全髋关节置换髋臼假体预测模型建立与验证

Establishment and verification of acetabular component prediction model for total hip arthroplasty

[目的]建立一个多元线性方程预测全髋关节置换术(total hip arthroplasty,THA)术中所使用的髋臼假体直径(外径)。[方法]2019年3月—2022年11月在本院行THA的182例(182髋)患者纳入本研究。对实际使用髋臼假体外直径与患者生理测量参数行Pearson相关性分析,以髋臼假体外径为因变量,患者生理参数为自变量,建立多元线性回归方程。将验证队列的数据代入多元线性方程所得到的预测髋臼假体直径与实际所用的髋臼假体直径相比,评估预测方程的准确性。[结果]Pearson相关分析表明,髋臼假体外直径与身高(r=0.653,P<0.001)、体重(r=0.627,P<0.001)、足长(r=0.633,P<0.001)呈显著正相关,而与年龄无显著相关性(P>0.05)。多元线性回归得预测方程:Y(髋臼假体直径mm)=20.702+0.465×足长(cm)+0.090×身高(cm)+0.086×体重(kg)。该方程预测在一个尺寸之内假体的准确率为70.9%,预测在两个尺寸之内假体的准确率为90.9%。[结论]人体测量数据能够准确预测THA中髋臼假体直径。

[Objective]To establish a multivariate linear equation to predict the acetabular component diameter(external diameter)of used in total hip arthroplasty(THA).[Methods]A total of 182 patients(182 hip patients)who underwent THA in our hospital from March 2019 to November 2022 were included in this study.Pearson correlation analysis was performed on in outer diameter of acetabular component and physiological measurement parameters of patients.Multiple linear regression equations were established with the outer diameter of acetabular prosthesis as the dependent variable,while the physiological parameters of patients as the independent variable.The accuracy of the predicted acetabular outer diameter obtained by substituting the data from the validation cohort into the multivariate linear equation was compared with the actual acetabular outer diameter.[Results]Pearson correlation analysis showed that the acetabular outer diameter was significantly positive correlated to the body height(r=0.653,P<0.001),body weight(r=0.627,P<0.001),foot length(r=0.633,P<0.001),but no significant correlation with age(P>0.05).The prediction equation obtained by multiple linear regression was as follows:Y(outer diameter of acetabular component,mm)=20.702+0.465×foot length(cm)+0.090×height(cm)+0.086×body weight(kg).The accuracy of the equation was 70.9%in predicting the prosthesis within difference in one size and 90.9%in predicting the prosthesis within difference in two sizes.[Conclusion]The anthropometric data can accurately predict the outer diameter of acetabular component in THA.