On Tue, 12 Aug 2003, Ciril Rozman wrote: > Sirs, > I have recently been interested in your Maxstat.
For questions related to add-on packages please at least cc to the maintainer since some might not read r-help regulary. > I have computed > with my own programme the ranks (by using the Kaplan-Meier method and > the > log-rank test) with the formula (Observed-Expected)/(SQR Var). The problem is what "SQR Var" really means. The maxstat package uses a reformulation of the logrank test as a linear rank statistic with special scores and, more important, uses a conditional variance estimator which is slightly different from the one implemented in "survdiff", for example. > The > results are similar but not exact to the M value obtained with the > Maxstat. I would like to know whether you are using some correction or > adjustment in computing the different ranks. The details can be found in the references cited in the documentation of the package, especially Hothorn & Lausen, 2003, CSDA, freely available from http://www.elseviermathematics.com/mathematicsweb/show/Main.htt?Name=&Source=Journal%2Ehtt&Key=Biostatistics&Results=Journal%2Ehtt&External=mathematicsweb%2F15 Best, Torsten > Thank you very much for > your help. > > Dr. C. Rozman > Professor of Medicine, Emeritus > University of Barcelona, Spain > E-mail : [EMAIL PROTECTED] > > [[alternative HTML version deleted]] > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
