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Medicine (Baltimore). 2018 Oct;97(40):e12303. doi: 10.1097/MD.0000000000012303.

Can radial bone mineral density predict spinal bone mineral density in patients with advanced Duchenne muscular dystrophy?

Kim E1,2, Cho HE1,2, Jung JH1,2, Lee JW3, Choi WA1,2, Kang SW1,2.

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Department of Rehabilitation Medicine and Rehabilitation Institute of Neuromuscular Disease.
Pulmonary Rehabilitation Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul.
Department of Physical Medicine and Rehabilitation, National Health Insurance Service Ilsan Hospital, Goyang, Korea.


In advanced Duchenne muscular dystrophy (DMD), patients with high bone fracture risk due to osteoporosis, it is difficult to measure spinal bone mineral density (BMD) because of maintaining proper posture. This study began with the idea that if we diagnose and manage osteoporosis by predicting spinal BMD through easily testable radial BMD, we could prevent fracture and improve quality of life in DMD patients. In 61 DMD patients aged 20 years or older who were admitted to Gangnam Severance Hospital from April 2013 to May 2015, radial BMD and spinal BMD were measured to compare their Z-scores. In 45 patients, the z-score was less than -2.0 in spinal BMD defined as osteoporosis. And the optimal range of Z-score in the radius was -5.2 to -5.0 (sensitivity 78.9%, specificity 71.4%). Only through the radius BMD, spinal BMD can be predicted and we suggest appropriate times for treatments.

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