Department of Orthopaedics, Gold Coast University Hospital, Gold Coast, Queensland, Australia.
ANZ J Surg. 2020 Jun;90(6):1067-1069. doi: 10.1111/ans.15819. Epub 2020 Mar 12.
Following wrist fracture, it is desirable to identify patients with osteoporosis. A smartphone-based application (BoneGauge) that uses second metacarpal cortical thickness ratio (2MCP) measured on X-ray has been proposed. This study aims to validate this application using dual-energy X-ray absorptiometry scan in a cohort of patients with distal radius fractures.
Thirty subjects aged 50 and over who sustained low-energy fractures of the radius were recruited and measurements were completed by two independent observers using the application.
The interrater reliability as a screening tool was insufficient (κ = 0.61). Using the 2MCP threshold of 60% for detection of osteopaenia or osteoporosis, we found insufficient correlation between the dual-energy X-ray absorptiometry scan and the two sets of readings using the application (κ = 0.28 and 0.35, respectively).
On the basis of these results, 2MCP of 60% is not sensitive enough to be used as a screening tool via a smartphone application for assessment of osteoporosis risk.
腕骨骨折后，需要识别骨质疏松症患者。已经提出了一种基于智能手机的应用程序（BoneGauge），该程序可通过 X 射线测量第二掌骨皮质厚度比（2MCP）。本研究旨在使用双能 X 射线吸收法扫描对桡骨远端骨折患者的队列进行该应用程序的验证。
招募了 30 名年龄在 50 岁及以上的低能量桡骨骨折患者，由两名独立观察者使用该应用程序完成测量。
作为筛查工具的观察者间可靠性不足（κ=0.61）。使用 2MCP 阈值为 60%来检测骨质疏松或骨量减少，我们发现双能 X 射线吸收法扫描与应用程序的两组读数之间相关性不足（κ 值分别为 0.28 和 0.35）。
基于这些结果，60%的 2MCP 对于通过智能手机应用程序评估骨质疏松风险作为筛查工具来说不够敏感。
