Assessing forearm fracture risk in postmenopausal women.

Assessing forearm fracture risk in postmenopausal women.
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DOI:
10.1007/s00198-009-1047-2
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发表时间:
2010-07
影响因子:
4
通讯作者:
Khosla, S.
Khosla, S.
中科院分区:
医学2区
文献类型:
--
作者:
Melton, L. J., III;Christen, D.;Riggs, B. L.;Achenbach, S. J.;Mueller, R.;van Lenthe, G. H.;Amin, S.;Atkinson, E. J.;Khosla, S.

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目的:探讨前臂骨折风险评估方法的临床应用。在100名患有前臂远端骨折的绝经后妇女(病例)和105名无骨质疏松性骨折的妇女(对照组)中,我们测量了面骨矿物质密度(aBMD),并使用高分辨率外周QCT评估了桡骨体积骨密度、几何形状和微观结构;采用微有限元(μFE)模型对超远端半径破坏载荷进行评估。骨折患者骨密度、几何形状、显微结构和强度均较差。五个类别中最重要的骨折决定因素是:骨密度(股骨颈aBMD:比值比[OR] / SD, 2.0; 95% CI, 1.4-2.8)、几何形状(皮质厚度:OR, 1.5; 95% CI, 1.1-2.1)、微观结构(结构模型指数[SMI]: OR, 0.5; 95% CI, 0.4-0.7)和强度(μFE失效负荷:OR, 1.8; 95% CI, 1.3-2.5);这些病例的风险因子(向前跌落时施加的载荷÷ μFE失效载荷)差15% (OR, 1.9; 95% CI, 1.4-2.6)。ROC曲线下面积(AUC)为0.62 ~ 0.68。进入多变量模型的前臂骨折风险预测因子是股骨颈aBMD和SMI(合并AUC, 0.71)。详细的骨结构和强度测量提供了对前臂骨折发病机制的深入了解,但股骨颈aBMD足以用于常规临床风险评估。
To test the clinical utility of approaches for assessing forearm fracture risk. Among 100 postmenopausal women with a distal forearm fracture (cases) and 105 with no osteoporotic fracture (controls), we measured areal bone mineral density (aBMD) and assessed radius volumetric BMD, geometry and microstructure using high-resolution peripheral QCT; ultradistal radius failure load was evaluated in micro-finite element (μFE) models. Fracture cases had inferior bone density, geometry, microstructure and strength. The most significant determinant of fracture in five categories were: bone density (femoral neck aBMD: odds ratio [OR] per SD, 2.0; 95% CI, 1.4–2.8), geometry (cortical thickness: OR, 1.5; 95% CI, 1.1–2.1), microstructure (structure model index [SMI]: OR, 0.5; 95% CI, 0.4–0.7), and strength (μFE failure load: OR, 1.8; 95% CI, 1.3–2.5); the factor-of-risk (applied load in a forward fall ÷ μFE failure load) was 15% worse in cases (OR, 1.9; 95% CI, 1.4–2.6). Areas under ROC curves (AUC) ranged from 0.62 to 0.68. The predictors of forearm fracture risk that entered a multivariable model were femoral neck aBMD and SMI (combined AUC, 0.71). Detailed bone structure and strength measurements provide insight into forearm fracture pathogenesis, but femoral neck aBMD performs adequately for routine clinical risk assessment.
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发表时间: 2007-12-01
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影响因子: 2.4
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