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. 2017 Nov 9;4(1):e000252. doi: 10.1136/bmjresp-2017-000252

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© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt and build upon this work, for commercial use, provided the original work is properly cited. See: http://creativecommons.org/licenses/by/4.0/

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(A, B) Airway circularity (Cr), (C, D) normalised wall thickness (WT*) and (E, F) normalised hydraulic diameter (D _h*) in 10 local regions among healthy, asthmatic and chronic obstructive pulmonary disease (COPD) subjects. Values are presented as mean (±CI). *P<0.01 for healthy versus asthmatic subjects. †P<0.01 with red-dashed box for asthmatic versus COPD subjects. ‡P<0.01 for COPD subjects versus healthy subjects. BronInt, right intermediate bronchus; LMB, left main bronchus; RMB, right main bronchus; sLLL, subgrouped left lower lobe; sLUL, subgrouped left upper lobe; sRLL, subgrouped right lower lobe; sRML, subgrouped right middle lobe; sRUL, subgrouped right upper lobe; TriLLB, trifurcation of left lower lobe.