title: The Relationship between Lung Function and Metabolic Syndrome in Obese and Non-Obese Korean Adult Males.
abstract: BACKGROUND
  The existence of an association between lung function and metabolic syndrome (MetS) has been debated in cases involving non-obese subjects. To address this debate, we performed a cross-sectional study to investigate the association between lung function and MetS in both obese and non-obese populations.
  
  
  METHODS
  The present study consisted of a total of 1,951 Korean male subjects. In this study group, we investigated relationships between lung function and MetS risk factors such as fasting serum glucose, systolic blood pressure (SBP), insulin resistance index, waist circumference (WC), and hemoglobin A(1C) level.
  
  
  RESULTS
  Forced vital capacity (FVC) values were significantly lower in the MetS group compared with those of the non-MetS group. In both non-obese (body mass index [BMI] < 25 kg/m(2)) and obese subjects (BMI ≥ 25 kg/m(2)), fasting serum glucose, hemoglobin A(1C) level, insulin resistance index, SBP, WC, and the prevalences of diabetes and MetS were significantly higher in subjects in the lowest FVC quartile compared with those in the highest FVC quartile. Odds ratios for the presence of MetS risk factors, after adjusting for age and height, ranged from 1.21 to 1.39 (P < 0.01) for a one standard deviation decrease in FVC.
  
  
  CONCLUSIONS
  The results of our study suggest that decreased vital capacity in Korean adult male subjects is associated with MetS, irrespective of obesity.
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Soo Kyoung
authors.initials: SK
authors.lastname: Kim
authors.forename: Kyu Yeon
authors.initials: KY
authors.lastname: Hur
authors.forename: Yoon Ho
authors.initials: YH
authors.lastname: Choi
authors.forename: Sun Wook
authors.initials: SW
authors.lastname: Kim
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Chung
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Kim
authors.forename: Moon-Kyu
authors.initials: MK
authors.lastname: Lee
authors.forename: Yong-Ki
authors.initials: YK
authors.lastname: Min
authors.forename: Kwang-Won
authors.initials: KW
authors.lastname: Kim
authors.forename: Jae Hyeon
authors.initials: JH
authors.lastname: Kim