Comparative bone status assessment by dual energy X-ray absorptiometry, peripheral quantitative computed tomography and quantitative ultrasound in adolescents and young adults with cystic fibrosis

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• 作者：Jean De Schepper^a ; ^c ; ^{jean.deschepper@uzbrussel.be} ; Inge Roggen^a ; Stephanie Van Biervliet^b ; Eddy Robberecht^b ; Inge Gies^a ; Kathleen De Waele^c ; Elke De Wachter^d ; Anne Malfroot^d ; Frans De Baets^e ; Kaatje Toye^f ; Stefan Goemaere^f ; Olivia Louis^g
• 关键词：Cystic fibrosis ; Bone mass ; Bone densitometry ; Osteoporosis ; Quantitative ultrasound bone sonometry
• 刊名：Journal of Cystic Fibrosis
• 出版年：2012
• 期刊代码：298_15691993
• 类别：med
• 出版时间：March, 2012
• 卷：11
• 期：2
• 页码：119-124
• 文件大小：305 K

摘要

Purpose

Quantitative ultrasound bone sonometry (QUS) might be a promising screening method for cystic fibrosis (CF)-related bone disease, given its absence of radiation exposure, portability of the equipment and low cost.The value of axial transmission forearm QUS in detecting osteopenia in CF was therefore studied.

Methods

We investigated the application of QUS in the evaluation of bone status in a group of 64 adolescents (> 12 years) and young adults (< 40 years) with CF in a comparison with a dual X-ray absorptiometry (DXA) of the whole body and peripheral quantitative computed tomography (pQCT) of the radius at 4%and 66%sites.

Results

Mean (SD) Z-scores of speed of sound (SOS), whole body bone mineral content (BMC), radial trabecular bone mineral density (BMD), and radial cortical BMD were respectively 鈭?#xA0;0.31 (0.78), 鈭?#xA0;0.09 (1.28), 0.10 (1.16) and 鈭?#xA0;0.62 (2.88). The pQCT determined bone geometry values (cortical bone area and cortical thickness) were more depressed than the BMD data. QUS had a sensitivity and specificity of respectively 0%and 96%for diagnosing osteopenia (based on a whole body BMC Z-score < 鈭?#xA0;2).

Conclusions

QUS cannot replace DXA, but can screen out patients with normal bone mass. Further and larger studies are needed to examine if QUS may reflect other aspects than bone mass, or if it is possible to improve its sensitivity by supplementing the SOS results with clinical risk factors.