膝关节骨性关节炎X线测量与WOMAC评分的多重线性回归分析

目的:进行膝关节骨性关节炎X线测量与WOMAC评分的多重线性回归分析,结合临床和生物力学分析两者的关系。方法:自2011年3月至2011年7月,膝关节骨性关节炎患者140例250膝,左侧132膝,右侧118膝;年龄40～71岁,平均54.68岁。应用MB-RULER测量软件测量患膝正侧位X线片股骨角、胫骨角、股胫角及关节间隙角等数值,并采集WOMAC评分,应用多重线性回归建立回归方程分析两者相关性。结果:应用多重线性回归分析正位X线片测量数值与WOMAC评分的回归方程有统计学意义(P<0.05),而侧位X线片测量数值与WOMAC评分的回归方程无统计学意义(P>0.05)。结论:①膝关节X线数据测量可以一定程度上反映WOMAC评分的情况;②局部膝关节X线力线测量对诊治膝关节骨性关节炎是必须的检查之一,应予以重视。③正位片上胫骨角、关节间隙角与WOMAC评分的相关性最大,可用于评估患者在治疗前后的功能恢复情况。

Multiple linear regression analysis of X-ray measurement and WOMAC scores of knee osteoarthritis

Objective:To perform Multiple Linear Regression analysis of X-ray measurement and WOMAC scores of knee osteoarthritis,and to analyze their relationship with clinical and biomechanical concepts.Methods:From March 2011 to July 2011,140 patients(250 knees) were reviewed,including 132 knees in the left and 118 knees in the right;ranging in age from 40 to 71 years,with an average of 54.68 years.The MB-RULER measurement software was applied to measure femoral angle,tibial angle,femorotibial angle,joint gap angle from antero-posterir and lateral position of X-rays.The WOMAC scores were also collected.Then multiple regression equations was applied for the linear regression analysis of correlation between the X-ray measurement and WOMAC scores.Results:There was statistical significance in the regression equation of AP X-rays value and WOMAC scores(P<0.05),while there was no statistical significance in the regression equation of lateral X-ray value and WOMAC scores(P>0.05).Conclusion:① X-ray measurement of knee joint can reflect the WOMAC scores to a certain extent.② It is necessary to measure the X-ray mechanical axis of knee,which is important for diagnosis and treatment of osteoarthritis.③ The correlation between tibial angle,joint gap angle on antero-posterior X-ray and WOMAC scores is significant,which can be used to assess the functional recovery of patients before and after treatment.