Should we use FEV1/FVC <0.70 or FEV1/FVC <LLN to identify subjects with a clinical history indicating COPD – Results from the population-based BOLD study in Salzburg, Austria

Rationale: null To compare the fixed ratio of 0.70 and the LLN to identify subjects presenting with a clinical history indicating COPD. null null Methods: null We used data from the population-based Austrian Burden of Obstructive Lung Disease (BOLD) study. Participants were aged >= 40 years and completed post-bronchodilator spirometry. Risk factors for COPD and respiratory symptoms were recorded. null A clinical history indicating COPD was...