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Association of serum bilirubin level with lung function decline: a Korean community-based cohort study.

 Ah Young Leem  ;  Ha Yan Kim  ;  Young Sam Kim  ;  Moo Suk Park  ;  Joon Chang  ;  Ji Ye Jung 
 RESPIRATORY RESEARCH, Vol.19 : 99, 2018 
Journal Title
Issue Date
Adult ; Aged ; Bilirubin/blood* ; Biomarkers/blood ; Cohort Studies ; Community Health Services/trends* ; Female ; Follow-Up Studies ; Humans ; Lung/physiology* ; Male ; Middle Aged ; Republic of Korea/epidemiology ; Respiration Disorders/blood* ; Respiration Disorders/epidemiology* ; Respiration Disorders/physiopathology ; Vital Capacity/physiology
Bilirubin ; Biomarker ; Lung function
BACKGROUND: Bilirubin has been reported to be associated with respiratory diseases due to its antioxidant action. We aimed to evaluate the relationship between serum bilirubin concentration and annual lung function decline in the Korean general population. METHODS: The study included 7986 subjects aged 40-69 years from the Ansung-Ansan cohort database I (2001-2002)-III (2005-2006). We analyzed the relationships between serum bilirubin level and forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), FEV1/FVC, and mean forced expiratory flow between 25 and 75% of FVC (FEF25-75%) at baseline, as well as the annual average changes in these lung parameters. RESULTS: The FEV1, FVC, and FEF25-75% were significantly associated with serum bilirubin levels after adjustment for age, sex, body mass index (BMI), and smoking status (all P < 0.001). When stratified according to smoking status, these relationships were significant in never-smokers. Additionally, serum bilirubin level was negatively associated with the annual decline in FEV1 and FVC, and positively associated with the annual decline in FEV1/FVC after adjustment for age, sex, BMI, baseline lung function, and smoking status (all P < 0.001). CONCLUSIONS: We found significant associations of serum bilirubin levels with FEV1, FVC, and FEF25-75% in the general population, especially in never-smokers. Moreover, serum bilirubin levels were related with the annual decline in FEV1, FVC, and FEV1/FVC ratio.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Young Sam(김영삼) ORCID logo https://orcid.org/0000-0001-9656-8482
Park, Moo Suk(박무석) ORCID logo https://orcid.org/0000-0003-0820-7615
Leem, Ah Young(임아영) ORCID logo https://orcid.org/0000-0001-5165-3704
Chang, Joon(장준) ORCID logo https://orcid.org/0000-0003-4542-6841
Jung, Ji Ye(정지예) ORCID logo https://orcid.org/0000-0003-1589-4142
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