Abstract:

Aim: was to compare results of bone densitometry techniques, conducted by quantitative computed tomography (QCT) and dual-energy X-ray absorptiometry (DXA) in postmenopausal women.

Material and methods: the study included 210 women in postmenopausal period, who were divided by age into four groups: 50-59 years, 60-69 years, 70-79 years, 80 years and older. All patients underwent densitometry of the lumbar spine by quantitative computed tomography anc dual-energy X-ray absorptiometry in the range of 1-2 weeks.

Results: in the evaluation of bone mineral density by methods of QCT and DXA in the age group 50-59 years, there were no significant differences in results of densitometry During of QCT, osteoporosis was diagnosed in 20.5%, during DXA - 15.1% of patients. Since the age of 60 years and older - incidence of osteoporosis by QCT was higher than in the DXA. Evaluation of correlation indicators QCT and DXA, in all four groups showed a positive association of moderate strength, which decreases with increasing age (I group: r=0.68, p=0.001; II group: r=0.57, p=0.001; III group: r=0.40, p=0.003; IV group: r=0.40, p=0.04).

Conclusion: after 60 years, the incidence of osteoporosis, shown by quantitative computed tomography is higher in comparison with dual-energy X-ray absorptiometry.