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Published in: European Radiology 1/2012

01-01-2012 | Chest

Acute exacerbation of idiopathic pulmonary fibrosis: high-resolution CT scores predict mortality

Authors: Kiminori Fujimoto, Hiroyuki Taniguchi, Takeshi Johkoh, Yasuhiro Kondoh, Kazuya Ichikado, Hiromitsu Sumikawa, Takashi Ogura, Kensuke Kataoka, Takahiro Endo, Atsushi Kawaguchi, Nestor L. Müller

Published in: European Radiology | Issue 1/2012

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Abstract

Objectives

To determine high-resolution computed tomography (HRCT) findings helpful in predicting mortality in patients with acute exacerbation of idiopathic pulmonary fibrosis (AEx-IPF).

Methods

Sixty patients with diagnosis of AEx-IPF were reviewed retrospectively. Two groups (two observers each) independently evaluated pattern, distribution, and extent of HRCT findings at presentation and calculated an HRCT score at AEx based on normal attenuation areas and extent of abnormalities, such as areas of ground-glass attenuation and/or consolidation with or without traction bronchiectasis or bronchiolectasis and areas of honeycombing. The correlation between the clinical data including the HRCT score and mortality (cause-specific survival) was evaluated using the univariate and multivariate Cox-regression analyses.

Results

Serum KL-6 level, PaCO2, and the HRCT score were statistically significant predictors on univariate analysis. Multivariate analysis revealed that the HRCT score was an independently significant predictor of outcome (hazard ratio, 1.13; 95% confidence interval, 1.06–1.19, P = 0.0002). The area under receiver operating characteristics curve for the HRCT score was statistically significant in the classification of survivors or nonsurvivors (0.944; P < 0.0001). Survival in patients with HRCT score ≥245 was worse than those with lower score (log-rank test, P < 0.0001).

Conclusion

The HRCT score at AEx is independently related to prognosis in patients with AEx-IPF.
Key Points
High-Resolution Computed Tomography (HRCT) helps clinicians to assess patients with interstitial fibrosis.
The main abnormalities of acute exacerbation are ground-glass opacification and consolidation.
Extent of abnormalities on HRCT correlates with poor prognosis.
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Metadata
Title
Acute exacerbation of idiopathic pulmonary fibrosis: high-resolution CT scores predict mortality
Authors
Kiminori Fujimoto
Hiroyuki Taniguchi
Takeshi Johkoh
Yasuhiro Kondoh
Kazuya Ichikado
Hiromitsu Sumikawa
Takashi Ogura
Kensuke Kataoka
Takahiro Endo
Atsushi Kawaguchi
Nestor L. Müller
Publication date
01-01-2012
Publisher
Springer-Verlag
Published in
European Radiology / Issue 1/2012
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-011-2211-6

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