAGMA-CF. A quantitative structural lung disease CT outcome in young children with cystic fibrosis
AU - Rosenow, Tim
AU - Oudraad, Merel C.J.
AU - Murray, Conor P.
AU - Turkovic, Lidija
AU - Kuo, Wieying
AU - de Bruijne, Marleen
AU - Ranganathan, Sarath C.
AU - Tiddens, Harm A.W.M.
AU - Stick, Stephen M.
PY - 2015
Y1 - 2015
N2 - RATIONALE: Chest computed tomography (CT) is the gold standard for demonstrating cystic fibrosis (CF) airways disease. However, there are no standardised outcome measures appropriate for children under 6 years.OBJECTIVES: We developed the Perth-Rotterdam Annotated Grid Morphometric Analysis for CF (PRAGMA-CF), a quantitative measure of airways disease, and compared it to the commonly used CF-CT scoring method.METHODS: CT scans from the Australian Respiratory Early Surveillance Team for CF (AREST CF) cohort in Western Australia were included. PRAGMA-CF was performed by annotating a grid overlaid on ten axial slices for the presence of bronchiectasis, mucous plugging or other airway abnormalities (inspiratory scans) and trapped air (expiratory scans). The separate proportions of total disease (%Dis), bronchiectasis (%Bx) and trapped air (%TA) were determined. Thirty scans were used for observer reliability, and thirty paired scans obtained at 1 and 3-years old were used for comparison with a validated standard and biological plausibility.MEASUREMENTS AND MAIN RESULTS: Intraobserver, intraclass correlation coefficients (95% confidence interval) for %Dis, %Bx and %TA were 0.93 (0.86 - 0.97), 0.93 (0.85 - 0.96) and 0.96 (0.91 - 0.98), respectively. The change in %Dis (p = 0.004) and %Bx (p = 0.001) with PRAGMA-CF was related to neutrophil elastase (NE) presence at age 3, whereas only the change in bronchiectasis score was related to NE (p < 0.001) with CF-CT. Sample size calculations for various effect sizes are presented.CONCLUSIONS: PRAGMA-CF is a sensitive and reproducible outcome measure for assessing the extent of lung disease in very young children with CF.
AB - RATIONALE: Chest computed tomography (CT) is the gold standard for demonstrating cystic fibrosis (CF) airways disease. However, there are no standardised outcome measures appropriate for children under 6 years.OBJECTIVES: We developed the Perth-Rotterdam Annotated Grid Morphometric Analysis for CF (PRAGMA-CF), a quantitative measure of airways disease, and compared it to the commonly used CF-CT scoring method.METHODS: CT scans from the Australian Respiratory Early Surveillance Team for CF (AREST CF) cohort in Western Australia were included. PRAGMA-CF was performed by annotating a grid overlaid on ten axial slices for the presence of bronchiectasis, mucous plugging or other airway abnormalities (inspiratory scans) and trapped air (expiratory scans). The separate proportions of total disease (%Dis), bronchiectasis (%Bx) and trapped air (%TA) were determined. Thirty scans were used for observer reliability, and thirty paired scans obtained at 1 and 3-years old were used for comparison with a validated standard and biological plausibility.MEASUREMENTS AND MAIN RESULTS: Intraobserver, intraclass correlation coefficients (95% confidence interval) for %Dis, %Bx and %TA were 0.93 (0.86 - 0.97), 0.93 (0.85 - 0.96) and 0.96 (0.91 - 0.98), respectively. The change in %Dis (p = 0.004) and %Bx (p = 0.001) with PRAGMA-CF was related to neutrophil elastase (NE) presence at age 3, whereas only the change in bronchiectasis score was related to NE (p < 0.001) with CF-CT. Sample size calculations for various effect sizes are presented.CONCLUSIONS: PRAGMA-CF is a sensitive and reproducible outcome measure for assessing the extent of lung disease in very young children with CF.
U2 - 10.1164/rccm.201501-0061OC
DO - 10.1164/rccm.201501-0061OC
M3 - Journal article
C2 - 25756857
VL - 191
SP - 1158
EP - 1165
JO - American Journal of Respiratory and Critical Care Medicine
JF - American Journal of Respiratory and Critical Care Medicine
SN - 1073-449X
IS - 10
ER -
ID: 136058018