A diagnostic approach and natural course of a patient with asthma-COPD overlap syndrome.

Respirol Case Rep · 2015 · PMC4694594 · PMID 26740875

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showed a trendno p-value reported

Regarding the natural course of COPD, Asian patients with COPD in the UPLIFT trial showed a trend toward a reduced annual rate of decline in the post‐bronchodilator FEV 1 (–26 mL/year in the tiotropium group) relative to patients in other regions of the world [5] .

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