Correlation Analysis between Bone Mineral Density and Grip Strength and PhysicalMobility in Hospitalized Elderly Patients

Abstract

Objective To investigate the relationship between grip strength and physical mobility and bone mineral density(BMD) in elderly hospitalized patients. Methods 235 elderly patients(≥ 60 years) treated in the Department of Geriatrics of the Second Affiliated Hospital of Dalian Medical University from October 2020 to October 2021 were selected to assess their grip strength and physical mobility(gait speed, 5 sitting up test time, and up-and-go test time) and analyze their correlation with BMD. Results Univariate analysis showed that grip strength and gait speed were positively correlated with BMD, and up-and-go test time and 5 sitting up test time were negatively correlated with BMD, and this correlation was present in patients of both genders(P<0.001).Partial correlation analysis showed that grip strength and gait speed were positively correlated with BMD(P<0.001);5 sitting up test time and get-up and go test times were negatively correlated with BMD(P<0.001).The results of multiple linear regression analysis showed that BMI, grip strength, time of get-up and go test, and time of 5 sitting up test were the main influencing factors of BMD(R2=0.449, P<0.05). Conclusion An appropriate increase in BMI, muscle strength and improving physical mobility may be beneficial in maintaining BMD for the elderly patients.

Keywords

• elderly patients
• bone mineral density
• grip strength
• physical mobility