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Published on: June 10, 2022
Modified Chrispin-Norman chest radiography score for cystic fibrosis: observer agreement and correlation with lung
P A de Jong1, J A Achterberg, O A M Kessels
1Department of Radiology, University Medical Center Utrecht and Wilhelmina Children's Hospital, HP E.01.132, Heidelberglaan 100, 3584 CX Utrecht, Netherlands. pimdejong@gmail.com
Objective:
To test observer agreement and two strategies for possible improvement (consensus meeting and reference images) for the modified Chrispin-Norman score for children with cystic fibrosis (CF).
Methods:
Before and after a consensus meeting and after developing reference images three observers scored sets of 25 chest radiographs from children with CF. Observer agreement was tested for line, ring, mottled and large soft shadows, for overinflation and for the composite modified Chrispin-Norman score. Correlation with lung function was assessed.
Results:
Before the consensus meeting agreement between observers 1 and 2 was moderate-good, but with observer 3 agreement was poor-fair. Scores correlated significantly with spirometry for observers 1 and 2 (-0.72
Conclusion:
Consensus meetings and reference images improve among-observer agreement for the modified Chrispin-Norman score, but good agreement was not achieved among all observers for the modified Chrispin-Norman score and for bronchial line and ring shadows.
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