The Impact of Smoking on Airflow Limitation in Subjects with History of Asthma and Inactive Tuberculosis
- Kim Hyun Jung
- Baek Seunghee
- Kim Hee Jin
- Lee Jae Seung
- Oh Yeon-Mok
- Lee Sang-Do
- Lee Sei Won
DOIAbstract
/FVC<0.7) according to the risk factors and to investigate their impact and interaction in airflow limitation.From the Korean National Health and Nutrition Examination Survey between 2008 and 2012, we analyzed participants over 40 years of age by spirometry, chest radiograph and questionnaire about asthma and smoking history.Of 12,631 participants, 1,548 (12.3%) had airflow limitation. The prevalence of airflow limitation in smokers (≥10 pack-year), asthmatics, and those with inactive TB was 23.9%, 32.1%, and 33.6%. The prevalence increased with the number of risk factors: 86.1% had airflow limitation if they had all three risk factors. Impacts of inactive TB and asthma on airflow limitation were equivalent to 47 and 69 pack-years of smokin...
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