Episodes of chronic lower respiratory disease by category of emphysema visually.

<p>Model 1 adjusted for age, sex and race/ethnicity.</p><p>Model 2 additionally adjusted for pack years smoking, cotinine at time of CT, private healthcare insurance and suspected chronic lower respiratory disease.</p><p>One person who had percent emphysema measured did not have emphysema assessed visually.</p

Baseline characteristics by CT percent emphysema quartiles.

<p>FEV1 - forced expiratory volume in one second, FVC - forced vital capacity, CLRD – chronic lower respiratory disease (includes any of asthma, COPD, chronic bronchitis and emphysema).</p

Episodes of chronic lower respiratory disease by category of percent emphysema.

<p>Model 1 adjusted for age, sex and race/ethnicity.</p><p>Model 2 additionally adjusted for pack years smoking, cotinine at time of CT, private healthcare insurance and suspected chronic lower respiratory disease.</p

Cumulative incidence plot of time to first episode by percent emphysema.

<p>Cumulative incidence plot of time to first episode by percent emphysema.</p