1.Daily activity relates to not only femoral bone mineral density, but also hip structural analysis parameters: A cross-sectional observational study
Norifumi FUJII ; Nobukazu OKIMOTO ; Manabu TSUKAMOTO ; Norimitsu FUJII ; Kei ASANO ; Yoshiaki IKEJIRI ; Toru YOSHIOKA ; Takafumi TAJIMA ; Yoshiaki YAMANAKA ; Yukichi ZENKE ; Makoto KAWASAKI ; Junya OZAWA ; Takuya UMEHARA ; Shogo TAKANO ; Hideaki MURATA ; Nobuhiro KITO
Osteoporosis and Sarcopenia 2021;7(4):127-133
Objectives:
Physical activity to maintain bone mass and strength is important for hip fracture prevention. We aim to investigate the relationship between physical performance/activity status and bone mineral density (BMD)/hip structural analysis (HSA) parameters among postmenopausal women in Japan.
Methods:
Sixty-two postmenopausal women diagnosed with osteoporosis (mean age: 72.61 ± 7.43 years) were enrolled in this cross-sectional observational study. They were evaluated for BMD and HSA in the proximal femur by dual-energy X-ray absorptiometry and underwent several physical performance tests, the Geriatric Locomotive Function Scale of 25 questions (GLFS-25). Principal component analysis (PCA) was used to summarize data on the BMD/HSA parameters. Partial correlation analysis, multiple regression analysis, and structural equation modeling (SEM) were performed to investigate the relationship between physical performance/activity status and BMD/HSA parameters of the proximal femur.
Results:
In a partial correlation analysis adjusted for age and body mass index (BMI), GLFS-25 scores were correlated with HSA parameter (|r| = 0.260–0.396, P < 0.05). Principal component 1 (PC1) calculated by PCA was interpreted as more reflective of bone strength based on the value of BMD/HSA parameters. The SEM results showed that the model created by the 3 questions (Q13, brisk walking; Q15, keep walking without rest; Q20, load-bearing tasks and housework) of the GLFS-25 had the best fit and was associated with the PC1 score (β = −0.444, P = 0.001).
Conclusions
The GLFS-25 score was associated with the BMD/HSA parameter, which may reflect the bone strength of the proximal femur as calculated by PCA.
Result Analysis
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