考虑手术分类协变量的风险调整EWMA控制图  

A Risk-adjusted EWMA Chart for Monitoring Surgical Performance Considering Categorical Covariates

作　　者：李龙辉 商艳芬[1] 刘彦利 刘子先[1] LI Longhui;SHANG Yanfen;LIU Yanli;LIU Zixian(College of Management and Economics,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学管理与经济学部,天津300072

出　　处：《工业工程与管理》2023年第6期193-200,共8页Industrial Engineering and Management

基　　金：国家自然科学基金面上项目(71871158);国家自然科学基金重大研究计划重点支持项目(91746205);国家自然科学基金重点项目(72231005)。

摘　　要：目前监控手术表现的控制图大多是依据病人个体之间的体征差异进行风险调整,缺乏同时对手术中其他风险因素和手术表现波动性的考虑。针对这一问题,将手术中的操作因素作为分类协变量,在加权分数检验统计量的基础上,构建考虑分类协变量的风险调整指数加权移动平均控制图。通过仿真研究和实例分析表明,与其他类型的风险调整控制图相比,该方法在检测风险调整模型中位置参数和尺度参数变化时的表现性能更好,证明了所提模型方法的适用性和有效性。Most existing control charts for monitoring surgical performance are adjusted for preoperative risk due to differences in physical signs between individual patients.However,little attention has been paid to other risk factors and the volatility of surgical performance.A new riskadjusted exponentially weighted moving average(EWMA)control chart was constructed based on weighted score test statistics with the operational factors as a categorical covariate.Simulation results and real case show that the proposed method has better performance in detecting the changes of location and scale parameters in the risk-adjusted model compared with other existing risk adjustment control charts,which proves the applicability and effectiveness of the proposed method.

关 键 词：分类协变量 手术表现 风险调整 EWMA控制图 

分 类 号：O213.1[理学—概率论与数理统计]