Subjects with Discordant Airways Obstruction: Lost between Spirometric Definitions of COPD

<table>Prevalence of nonreversible airways obstruction with age, using different definitions (per 1000 population). “Fixed ratio”: postbronchodilator FEV1/FVC &lt; 0.70, “LLN”: postbronchodilator FEV1/FVC &lt; LLN, “doctor diagnosis”: prior physicians diagnosis of COPD.</table>

Pulmonary Medicine

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Figure 2

Figure 2: Subjects with Discordant Airways Obstruction: Lost between Spirometric Definitions of COPD 