Bone Abstracts

Introduction: Bioelectrical impendance analysis (BIA) and dual enargy X-ray absorptiometry (DXA) are two most common methods used for body composition analysis. The aim of this study was to investigate: i) if there is a correlation between body mineral content (BMC) determined by BIA and by DXA for bone mineral content (BMC) and ii) correlation of BMC (BIA) vs bone mineral density (BMD) of L1–L4 spine, dual femur total mean and neck mean.

Methods: Twenty-seven healthy young men and women (age 19–23 years) were examined by BIA and DXA.

Results: I) There was correlation between BMC obtained by two methods at: i) L1–L4 spine r=0.5865 (P=0.0021), ii) dual femur total mean r=0.7553 (P<0.0001), iii) dual femur neck mean r=0.6716 (P=0.0002). When analyzed by sex, for male subjects (n=13) there was only correlation of BMC between BIA and DXA for L1–L4 spine (r=0.615, P=0.044), and no correlation in dual femur total mean and neck mean, while for females (n=14) correlation was obtained in all three sites; for L1–L4 spine r=0.739 (P=0.003), for dual femur total mean r=0.726 (P=0.003), and for neck mean r=0.785 (P=0.003). II) Correlation between bone mineral content (BMC by BIA) and BMD (by DXA) was obtained only at dual femur total mean (r=0.4738, P=0.0167), and not in other two sites when all examinees were included. In group of male subjects there was no correlation at any site, and in group of females there was correlation at dual femur total mean (r=0.726, P=0.003), and at neck mean (r=0.709, P=0.005), and no correlation at L1–L4 spine.

Conclusion: BMC vs BMD density showed correlation only in female subjects. Both methods can reliably determine the BMC. However, when taking into account the sex, the most reliable analysis is BMC at L1–L4 spine, showing correlation of these two methods in both sexes.