Models of spinal trabecular bone loss as determined by quantitative computed tomography

Area of Science:

• Osteoporosis and Bone Metabolism
• Radiology and Imaging
• Gerontology

Background:

• Noninvasive bone densitometry is crucial for understanding age-related bone loss.
• Quantitative computed tomography (QCT) enables precise measurement of trabecular bone in vertebrae.

Purpose of the Study:

• To investigate the pattern and rate of age- and menopause-related bone loss in women.
• To establish normative data for trabecular bone mineral density using QCT.

Main Methods:

• Trabecular bone mineral density was measured in 538 healthy women (aged 20-80) using GE CT/T scanners.
• Statistical regression models, including cubic and two-phase regressions, were applied to analyze bone loss patterns.
• Analysis of variance was used to examine bone density changes across different age and menopausal groups.

Main Results:

• A cubic model best described overall spinal bone loss (r = -0.69).
• Average bone loss rate was -2.02 mg/ml/year, with accelerated loss during perimenopause (-4.39 mg/ml/year) and postmenopause (-1.99 mg/ml/year).
• Significant bone mineral density decrements were observed around menopause and continued into older age.

Conclusions:

• Bone loss accelerates significantly around menopause.
• QCT is effective in quantifying age- and menopause-related changes in trabecular bone mineral density.
• Findings emphasize the need for monitoring bone health in women, especially during and after menopause.