Orthopaedic and Rehabilitation Engineering Center (Marquette University/Medical College of Wisconsin), Milwaukee, WI, USA.
Gait Posture. 2010 Jan;31(1):32-6. doi: 10.1016/j.gaitpost.2009.08.240. Epub 2009 Sep 22.
Multi-site application of biomechanical models can be a powerful tool as quantitative methods are employed to improve clinical care and to assess larger populations for research purposes. However, the use of such models depends on adequate validation to assure reliability in inter-site measures. We assessed repeatability and sources of variability associated with the assessment of segmental foot kinematics using the Milwaukee Foot Model during multiple testing sessions at two sites. Six healthy ambulators were instrumented and tested during comfortable ambulation; data were analyzed with variance components analysis using a mixed effects linear model. Results indicated that the largest source of variability was inter-subject; measurement error associated with Site and Session fell below 3.5 degrees in over 80% of position measurements and below 2.5 degrees in over 80% of ROM measurements. These findings support the continued use of the segmental foot model at multiple sites for clinical and research purposes.
多站点应用生物力学模型可以是一种强大的工具，因为定量方法可用于改善临床护理，并评估更大的人群以进行研究目的。然而，此类模型的使用取决于充分的验证，以确保在站点间测量中的可靠性。我们评估了在两个站点的多次测试期间，使用 Milwaukee 足部模型评估节段性足部运动学的可重复性和变异性来源。六名健康的步行者在舒适的步行时被仪器化和测试；使用混合效应线性模型的方差分量分析对数据进行了分析。结果表明，最大的变异性来源是受试者间的差异；与站点和测试会话相关的测量误差在超过 80%的位置测量中低于 3.5 度，在超过 80%的 ROM 测量中低于 2.5 度。这些发现支持在多个站点继续使用节段性足部模型用于临床和研究目的。
