Associations between short one-leg standing time and speed of sound of calcaneal bone in a general population: the Shimanami Health Promoting Program (J-SHIPP) study
| Autor: | Namiko Ochi, Michiya Igase, Tetsuro Miki, Katsuhiko Kohara, Eri Uetani, Tomoko Kido, Yasuharu Tabara |
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| Rok vydání: | 2010 |
| Předmět: |
Male
medicine.medical_specialty Cross-sectional study Population Computed tomography Muscle mass Risk Factors Quantitative assessment Medicine Humans education Postural Balance Aged Ultrasonography education.field_of_study medicine.diagnostic_test business.industry Confounding Middle Aged Quantitative ultrasound Bone Diseases Metabolic Calcaneus Cross-Sectional Studies ROC Curve Physical therapy Exercise Test Female business Bone mass |
| Zdroj: | Geriatricsgerontology international. 10(2) |
| ISSN: | 1447-0594 |
| Popis: | Loss of bone mass is a major cause of fracture in the elderly. One-leg standing (OLS) time has been postulated to be predictive of reduced bone mass. Here, we conducted a cross-sectional study to clarify whether OLS time measurements are associated with the speed of sound (SOS) of calcaneal bone independent of muscle mass in the lower extremity, a major confounding factor for the association, in a community-dwelling population of middle-aged to elderly subjects.The study subjects consisted of 770 apparently healthy middle-aged to elderly community-residents. Quantitative assessment of calcaneal bone was done using a quantitative ultrasound technique. OLS time with eyes open was measured with a maximum time of 60 s. Femoral muscle cross-sectional area (CSA) was measured from a computed tomography image.Subjects who could not stand 60 s on one leg (n = 192) showed significantly lower SOS (1487 +/- 20, 1501 +/- 24 m/s, P0.001). In addition, femoral muscle CSA was positively associated with SOS (male, r = 0.148, P0.01; female, r = 0.204, P0.001). However, multiple regression analysis adjusted for age, sex and muscle CSA identified short OLS time less than 60 s as an independent determinant of SOS in both male (P0.001) and female (P0.05) subjects. OLS time was significantly associated with posturograph-measured mobility of the center of gravity. However, multiple regression analysis showed no significant correlation between balance impairment and SOS (P0.1).OLS time less than 60 s was significantly associated with reduced SOS independent of age, sex and muscle mass in the lower extremity. |
| Databáze: | OpenAIRE |
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