title: Risk factors for lung function impairment among the general non-smoking Korean population.
abstract: METHODS
  Nationwide general population in South Korea.
  
  
  OBJECTIVE
  Except for tobacco smoking, risk factors for the impairment of lung function have not been widely evaluated. We evaluated the risk factors for lung function impairment among the general non-smoking Korean population.
  
  
  METHODS
  A total of 8164 non-smokers from the spirometry data set of the Korean National Health and Nutrition Examination Surveys IV and V (2008-2010) were included in the study. After sex stratification, multiple survey logistic regression analyses were performed to estimate the association between potential risk factors and impaired lung function in this nationwide cross-sectional study.
  
  
  RESULTS
  The proportion of non-smokers among the general Korean population with forced expiratory volume in 1 s (FEV1) < 80% of predicted, forced vital capacity (FVC) < 80% of predicted and FEV1/FVC ratio < 0.7 were respectively 46.2%, 50.3% and 30.2%. In multiple survey logistic regression analyses, lung function impairment was associated with tuberculosis (TB) and asthma in female non-smokers and asthma in male non-smokers.
  
  
  CONCLUSIONS
  TB and asthma are risk factors for lung function impairment among Korean non-smokers. To prevent further lung function impairment, a careful control system for these factors should be considered when setting health policy priorities.
authors.affiliation: Department of Occupational and Environmental Medicine, College of Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea; Center for Occupational and Environmental Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea.
authors.forename: J-P
authors.initials: JP
authors.lastname: Myong
authors.affiliation: Department of Internal Medicine, Yeouido St Mary's Hospital College of Medicine, Catholic University of Korea, Seoul, Korea.
authors.forename: H-K
authors.initials: HK
authors.lastname: Yoon
authors.affiliation: Department of Internal Medicine, College of Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea.
authors.forename: C K
authors.initials: CK
authors.lastname: Rhee
authors.affiliation: Department of Occupational and Environmental Medicine, College of Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea; Center for Occupational and Environmental Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea.
authors.forename: H-R
authors.initials: HR
authors.lastname: Kim
authors.affiliation: Department of Occupational and Environmental Medicine, College of Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea; Center for Occupational and Environmental Medicine, Seoul St Mary's Hospital, Catholic University of Korea, Seoul, Korea.
authors.forename: J-W
authors.initials: JW
authors.lastname: Koo
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D016015:Logistic Models; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D056910:Republic of Korea / Q000453:epidemiology; D012307:Risk Factors; D012727:Sex Characteristics; D012907:Smoking; D013147:Spirometry; D014376:Tuberculosis / Q000453:epidemiology*; D014797:Vital Capacity; D055815:Young Adult