Accession Number : ADA194300

Title :   A Minitab Macro for the Kaplan-Meier Product Limit Estimator and Gehan's Test.

Descriptive Note : Technical summary rept.,

Corporate Author : WISCONSIN UNIV-MADISON CENTER FOR MATHEMATICAL SCIENCES

Personal Author(s) : Soms, Andrew P

PDF Url : ADA194300

Report Date : Nov 1987

Pagination or Media Count : 18

Abstract : Minitab is a user-friendly statistical computer package widely used in industry and academia. The Kaplan-Meier ple and Gehan's test are often used in biostatistics and reliability theory to compare two survival distributions. The main idea of the program is to first break ties between censored and completed observations by adding to the censored observations one-half of the smallest non-zero difference for the ordered combined observations. This does not change the K-M ple or Gehan's test. Then, using an extension of Macro for obtaining distinct values and replicate counts from a column of replicated data by Gunter, Minitab Users' Group Newsletter, 5 (1984), 1, an ordered table of distinct values, together with total replications, type of observation (censored or completed), number in group one and number in group two, is constructed. From this, the K-M ple and Gehan's test are then readily computed. The second version of the program, kmt.geh, in addition to doing everything the first, km.geh, does, also prints out the table and Gehan's scores.

Descriptors :   *COMPUTER PROGRAMS, *STATISTICAL ANALYSIS, BIOSTATISTICS, DISTRIBUTION, RELIABILITY, SURVIVAL(GENERAL), THEORY, COMPUTATIONS

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE