The Impact of Smoking on Airflow Limitation in Subjects with History of Asthma and Inactive Tuberculosis
Fig 2
The prevalence of airflow limitation according to participant characteristics.
Smoking is defined as ≥ 10 pack-years. Airflow limitation is defined as FEV1/FVC < 0.7. *Participants with smoking history less than 10 pack-years and without inactive TB and asthma.