Main characteristics of the 520 cases of asthma identified in the GEIRD study.

<p>Main characteristics of the 520 cases of asthma identified in the GEIRD study.</p

Coding and definition of the candidate variables.

<p>Coding and definition of the candidate variables.</p

Main characteristics of the 520 cases of asthma identified in the GEIRD study.

<p>Main characteristics of the 520 cases of asthma identified in the GEIRD study.</p

Median of the Symptom frequency and anti-asthmatic Treatment intensity Score (STS) according to the GINA classification of asthma severity.

<p>Data from the GEIRD study.</p

Relationship between the Symptom frequency and anti-asthmatic Treatment intensity Score (STS) computed by using the weights from the GEIRD data (horizontal axis) and STS computed by using the weights from the ECRHS II data (vertical axis).

<p>Relationship between the Symptom frequency and anti-asthmatic Treatment intensity Score (STS) computed by using the weights from the GEIRD data (horizontal axis) and STS computed by using the weights from the ECRHS II data (vertical axis).</p

Association between the Symptom frequency and anti-asthmatic Treatment intensity Score (STS) at baseline (1991–1993) and long-term outcomes at the end of follow-up (1999–2001).

<p>Data from the ECRHS study.</p

Distribution of the Symptom frequency and anti-asthmatic Treatment intensity Score (STS).

<p>Data from the GEIRD study.</p

Flow chart of the GEIRD study in the Pavia, Sassari, Turin and Verona centres, and selection of the cases of asthma.

<p>Flow chart of the GEIRD study in the Pavia, Sassari, Turin and Verona centres, and selection of the cases of asthma.</p

Distribution of asthma severity at EC2 in subjects without current asthma at EC1 (ECI-0) and in subjects with asthma, according to asthma severity at EC-1.

<p>Distribution of asthma severity at EC2 in subjects without current asthma at EC1 (ECI-0) and in subjects with asthma, according to asthma severity at EC-1.</p

Study design.

<p>Study design.</p