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. 2018 Mar 28;13:1053–1059. doi: 10.2147/COPD.S156617

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© 2018 Choi et al. This work is published and licensed by Dove Medical Press Limited

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Association of PM₁₀, CAI and severe AECOPD events after adjustment for humidity and temperature. (A) The association of PM₁₀ and severe AECOPD events. (B) The association of CAI and severe AECOPD events.

Abbreviations: PM₁₀, particulate matter with a diameter of less than 10 µm; CAI, Comprehensive Air-quality Index; AECOPD, acute exacerbations of chronic obstructive pulmonary disease.