Latvis V, Peduzzi P
Cooperative Studies Program Coordinating Center, Veterans Administration Medical Center, West Haven, CT 06516.
Comput Methods Programs Biomed. 1989 Jan;28(1):31-6. doi: 10.1016/0169-2607(89)90178-8.
A computer program is described to calculate ratio estimates for an endpoint measured on patient subunits, such as progression of disease in coronary arteries and extent of dental caries. The program calculates ratio estimates for levels of stratification factors measured in the patient as a unit, e.g. age and sex. Test statistics are computed to evaluate differences in ratio estimates for factors with two levels. A method for making pairwise comparisons for factors with more than two levels is also described, but is not computed by the program. Data from the Veterans Administration Study of Bypass Surgery (Am. J. Cardiol. 40 (1977) 212-225) are used to illustrate the features of the program.
本文描述了一个计算机程序，用于计算在患者亚组中测量的终点指标的比率估计值，例如冠状动脉疾病的进展和龋齿的程度。该程序以患者为单位计算分层因素水平的比率估计值，例如年龄和性别。计算检验统计量以评估具有两个水平的因素的比率估计值之间的差异。还描述了一种对具有两个以上水平的因素进行成对比较的方法，但该程序不进行计算。来自退伍军人管理局搭桥手术研究（《美国心脏病学杂志》40 (1977) 212 - 225）的数据用于说明该程序的特点。
