Davis C S, Hall D B
Department of Preventive Medicine and Environmental Health, University of Iowa, Iowa City 52242, USA.
Comput Methods Programs Biomed. 1996 Nov;51(3):153-69. doi: 10.1016/s0169-2607(96)01748-8.
RMORD is an easy-to-use FORTRAN program for the analysis of clustered ordinal data using the method of Stram, Wei, and Ware. This method constitutes an extension of the proportional-odds model to the situation in which groups of responses are correlated. At each measurement occasion, a proportional-odds regression model is fit to the data by maximizing the occasion-specific likelihood function. The joint asymptotic distribution of the occasion-specific regression parameter estimators is obtained along with a consistent estimator of their asymptotic covariance matrix. RMORD may be used when ordinal measurements are obtained at a common set of observation times for multiple subjects or clusters. Both missing data and covariates which vary within clusters can be accommodated. The program can be run on microcomputers, workstations, and mainframe computers. Two examples illustrating the usage and features of RMORD are provided.
RMORD是一个易于使用的FORTRAN程序，用于使用斯特拉姆、魏和韦尔的方法分析聚类有序数据。该方法是比例优势模型在响应组相关情况下的扩展。在每个测量时刻，通过最大化特定时刻的似然函数，将比例优势回归模型拟合到数据上。获得特定时刻回归参数估计量的联合渐近分布以及它们渐近协方差矩阵的一致估计量。当在多个受试者或聚类的一组共同观察时间获得有序测量时，可以使用RMORD。它可以处理缺失数据和聚类内变化的协变量。该程序可以在微型计算机、工作站和大型计算机上运行。提供了两个说明RMORD用法和特点的示例。
