Factors Affecting Bone Mineral Density of Postmenopausal Japanese Women

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  • 閉経後の日本人女性の骨密度に影響を及ぼす要因
  • ヘイケイ ゴ ノ ニホンジン ジョセイ ノ コツミツド ニ エイキョウ オ オヨボス ヨウイン

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Abstract

This study was performed on 53 postmenopausal women to evaluate how factors, such as the number of years after menopause and nutrition uptake status, are related with total bone mineral density (BMD), lumbar spine BMD, and broadband ultrasound attenuation (BUA) of calcaneus. The subjects were divided into 3 age groups : 20 subjects in the sixties, 24 subjects in the seventies, and 9 subjects in the eighties and older. As a result, in the group of the sixties, the number of years after menopause showed significant negative correlation with BMD, while significant correlation was not found in the groups of the seventies and the eighties and older. In BMD and nutrition uptake status, no significant correlation was found in the groups of the sixties and the seventies. On the other hand, in the group of the eighties and older, significant positive correlation was seen between total BMD and protein uptake (r=0.740 ; p<0.05) or vitamin B1 uptake (r=0.720 ; p<0.05), and also between lumbar spine BMD and calcium uptake (r=0.685 ; p<0.05), and further, between calcaneal BUA and iron uptake (r=0.893 ; n=6). These results suggest that the number of years after menopause exerts influence on BMD and/or BUA in the group of the eighties, while nutrition uptake status gives influence in the groups of the eighties and older.

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