Association of Bone Mineral Density with Airway Obstruction and Emphysema

Tuberculosis and Respiratory Diseases

article

Yun Su Sim¹  Jin Hwa Lee¹  Yookyung Kim²  Jung Hyun Chang¹ 

[1] Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ewha Medical Research Institute, Ewha Womans University School of Medicine;Department of Radiology, Ewha Medical Research Institute, Ewha Womans University School of Medicine

关键词: Airway Obstruction;    Bone Density;    Pulmonary Emphysema;    Osteoporosis;    Body Mass Index;   

DOI  :  10.4046/trd.2012.72.3.310

学科分类：医学（综合）

来源: The Korean Academy of Tuberculosis and Respiratory Diseases

【 摘 要 】

Background Airway obstruction and the extent of emphysema are reported to be responsible for reduced bone mineral density (BMD). Corresponding to different phenotypes of a pulmonary disease, different severity in extra pulmonary features may exist. We compared BMDs of subjects with or without airway obstruction and/or emphysema and investigated the relationships among BMD, the severity of airway obstruction, and the extent of emphysema. Methods Using a university hospital database, we reviewed patients over 40 years old who performed spirometry, computed tomography of chest, and measurement of BMD of the lumbar (L) spine. According to the presence or absence of airway obstruction and/or emphysema, four groups were classified. Results Among a total of 59 subjects, 33 (56%) had osteoporosis. The prevalence of osteoporosis in subjects with no airway obstruction and no emphysema, those with only emphysema, those with only airway obstruction, and those with both airway obstruction and emphysema were 42%, 57%, 64%, and 73%, respectively (p=0.047 by linear-by-linear association). The mean T-scores of BMD of L1 (p=0.032) and L1-4 spines were different among the four groups (p=0.034). Although the T-score of L1 BMD negatively correlated with the extent of emphysema (r=-0.275, p=0.035) and positively with each of body mass index (BMI) (r=0.520, p<0.001), forced expiratory volume in one second (FEV 1 ) (r=0.330, p=0.011), FEV 1 /forced vital capacity (r=0.409, p=0.001), and forced expiratory flow at 25~75% of FVC (FEF 25-75% ) (r=0.438, p=0.0001), respectively, multiple linear regression analysis indicated that BMI (p<0.001) and FEF 25-75% were predictive of BMD (p=0.012). Conclusion Low BMI and airway obstruction were strongly associated with reduced bone density rather than the extent of emphysema.

【 授权许可】

CC BY-NC