高齢者の骨塩量変動に対する身体的諸因子

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  • ON THE PHYSICAL FACTORS INFLUENCING ON THE BONE MINERAL DENSITY OF THE ELDERLY

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Individual characteristics such as sex, age, height and weight have been considered as the factors influencing bone mineral density (BMD). The purpose of this study is to analyze the relation between these factors and the data of BMD obtained from 387 healty old persons (176 males and 211 females) at the age of 65 and over who are living in an urban community in a western suburb of Tokyo and chosen by randomized sampling. BMD of the third lumbar spine from lateral projection using dual energy X-ray absorptiomery (DEXA) in the van was measured during a general health survey which included other physical examinations such as weight, height, blood pressure and so on. BMD obtained was analyzed in relation to these variables using both simple and multiple regression analyses. Standard regression coefficients showed that all physical variables had a significant relationship to BMD except the height in males. Standard regression coefficients of height and age for the males were the same, but height was evaluated to have slight influence on BMD by statistically. In a multiple regression analysis, the multiple correlation coefficient was somewhat lower in both sexes (males : R=0.448; females : R=0.381) than expected. Our analyses of these factors showed that there might be other possible factors influencing BMD regarding the elderly with the exception of age, sex, height and weight.

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