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. 2015 Nov 18;10:2525–2533. doi: 10.2147/COPD.S94211

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© 2015 Chen et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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Receiver operating characteristic (ROC) curves showing the diagnostic accuracy of different CT measurements for COPD.

Notes: MPA was selected as the best index for the diagnosis of COPD. The optimal threshold value was 27.5 mm (area under the curve =0.711, specificity 54%, and sensitivity 80%).

Abbreviations: CT, computed tomography; COPD, chronic obstructive pulmonary disease; MPA, main pulmonary artery; RPA, right pulmonary artery; LPA, left pulmonary artery; AAo, ascending aorta; DAo, descending aorta.