各種骨密度測定法による骨粗しょう症検診結果の比較　　腰椎ＤＸＡ法，前腕ＤＸＡ法，しょう骨ＳＸＡ法，しょう骨超音波法の比較

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  • Comparison of the Results of Screening for Osteoporosis Using Various Measuring Methods of Bone Mineral Density. Comparison between Lumbar DXA, Forearm DXA, Calcaneus SXA, and Calcaneus USD.
  • Comparison between Lumbar DXA, Forearm DXA, Calcaneus SXA, and Calcaneus USD
  • 腰椎DXA法, 前腕DXA法, 踵骨SXA法, 踵骨超音波法の比較

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we investigated the correlation between various measuring methods of bone mineral density (lumbar dual X-ray absorptiometry (DXA), forearm DXA, calcaneus single X-ray absorptiometry (SXA), and calcaneus ultrasound densitometry (USD)), and compared the results of screening for osteoporosis.<br>20 healthy females ages 20 to 69 were selected for this study.<br>The measurement of the bone mineral density was carried out using lumbar DXA (DPX-α, Lunar), forearm DXA (DPX-α, Lunar), calcaneus SXA (SXA 2000, Dove Medical Systems), and calcaneus USD (A-1000 PLUS, Lunar) for each subject.<br>The correlation coefficient of lumbar DXA vs forearm DXA, calcaneus SXA, and calcaneus USD was 0.605, 0.787, 0.624 respectively in all subjects. Those of the lumbar DXA<1 subjects were 0.459, 0.533, 0.257 respectively. The correlation coefficient of forearm DXA vs calcaneus SXA and calcaneus USD was 0.742 and 0.642 respectively, and that of calcaneus SXA vs calcaneus USD was 0.804 in all subjects.<br>Detective ability of osteopenia was highest in calcaneus SXA followed by forearm DXA and calcaneus USD by receiver operating characteristic analysis based on lumbar DXA.<br>The sensitivity of the screening for osteoporosis of forearm DXA, calcaneus SXA, and calcaneus USD based on lumbar DXA was 50%, 78%, and 22% respectively; that of lumbar DXA, calcaneus SXA, and calcaneus USD based on forearm DXA was 47%, 79%, and 42% respectively; that of lumbar DXA, forearm DXA, and calcaneus USD based on calcaneus SXA was 54%, 58%, and 38% respectively; and that of lumbar DXA, forearm DXA, and calcaneus SXA based on calcaneus USD was 33%, 67%, and 83% respectively.

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