title: Association between coronary artery calcification using low-dose MDCT coronary angiography and bone mineral density in middle-aged men and women.
abstract: Six hundred sixty-one participants who had at least one cardiac risk factor but were without known coronary heart disease underwent low-dose multidetector computed tomography coronary angiography (MDCT-CA) and dual-energy X-ray absorptiometry. The association between presence of subclinical coronary calcified plaque and low bone mineral density for the middle-aged individual was not significant after multivariate adjustment.
  
  
  BACKGROUND
  Results of previous clinical studies assessing the relationship between osteoporosis and coronary calcification are inconsistent. This study aimed to evaluate the association between subclinical coronary calcification and osteoporosis in middle-aged men, premenopausal women, and postmenopausal women by using low-dose MDCT-CA and bone mineral density (BMD).
  
  
  METHODS
  This study enrolled 661 participants with at least one cardiac risk factor but without known coronary artery disease (CAD). All subjects underwent low-dose MDCT-CA and dual-energy X-ray absorptiometry on the same day.
  
  
  RESULTS
  The mean age was 52.2 years for men, 44.8 years for premenopausal women, and 59.1 years for postmenopausal women. The prevalence of calcified plaques between men with normal BMD and low BMD at lumbar spine were significantly different (P=0.042). The prevalence of mixed plaque and calcified plaque between pre- and postmenopausal women with normal BMD and low BMD at lumbar spine and femoral neck were not significantly different (P>0.05). Possible association between lumbar spine, femoral neck, and total proximal femur BMD and the presence of CAP was evaluated for men, premenopausal women, and postmenopausal women using multivariate logistic regression analysis: results were not significant (P>0.05).
  
  
  CONCLUSIONS
  Our study demonstrates that the association between the presence of subclinical coronary calcification and low BMD among middle-aged men and women was not significant after controlling for age and other risk factors for CAD and osteoporosis.
authors.affiliation: Department of Medicine, College of Medicine, China Medical University, Taichung, Taiwan. d11109lin@gmail.com
authors.forename: T
authors.initials: T
authors.lastname: Lin
authors.forename: J C
authors.initials: JC
authors.lastname: Liu
authors.forename: L Y
authors.initials: LY
authors.lastname: Chang
authors.forename: C W
authors.initials: CW
authors.lastname: Shen
mesh_terms: D015502:Absorptiometry, Photon; D000328:Adult; D015519:Bone Density / Q000502:physiology*; D002114:Calcinosis / Q000000981:diagnostic imaging / Q000453:epidemiology; D017023:Coronary Angiography / Q000379:methods; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D003331:Coronary Vessels / Q000473:pathology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000453:epidemiology*; D015663:Osteoporosis, Postmenopausal / Q000453:epidemiology; D012307:Risk Factors; D013624:Taiwan / Q000453:epidemiology