Co-first authors: Kwang Ha Yoo and Young Sam Kim contributed equally to this article.
Prevalence of chronic obstructive pulmonary disease in Korea: The fourth Korean National Health and Nutrition Examination Survey, 2008
Article first published online: 25 APR 2011
© 2011 The Authors; Respirology © 2011 Asian Pacific Society of Respirology
Volume 16, Issue 4, pages 659–665, May 2011
How to Cite
YOO, K. H., KIM, Y. S., SHEEN, S. S., PARK, J. H., HWANG, Y. I., KIM, S.-H., YOON, H. I., LIM, S. C., PARK, J. Y., PARK, S. J., SEO, K. H., KIM, K. U., OH, Y.-M., LEE, N. Y., KIM, J. S., OH, K. W., KIM, Y. T., PARK, I.-W., LEE, S.-D., KIM, S. K., KIM, Y. K. and HAN, S. K. (2011), Prevalence of chronic obstructive pulmonary disease in Korea: The fourth Korean National Health and Nutrition Examination Survey, 2008. Respirology, 16: 659–665. doi: 10.1111/j.1440-1843.2011.01951.x
- Issue published online: 25 APR 2011
- Article first published online: 25 APR 2011
- Accepted manuscript online: 23 FEB 2011 04:46AM EST
- Received 13 August 2010; invited to revise 19 September 2010, 14 November 2010; revised 15 October 2010, 2 December 2010; accepted 16 December 2010 (Associate Editor: David Hui).
- chronic obstructive pulmonary disease;
Background and objective: Because the mortality and social burden associated with COPD is increasing, repeated surveys of the prevalence of COPD have been used to assess risk factors, detect potential patients, and establish early diagnoses and management protocols. We report the prevalence of spirometrically detected COPD in Korea in 2008, using data from the fourth Korean National Health and Nutrition Survey.
Methods: Using nationwide stratified random sampling, based on the Korean Statistical Office census, 6840 subjects aged ≥19 years underwent spirometry, which was performed by four trained technicians, during 2008. The place of residence, levels of education and income and smoking status, as well as other results from a COPD survey questionnaire were also assessed.
Results: Airflow obstruction (FEV1/FVC < 0.7) was detected in 8.8% of subjects aged ≥19 years (11.6% of men and 5.9% of women) and COPD was detected in 13.4% of subjects aged ≥40 years (19.4% of men and 7.9% of women). Of the 6840 subjects, 27.3% were current smokers and 17.2% were former smokers, and the prevalence of COPD was higher in current and former smokers than in never smokers. Approximately 94% of patients with COPD had mild-to-moderate disease, without apparent symptoms; only 2.4% had been diagnosed by a physician and only 2.1% of patients had been treated. The independent risk factors for COPD were smoking, advanced age and male gender.
Conclusions: Although the prevalence of COPD in Korea is high, the disease is underdiagnosed and most COPD patients are under-treated.