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. 2019 May 21;19:97. doi: 10.1186/s12890-019-0852-4

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Relationship between ALA Intake and Odds of Respiratory Symptoms is Modified by LA Intake in U.S. Adults with COPD. Odds of chronic cough (Panel A) and wheeze (Panel B) per 1 g increase in ALA. ALA and LA included simultaneously in logistic regression models adjusting for age, gender, race, education, smoking status, FEV₁, caloric intake, BMI, and pack-years