Smoking.

<p>Smoking.</p

Respiratory symptoms, smoking, occupational exposure and economic impact for BOLD questionnaire (n = 100).

<p>Respiratory symptoms, smoking, occupational exposure and economic impact for BOLD questionnaire (n = 100).</p

Kappa range and level of agreement.

<p>Kappa range and level of agreement.</p

Forms with returned errors.

<p>Forms with returned errors.</p

Knowledge, opinions, and attitudes.

<p>Knowledge, opinions, and attitudes.</p

Economic impact (2).

<p>Economic impact (2).</p

Respiratory symptoms and disorder.

<p>Respiratory symptoms and disorder.</p

Medication.

<p>Medication.</p

Incomplete records in 100 questionnaires.

<p>Incomplete records in 100 questionnaires.</p

Measurement of Targeted Maximum Likelihood Estimation (TMLE).

Measurement of Targeted Maximum Likelihood Estimation (TMLE).</p