Correlates of trabecular and cortical volumetric bone mineral density at the femoral neck and lumbar spine: The osteoporotic fractures in men study (MrOS)

Jane A. Cauley, Terri Blackwell, Joseph M. Zmuda, Robin L. Fullman, Kristine E. Ensrud, Katie L. Stone, Elizabeth Barrett-Connor, Eric Orwoll

Research output: Contribution to journalArticle

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Abstract

The objective of this cross-sectional analysis was to examine the correlates of trabecular and cortical volumetric bone mineral density (vBMD) in 3670 community-dwelling men, mean age 73.6 ± 5.9 years. vBMD was measured by quantitative computed tomography (QCT) and areal BMD by dual-energy X-ray absorptiometry (DXA). Demographic, historical, and lifestyle information was obtained by interview, and height, weight, and neuromuscular function were determined by examination. To express the strength of the associations, percent differences (95% confidence interval) were calculated from multivariable linear regression models using the formula 100 (b x unit/mean BMD). Units for continuous variables were chosen to approximate 1 standard deviation (SD). The multivariable linear regression models predicted 15%, 21%, and 20% of the overall variance in trabecular and cortical vBMD of the femoral neck and vBMD of the lumbar spine, respectively. Diabetes was associated with a 16.5% greater trabecular vBMD at the femoral neck and 11% at the lumbar spine but less than 2% for cortical vBMD. For femoral neck trabecular vBMD, the strongest negative correlates were past smoking (-9%), fracture history (-15%), kidney stones (-7%), corticosteroids (-11%), and insulin therapy (-26%). For cortical vBMD, the strongest negative correlate was use of thyroid medication (-2.8%). The strongest negative correlates for lumbar spine trabecular vBMD were fracture history (-5%), antiandrogen use (-19%), height (-8%), and thiazoliainedione use (-22%). Bioavailable estradiol and testosterone levels were positively related and sex hormone-binding globulin was negatively related to trabecular vBMD of the spine. There was no relationship between sex hormones and femoral neck trabecular vBMD. Our conclusion is that correlates of trabecular vBMD and cortical vBMD appear to differ in older men.

Original languageEnglish (US)
Pages (from-to)1958-1971
Number of pages14
JournalJournal of Bone and Mineral Research
Volume25
Issue number9
DOIs
StatePublished - Sep 2010

Fingerprint

Osteoporotic Fractures
Femur Neck
Bone Density
Spine
Linear Models
Cortical Bone
Independent Living
Androgen Antagonists
Sex Hormone-Binding Globulin
Kidney Calculi
Photon Absorptiometry
Gonadal Steroid Hormones
Testosterone
Cancellous Bone
Life Style
Estradiol
Adrenal Cortex Hormones
Thyroid Gland

Keywords

  • Areal bone mineral density
  • Cortical bone
  • Male osteoporosis
  • Trabecular bone
  • Volumetric bone mineral density

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Endocrinology, Diabetes and Metabolism

Cite this

Correlates of trabecular and cortical volumetric bone mineral density at the femoral neck and lumbar spine : The osteoporotic fractures in men study (MrOS). / Cauley, Jane A.; Blackwell, Terri; Zmuda, Joseph M.; Fullman, Robin L.; Ensrud, Kristine E.; Stone, Katie L.; Barrett-Connor, Elizabeth; Orwoll, Eric.

In: Journal of Bone and Mineral Research, Vol. 25, No. 9, 09.2010, p. 1958-1971.

Research output: Contribution to journalArticle

Cauley, Jane A. ; Blackwell, Terri ; Zmuda, Joseph M. ; Fullman, Robin L. ; Ensrud, Kristine E. ; Stone, Katie L. ; Barrett-Connor, Elizabeth ; Orwoll, Eric. / Correlates of trabecular and cortical volumetric bone mineral density at the femoral neck and lumbar spine : The osteoporotic fractures in men study (MrOS). In: Journal of Bone and Mineral Research. 2010 ; Vol. 25, No. 9. pp. 1958-1971.
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